{"id":209,"date":"2026-04-03T03:11:45","date_gmt":"2026-04-03T03:11:45","guid":{"rendered":"https:\/\/hxcnc.com\/?page_id=209"},"modified":"2026-10-06T02:16:19","modified_gmt":"2026-10-06T02:16:19","slug":"free-machining-steel-cnc-machining","status":"publish","type":"page","link":"https:\/\/hxcnc.com\/uk\/free-machining-steel-cnc-machining\/","title":{"rendered":"\u0421\u0442\u0430\u043b\u044c \u0437 \u043b\u0435\u0433\u043a\u0438\u043c \u043e\u0431\u0440\u043e\u0431\u043b\u0435\u043d\u043d\u044f\u043c, \u043e\u0431\u0440\u043e\u0431\u043a\u0430 \u043d\u0430 \u0427\u041f\u0423"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"209\" class=\"elementor elementor-209\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a3d0fd2 e-con-full e-flex e-con e-parent\" data-id=\"a3d0fd2\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3d98882 elementor-widget elementor-widget-html\" data-id=\"3d98882\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t\t<!-- FAQ Structured Data -->\n<script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is free-machining steel and why is it used for CNC machining?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Free-machining steels (also called free-cutting steels) are carbon steels with deliberate additions of sulfur, lead, phosphorus, or bismuth that improve machinability by promoting short, broken chips and reducing cutting forces. They are used in CNC machining when high production volume, fast cycle times, and excellent surface finish are more important than maximum mechanical strength or weldability. Common grades include 1215 (sulfur + phosphorus), 12L14 (leaded, the most machinable), and SUM24L (Japanese JIS standard equivalent to 12L14). Free-machining steels machine at speeds 100\u2013150% faster than standard carbon steels, significantly reducing per-part cost in high-volume production.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is 1215 steel and what are its main applications?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"1215 (AISI 1215, UNS G12150) is the highest-machinability non-leaded free-machining steel, containing elevated sulfur (0.26\u20130.35%) and phosphorus (0.04\u20130.09%) to produce short chips and reduce tool wear. It achieves a machinability rating of approximately 136% relative to AISI B1112. 1215 is used for high-volume turned components, hydraulic fittings, couplings, threaded rod, studs, and precision shafts where fast cycle times and excellent surface finish are required. It is not suitable for welding, heat treatment, or applications requiring significant ductility.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is 12L14 steel and how does it compare to 1215?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"12L14 (AISI 12L14, UNS G12144) is a leaded free-machining steel \u2014 the addition of lead (0.15\u20130.35%) to the 1215 base composition gives it a machinability rating of approximately 170% relative to AISI B1112, making it the most machinable steel grade commercially available. Lead inclusions act as internal lubricants during cutting, reducing friction, tool wear, and cutting temperatures. 12L14 produces excellent surface finishes on high-speed CNC lathes. It is used for precision components, instrument parts, fasteners, fittings, and bushings. Note: 12L14 contains lead and is subject to RoHS and REACH regulations \u2014 verify compliance before specifying in consumer or food-contact applications.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is SUM24L and how does it relate to 12L14?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"SUM24L is the Japanese JIS G 4804 standard designation for a free-machining steel equivalent to AISI 12L14. It is a leaded resulfurized carbon steel with composition and machinability very close to 12L14 \u2014 the 'L' suffix in both designations denotes lead content. SUM24L is the predominant free-machining steel grade in Japanese and East Asian manufacturing specifications, while 12L14 is the North American designation for the same alloy family. Both are interchangeable for most CNC turning and precision component applications.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can free-machining steels be heat treated or welded?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Free-machining steels (1215, 12L14, SUM24L) have very limited heat treatment and welding capability. They cannot be effectively case-hardened or through-hardened to useful strength levels due to their low carbon content and sulfur\/lead additions. Welding is not recommended \u2014 sulfur and lead inclusions cause hot cracking and porosity in the weld zone, and lead vaporizes during welding producing toxic fumes. If heat treatment or welding is required, specify a standard carbon steel (1018, 1045) or alloy steel instead. Free-machining steels are optimized purely for machining speed and surface finish.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What surface treatments are compatible with free-machining steels?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Free-machining steels (1215, 12L14, SUM24L) accept most standard surface treatments. Zinc plating (electroplating) is the most common finish for corrosion protection. Black oxide provides mild corrosion protection and a uniform dark appearance. Electroless nickel gives corrosion resistance and hardness without dimensional distortion. Phosphate coating (zinc phosphate) is used as a base for paint or oil-retention coating. Note: 12L14 and SUM24L contain lead \u2014 some plating facilities require special handling procedures, and certain plating processes may not be compatible. Always confirm with your surface treatment supplier. Anodizing is not applicable as these are steel, not aluminum.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What tolerances can you hold on free-machining steel turned parts?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Free-machining steels (1215, 12L14, SUM24L) are among the easiest materials to hold tight tolerances on because of their excellent chip control and consistent cutting behavior. Standard CNC turning tolerance is \u00b10.01 mm. For precision shaft and bore dimensions, we routinely hold \u00b10.005\u20130.008 mm. Surface finish of Ra 0.4\u20130.8 \u03bcm is achievable as-turned without additional finishing operations. These steels are particularly well-suited to high-volume bar-fed CNC turning where consistent tolerances across large quantities are required.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is 12L14 \/ SUM24L RoHS compliant?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"12L14 and SUM24L contain lead (0.15\u20130.35%) and are generally not RoHS compliant for use in electrical and electronic equipment (EEE) sold in the EU. RoHS Directive 2011\/65\/EU restricts lead content to 0.1% by weight in homogeneous materials for EEE. If your application requires RoHS compliance, specify 1215 (lead-free) or a bismuth-added free-machining steel (such as 12L14 Bi-substitute grades) which offer similar machinability without lead. Always verify the specific exemption or application scope with your compliance team before specifying.\"\n      }\n    }\n  ]\n}\n<\/script>\n\n<link rel=\"preconnect\" href=\"https:\/\/fonts.googleapis.com\">\n<link rel=\"preconnect\" href=\"https:\/\/fonts.gstatic.com\" crossorigin>\n<link href=\"https:\/\/fonts.googleapis.com\/css2?family=Roboto:wght@300;400;500;700;900&family=Roboto+Condensed:wght@400;700;900&family=Roboto+Mono:wght@400;500&display=swap\" rel=\"stylesheet\">\n\n<style>\n\/* \u2500\u2500 Namespace: .FMS \u2500\u2500 *\/\n.FMS{\n  --bg:#F7F9FC;--bg-white:#FFFFFF;--bg-light:#EEF3F8;\n  --text-1:#1F2937;--text-2:#5B6777;--text-3:#9CA8B4;\n  --border:#D7E0EA;\n  --blue:#2563EB;--blue-h:#1D4ED8;\n  --blue-dim:rgba(37,99,235,0.08);--blue-mid:rgba(37,99,235,0.15);\n  --teal:#0F766E;--teal-dim:rgba(15,118,110,0.08);--teal-border:rgba(15,118,110,0.2);\n  \/* Steel accent \u2014 slate gunmetal *\/\n  --stl:#374151;\n  --stl-mid:#1F2937;\n  --stl-dim:rgba(55,65,81,0.07);\n  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.fgc-1215:hover{border-color:var(--g1215);transform:translateY(-4px);box-shadow:0 14px 36px rgba(217,119,6,0.13);}\n.FMS .fgc-12l14{border:2px solid var(--g12l14-border);}\n.FMS .fgc-12l14:hover{border-color:var(--g12l14);transform:translateY(-4px);box-shadow:0 14px 36px rgba(37,99,235,0.12);}\n.FMS .fgc-sum{border:2px solid var(--gsum-border);}\n.FMS .fgc-sum:hover{border-color:var(--gsum);transform:translateY(-4px);box-shadow:0 14px 36px rgba(15,118,110,0.12);}\n\n.FMS .fgc-img{aspect-ratio:16\/8;overflow:hidden;position:relative;flex-shrink:0;}\n.FMS .fgc-img img{width:100%;height:100%;object-fit:cover;transition:transform 0.45s;}\n.FMS .fgc:hover .fgc-img img{transform:scale(1.04);}\n.FMS .fgc-badge{position:absolute;top:14px;left:14px;padding:6px 14px;border-radius:100px;font-family:var(--ff-m);font-size:11px;font-weight:700;letter-spacing:.8px;text-transform:uppercase;}\n.FMS .fgcb-1215{background:var(--g1215);color:#fff;}\n.FMS .fgcb-12l14{background:var(--g12l14);color:#fff;}\n.FMS .fgcb-sum{background:var(--gsum);color:#fff;}\n\n.FMS .fgc-body{padding:24px;display:flex;flex-direction:column;flex:1;}\n.FMS .fgc-grade{font-family:var(--ff-m);font-size:28px;font-weight:700;line-height:1;margin-bottom:4px;}\n.FMS .fgc-uns{font-family:var(--ff-m);font-size:10px;color:var(--text-3);letter-spacing:1.5px;text-transform:uppercase;margin-bottom:8px;}\n.FMS .fgc-name{font-family:var(--ff-h);font-size:14px;font-weight:700;color:var(--text-1);margin-bottom:10px;}\n.FMS .fgc-desc{font-size:12px;color:var(--text-2);line-height:1.72;margin-bottom:16px;}\n\n.FMS .fgc-stat-grid{display:grid;grid-template-columns:1fr 1fr;gap:7px;margin-bottom:16px;}\n.FMS .fgc-stat{padding:9px 11px;border-radius:var(--r2);text-align:center;}\n.FMS .fgs-1215{background:var(--g1215-dim);border:1px solid var(--g1215-border);}\n.FMS .fgs-12l14{background:var(--g12l14-dim);border:1px solid var(--g12l14-border);}\n.FMS .fgs-sum{background:var(--gsum-dim);border:1px solid var(--gsum-border);}\n.FMS .fgc-stat-val{font-family:var(--ff-h);font-size:15px;font-weight:900;line-height:1;margin-bottom:3px;}\n.FMS .fgc-stat-lbl{font-family:var(--ff-m);font-size:9px;color:var(--text-3);letter-spacing:1.2px;text-transform:uppercase;}\n\n.FMS .fgc-comp-title{font-family:var(--ff-m);font-size:10px;color:var(--text-3);letter-spacing:2px;text-transform:uppercase;margin-bottom:8px;margin-top:4px;}\n.FMS .fgc-comp-table{width:100%;border-collapse:collapse;margin-bottom:14px;}\n.FMS .fgc-comp-table tr{border-bottom:1px solid var(--border);}\n.FMS .fgc-comp-table tr:last-child{border-bottom:none;}\n.FMS .fgc-comp-table td{padding:5px 0;font-size:11px;}\n.FMS .fgc-comp-table td:first-child{color:var(--text-3);font-family:var(--ff-m);font-size:10px;letter-spacing:.8px;text-transform:uppercase;width:55%;}\n.FMS .fgc-comp-table td:last-child{font-weight:700;text-align:right;}\n\n.FMS .fgc-props{display:flex;flex-direction:column;gap:5px;margin-bottom:16px;}\n.FMS .fgc-prop{display:flex;align-items:flex-start;gap:7px;font-size:11px;color:var(--text-2);line-height:1.5;}\n.FMS .fgc-dot{width:5px;height:5px;border-radius:50%;flex-shrink:0;margin-top:4px;}\n.FMS .fgc-uses{display:flex;flex-wrap:wrap;gap:4px;margin-bottom:14px;}\n.FMS .fgc-use{padding:2px 8px;border-radius:100px;background:var(--bg-light);border:1px solid var(--border);font-family:var(--ff-m);font-size:10px;color:var(--text-3);}\n.FMS .fgc-link{display:inline-flex;align-items:center;gap:5px;font-family:var(--ff-h);font-size:11px;font-weight:700;letter-spacing:.5px;text-transform:uppercase;margin-top:auto;}\n.FMS .fgc-link::after{content:'\u2192';}\n.FMS .fgl-1215{color:var(--g1215);}\n.FMS .fgl-12l14{color:var(--g12l14);}\n.FMS .fgl-sum{color:var(--gsum);}\n\n\/* \u2500\u2500 RoHS notice \u2500\u2500 *\/\n.FMS .frohs-notice{display:flex;gap:10px;align-items:flex-start;padding:11px 14px;background:rgba(245,158,11,0.07);border:1px solid rgba(245,158,11,0.28);border-radius:var(--r2);font-size:12px;color:var(--text-2);line-height:1.6;margin-bottom:16px;}\n.FMS .frohs-ico{font-size:14px;flex-shrink:0;}\n\n\/* \u2500\u2500 WHEN TO USE EACH \u2500\u2500 *\/\n.FMS .fwhen-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;}\n@media(max-width:900px){.FMS .fwhen-grid{grid-template-columns:1fr;}}\n.FMS .fwhen-card{padding:22px;border-radius:var(--r3);border:1.5px solid var(--border);background:#fff;transition:all 0.2s;}\n.FMS .fwc-1215{border-color:var(--g1215-border);}\n.FMS .fwc-1215:hover{border-color:var(--g1215);box-shadow:0 8px 24px rgba(217,119,6,0.1);}\n.FMS .fwc-12l14{border-color:var(--g12l14-border);}\n.FMS .fwc-12l14:hover{border-color:var(--g12l14);box-shadow:0 8px 24px rgba(37,99,235,0.1);}\n.FMS .fwc-sum{border-color:var(--gsum-border);}\n.FMS .fwc-sum:hover{border-color:var(--gsum);box-shadow:0 8px 24px rgba(15,118,110,0.1);}\n.FMS .fwc-head{font-family:var(--ff-h);font-size:13px;font-weight:700;color:var(--text-1);margin-bottom:10px;display:flex;align-items:center;gap:8px;}\n.FMS .fwc-ico{width:24px;height:24px;border-radius:6px;display:flex;align-items:center;justify-content:center;font-size:12px;flex-shrink:0;}\n.FMS .fwc-list{display:flex;flex-direction:column;gap:5px;}\n.FMS .fwc-item{display:flex;align-items:flex-start;gap:6px;font-size:11px;color:var(--text-2);line-height:1.5;}\n\n\/* \u2500\u2500 COMPARISON TABLE \u2500\u2500 *\/\n.FMS .fcmp-wrap{overflow-x:auto;}\n.FMS .fcmp-table{width:100%;border-collapse:collapse;border:1.5px solid var(--border);border-radius:var(--r3);overflow:hidden;min-width:680px;}\n.FMS .fcmp-table thead th{padding:11px 14px;background:var(--bg-light);font-family:var(--ff-h);font-size:11px;font-weight:700;color:var(--text-3);letter-spacing:.5px;text-transform:uppercase;text-align:left;border-bottom:1.5px solid var(--border);}\n.FMS .fcmp-table thead th:nth-child(2){color:var(--g1215);}\n.FMS .fcmp-table thead th:nth-child(3){color:var(--g12l14);}\n.FMS .fcmp-table thead th:nth-child(4){color:var(--gsum);}\n.FMS .fcmp-table thead th:nth-child(5){color:var(--text-3);}\n.FMS .fcmp-table tbody td{padding:11px 14px;font-size:12px;color:var(--text-2);border-bottom:1px solid var(--border);vertical-align:top;}\n.FMS .fcmp-table tbody tr:last-child td{border-bottom:none;}\n.FMS .fcmp-table tbody tr:hover td{background:var(--bg-light);}\n.FMS .fcmp-table tbody td:first-child{font-family:var(--ff-m);font-size:10px;color:var(--text-3);letter-spacing:1px;text-transform:uppercase;white-space:nowrap;font-weight:500;}\n\n\/* Stars row *\/\n.FMS .fstars{display:inline-flex;gap:2px;}\n\n\/* \u2500\u2500 MACHINING NOTES \u2500\u2500 *\/\n.FMS .fmc-cols{display:grid;grid-template-columns:1fr 1fr;gap:20px;}\n@media(max-width:700px){.FMS .fmc-cols{grid-template-columns:1fr;}}\n.FMS .fmc-box{padding:24px;background:#fff;border:1.5px solid var(--border);border-radius:var(--r3);}\n.FMS .fmc-head{font-family:var(--ff-h);font-size:16px;font-weight:700;color:var(--text-1);margin-bottom:14px;display:flex;align-items:center;gap:10px;}\n.FMS .fmc-ico{width:32px;height:32px;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:13px;flex-shrink:0;}\n.FMS .fmc-ico-amber{background:rgba(217,119,6,0.1);}\n.FMS .fmc-ico-teal{background:var(--teal-dim);}\n.FMS .fmc-row{display:flex;gap:8px;align-items:flex-start;font-size:13px;color:var(--text-2);margin-bottom:10px;line-height:1.6;}\n.FMS .fmc-row:last-child{margin-bottom:0;}\n.FMS .fmc-dot-a{color:#D97706;font-weight:700;flex-shrink:0;}\n.FMS .fmc-dot-t{color:var(--teal);font-weight:700;flex-shrink:0;}\n.FMS .fmc-row strong{color:var(--text-1);font-weight:600;display:block;margin-bottom:2px;}\n\n\/* \u2500\u2500 CAPABILITIES \u2500\u2500 *\/\n.FMS .fcap-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;}\n@media(max-width:900px){.FMS .fcap-grid{grid-template-columns:1fr 1fr;}}\n@media(max-width:500px){.FMS .fcap-grid{grid-template-columns:1fr;}}\n.FMS .fcap-card{background:#fff;border:1.5px solid var(--border);border-radius:var(--r3);overflow:hidden;transition:all 0.22s;}\n.FMS .fcap-card:hover{border-color:var(--stl);transform:translateY(-3px);box-shadow:0 10px 28px rgba(55,65,81,0.1);}\n.FMS .fcc-img{aspect-ratio:16\/9;overflow:hidden;}\n.FMS .fcc-img img{width:100%;height:100%;object-fit:cover;transition:transform 0.4s;}\n.FMS .fcap-card:hover .fcc-img img{transform:scale(1.05);}\n.FMS .fcc-body{padding:18px;}\n.FMS .fcc-num{font-family:var(--ff-m);font-size:10px;color:var(--text-3);letter-spacing:2px;margin-bottom:8px;}\n.FMS .fcc-title{font-family:var(--ff-h);font-size:15px;font-weight:700;color:var(--text-1);margin-bottom:6px;}\n.FMS .fcc-desc{font-size:12px;color:var(--text-2);line-height:1.65;margin-bottom:10px;}\n.FMS .fcc-tags{display:flex;flex-wrap:wrap;gap:4px;}\n.FMS .fcct{padding:2px 8px;border-radius:100px;background:var(--bg-light);border:1px solid var(--border);font-family:var(--ff-m);font-size:10px;color:var(--text-3);}\n\n\/* \u2500\u2500 TYPICAL PARTS \u2500\u2500 *\/\n.FMS .fparts-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;}\n@media(max-width:800px){.FMS .fparts-grid{grid-template-columns:1fr 1fr;}}\n@media(max-width:500px){.FMS .fparts-grid{grid-template-columns:1fr;}}\n.FMS .fpart-card{background:#fff;border:1.5px solid var(--border);border-radius:var(--r3);overflow:hidden;transition:all 0.22s;cursor:pointer;}\n.FMS .fpart-card:hover{border-color:var(--stl);transform:translateY(-3px);box-shadow:0 10px 28px rgba(55,65,81,0.1);}\n.FMS .fpc-img{aspect-ratio:4\/3;overflow:hidden;position:relative;}\n.FMS .fpc-img img{width:100%;height:100%;object-fit:cover;transition:transform 0.45s;}\n.FMS .fpart-card:hover .fpc-img img{transform:scale(1.07);}\n.FMS .fpc-badge{position:absolute;top:10px;left:10px;padding:3px 10px;border-radius:100px;background:rgba(255,255,255,0.92);backdrop-filter:blur(4px);font-family:var(--ff-m);font-size:10px;font-weight:700;}\n.FMS .fpc-body{padding:16px;}\n.FMS .fpc-title{font-family:var(--ff-h);font-size:14px;font-weight:700;color:var(--text-1);margin-bottom:8px;}\n.FMS .fpc-row{display:flex;gap:8px;margin-bottom:4px;}\n.FMS .fpc-k{font-family:var(--ff-m);font-size:10px;min-width:52px;color:var(--text-3);}\n.FMS .fpc-v{font-size:12px;color:var(--text-2);}\n\n\/* \u2500\u2500 CASE STUDIES \u2500\u2500 *\/\n.FMS .fcase-list{display:flex;flex-direction:column;gap:28px;}\n.FMS .fcase-card{background:#fff;border:1.5px solid var(--border);border-radius:var(--r4);overflow:hidden;transition:all 0.25s;}\n.FMS .fcase-1215:hover{border-color:var(--g1215);box-shadow:0 12px 40px rgba(217,119,6,0.1);}\n.FMS .fcase-12l14:hover{border-color:var(--g12l14);box-shadow:0 12px 40px rgba(37,99,235,0.1);}\n.FMS .fcase-sum:hover{border-color:var(--gsum);box-shadow:0 12px 40px rgba(15,118,110,0.1);}\n.FMS .fcase-inner{display:grid;grid-template-columns:380px 1fr;}\n@media(max-width:900px){.FMS .fcase-inner{grid-template-columns:1fr;}}\n.FMS .fcase-inner.frev{direction:rtl;}\n.FMS .fcase-inner.frev>*{direction:ltr;}\n.FMS .fcase-imgs{display:flex;flex-direction:column;}\n.FMS .fci-main{flex:1;overflow:hidden;min-height:240px;}\n.FMS .fci-main img{width:100%;height:100%;object-fit:cover;transition:transform 0.4s;}\n.FMS .fcase-card:hover .fci-main img{transform:scale(1.04);}\n.FMS .fci-row{display:grid;grid-template-columns:1fr 1fr;border-top:3px solid #fff;}\n.FMS .fci-sm{overflow:hidden;aspect-ratio:4\/3;}\n.FMS .fci-sm img{width:100%;height:100%;object-fit:cover;}\n.FMS .fcase-body{padding:28px;display:flex;flex-direction:column;justify-content:center;}\n.FMS .fcase-num{font-family:var(--ff-m);font-size:10px;color:var(--text-3);letter-spacing:2px;text-transform:uppercase;margin-bottom:10px;}\n.FMS .fcase-title{font-family:var(--ff-h);font-size:19px;font-weight:700;color:var(--text-1);margin-bottom:12px;line-height:1.2;}\n.FMS .fcase-tags{display:flex;flex-wrap:wrap;gap:5px;margin-bottom:14px;}\n.FMS .fcase-row{display:grid;grid-template-columns:72px 1fr;gap:8px;margin-bottom:8px;align-items:start;}\n.FMS .fcr-k{font-family:var(--ff-m);font-size:10px;color:var(--text-3);letter-spacing:1px;text-transform:uppercase;padding-top:1px;}\n.FMS .fcr-v{font-size:13px;color:var(--text-2);line-height:1.6;}\n.FMS .fcr-v strong{color:var(--text-1);font-weight:600;}\n.FMS .fcase-outcome{padding:12px 14px;border-radius:var(--r2);font-size:13px;color:var(--text-2);line-height:1.65;margin:12px 0 16px;}\n.FMS .fco-1215{background:var(--g1215-dim);border:1px solid var(--g1215-border);}\n.FMS .fco-1215 strong{color:var(--g1215);}\n.FMS .fco-12l14{background:var(--g12l14-dim);border:1px solid var(--g12l14-border);}\n.FMS .fco-12l14 strong{color:var(--g12l14);}\n.FMS .fco-sum{background:var(--gsum-dim);border:1px solid var(--gsum-border);}\n.FMS .fco-sum strong{color:var(--gsum);}\n\n\/* \u2500\u2500 PROCESS FLOW \u2500\u2500 *\/\n.FMS .fflow-strip{display:grid;grid-template-columns:repeat(5,1fr);border:1.5px solid var(--border);border-radius:var(--r3);overflow:hidden;background:#fff;box-shadow:0 2px 12px rgba(31,41,55,0.05);}\n@media(max-width:768px){.FMS .fflow-strip{grid-template-columns:1fr 1fr;}}\n.FMS .fflow-step{border-right:1px solid var(--border);transition:background 0.18s;}\n.FMS .fflow-step:last-child{border-right:none;}\n.FMS .fflow-step:hover{background:var(--bg-light);}\n.FMS .ffs-img{aspect-ratio:4\/3;overflow:hidden;}\n.FMS .ffs-img img{width:100%;height:100%;object-fit:cover;transition:transform 0.4s;}\n.FMS .fflow-step:hover .ffs-img img{transform:scale(1.07);}\n.FMS .ffs-body{padding:16px;}\n.FMS .ffs-num{font-family:var(--ff-m);font-size:10px;color:var(--stl);letter-spacing:2px;font-weight:700;margin-bottom:7px;}\n.FMS .ffs-title{font-family:var(--ff-h);font-size:13px;font-weight:700;color:var(--text-1);margin-bottom:5px;}\n.FMS .ffs-desc{font-size:11px;color:var(--text-2);line-height:1.6;}\n\n\/* \u2500\u2500 SURFACE TREATMENTS \u2500\u2500 *\/\n.FMS .fsf-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;}\n@media(max-width:900px){.FMS .fsf-grid{grid-template-columns:1fr 1fr;}}\n.FMS .fsf-card{background:#fff;border:1.5px solid var(--border);border-radius:var(--r3);overflow:hidden;transition:all 0.22s;}\n.FMS .fsf-card:hover{border-color:var(--teal);transform:translateY(-2px);box-shadow:0 8px 24px rgba(15,118,110,0.1);}\n.FMS .fsf-img{aspect-ratio:4\/3;overflow:hidden;}\n.FMS .fsf-img img{width:100%;height:100%;object-fit:cover;transition:transform 0.4s;}\n.FMS .fsf-card:hover .fsf-img img{transform:scale(1.05);}\n.FMS .fsf-body{padding:16px;}\n.FMS .fsf-name{font-family:var(--ff-h);font-size:14px;font-weight:700;color:var(--text-1);margin-bottom:6px;}\n.FMS .fsf-desc{font-size:12px;color:var(--text-2);line-height:1.65;margin-bottom:10px;}\n.FMS .fsf-tags{display:flex;flex-wrap:wrap;gap:4px;}\n.FMS .fsft{padding:2px 8px;border-radius:100px;background:var(--teal-dim);border:1px solid var(--teal-border);font-family:var(--ff-m);font-size:10px;color:var(--teal);}\n\n\/* \u2500\u2500 METRICS \u2500\u2500 *\/\n.FMS .fmetrics{display:grid;grid-template-columns:repeat(4,1fr);background:var(--stl-mid);}\n@media(max-width:640px){.FMS .fmetrics{grid-template-columns:1fr 1fr;}}\n.FMS .fmetric{padding:36px 24px;text-align:center;border-right:1px solid rgba(255,255,255,0.15);}\n.FMS .fmetric:last-child{border-right:none;}\n.FMS .fmetric-val{font-family:var(--ff-h);font-size:36px;font-weight:900;color:#fff;line-height:1;}\n.FMS .fmetric-unit{font-size:15px;}\n.FMS .fmetric-lbl{font-family:var(--ff-m);font-size:10px;letter-spacing:2px;text-transform:uppercase;color:rgba(255,255,255,0.6);margin-top:8px;}\n\n\/* \u2500\u2500 WHY US \u2500\u2500 *\/\n.FMS .fwhy-layout{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;}\n@media(max-width:800px){.FMS .fwhy-layout{grid-template-columns:1fr;}}\n.FMS .fwhy-img{border-radius:var(--r3);overflow:hidden;aspect-ratio:4\/3;border:1px solid var(--border);box-shadow:0 4px 24px rgba(31,41,55,0.08);}\n.FMS .fwhy-img img{width:100%;height:100%;object-fit:cover;}\n.FMS .fwhy-points{display:flex;flex-direction:column;gap:14px;}\n.FMS .fwp-item{display:flex;gap:13px;align-items:flex-start;padding:16px;background:#fff;border:1.5px solid var(--border);border-radius:var(--r2);transition:all 0.2s;}\n.FMS .fwp-item:hover{border-color:var(--stl);}\n.FMS .fwp-ico{width:38px;height:38px;border-radius:10px;background:var(--stl-dim);border:1px solid var(--stl-border);display:flex;align-items:center;justify-content:center;font-family:var(--ff-m);font-size:11px;font-weight:700;color:var(--stl-mid);flex-shrink:0;}\n.FMS .fwp-title{font-family:var(--ff-h);font-size:14px;font-weight:700;color:var(--text-1);margin-bottom:4px;}\n.FMS .fwp-desc{font-size:12px;color:var(--text-2);line-height:1.65;}\n\n\/* \u2500\u2500 INDUSTRIES \u2500\u2500 *\/\n.FMS .find-row{display:grid;grid-template-columns:repeat(6,1fr);gap:12px;}\n@media(max-width:900px){.FMS .find-row{grid-template-columns:repeat(3,1fr);}}\n@media(max-width:480px){.FMS .find-row{grid-template-columns:1fr 1fr;}}\n.FMS .find-mini{padding:18px 12px;text-align:center;background:#fff;border:1.5px solid var(--border);border-radius:var(--r2);transition:all 0.2s;}\n.FMS .find-mini:hover{border-color:var(--stl);box-shadow:0 6px 18px rgba(55,65,81,0.09);}\n.FMS .fim-icon{font-size:22px;margin-bottom:8px;}\n.FMS .fim-name{font-family:var(--ff-h);font-size:13px;font-weight:700;color:var(--text-1);margin-bottom:3px;}\n.FMS .fim-grade{font-family:var(--ff-m);font-size:10px;color:var(--text-3);}\n\n\/* \u2500\u2500 FAQ \u2500\u2500 *\/\n.FMS .ffaq-layout{display:grid;grid-template-columns:1fr 2fr;gap:56px;align-items:start;}\n@media(max-width:800px){.FMS .ffaq-layout{grid-template-columns:1fr;}}\n.FMS .ffaq-list{border:1.5px solid var(--border);border-radius:var(--r3);overflow:hidden;}\n.FMS .ffaq-item{border-bottom:1px solid var(--border);}\n.FMS .ffaq-item:last-child{border-bottom:none;}\n.FMS .ffaq-q{width:100%;padding:17px 20px;background:none;border:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:14px;font-family:var(--ff-h);font-size:14px;font-weight:700;color:var(--text-1);text-align:left;transition:background 0.15s;}\n.FMS .ffaq-q:hover{background:var(--bg-light);}\n.FMS .ffaq-q.fopen{color:var(--stl-mid);background:var(--stl-dim);}\n.FMS .ffaq-icon{width:24px;height:24px;border-radius:50%;background:var(--bg-light);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;font-size:14px;flex-shrink:0;transition:all 0.2s;color:var(--text-2);}\n.FMS .ffaq-q.fopen .ffaq-icon{background:var(--stl-mid);border-color:var(--stl-mid);color:#fff;transform:rotate(45deg);}\n.FMS .ffaq-a{display:none;padding:0 20px 16px;font-size:13px;color:var(--text-2);line-height:1.75;}\n.FMS .ffaq-a.fopen{display:block;}\n\n\/* \u2500\u2500 CTA \u2500\u2500 *\/\n.FMS .fcta{position:relative;padding:96px 0;overflow:hidden;}\n.FMS .fcta-bg{position:absolute;inset:0;}\n.FMS .fcta-bg img{width:100%;height:100%;object-fit:cover;filter:brightness(0.2);}\n.FMS .fcta-overlay{position:absolute;inset:0;background:linear-gradient(135deg,rgba(31,41,55,0.92),rgba(55,65,81,0.7));}\n.FMS .fcta-dots{position:absolute;inset:0;background-image:radial-gradient(circle,rgba(255,255,255,0.09) 1px,transparent 1px);background-size:24px 24px;}\n.FMS .fcta-inner{position:relative;z-index:2;text-align:center;}\n.FMS .fcta-lbl{display:inline-flex;align-items:center;gap:8px;font-family:var(--ff-m);font-size:11px;font-weight:500;letter-spacing:3px;text-transform:uppercase;color:rgba(255,255,255,0.6);margin-bottom:14px;justify-content:center;}\n.FMS .fcta-h2{font-family:var(--ff-h);font-size:clamp(26px,3.5vw,50px);font-weight:700;color:#fff;margin-bottom:14px;line-height:1.1;}\n.FMS .fcta-sub{font-size:16px;color:rgba(255,255,255,0.75);margin-bottom:34px;max-width:540px;margin-left:auto;margin-right:auto;line-height:1.75;}\n.FMS .fcta-btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;}\n<\/style>\n\n<div class=\"FMS\">\n<!-- BREADCRUMB -->\n<div class=\"fbreadcrumb\">\n  <div class=\"fwrap\">\n    <div class=\"fbc-inner\">\n      <a href=\"\/\">Home<\/a><span class=\"fbc-sep\">\/<\/span>\n      <a href=\"\/material\/\">Materials<\/a><span class=\"fbc-sep\">\/<\/span>\n      <span class=\"fbc-current\">Free-Machining Steel \u2014 1215 \u00b7 12L14 \u00b7 SUM24L<\/span>\n    <\/div>\n  <\/div>\n<\/div>\n\n\n<!-- \u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\n     1. HERO\n\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550 -->\n<section class=\"fhero\">\n  <div class=\"fhero-dot\"><\/div>\n  <div class=\"fwrap\">\n    <div class=\"fhero-inner\">\n      <div>\n        <div class=\"flabel\">Free-Machining Steel CNC<\/div>\n        <h1 class=\"fhero-h1\">Free-Machining<br><span style=\"color:var(--stl-mid);\">Steel Machining<\/span><\/h1>\n        <div class=\"fhero-kicker\">\n          <span class=\"fhk-pill\"><span class=\"fhk-dot\" style=\"background:var(--g1215);\"><\/span>1215 \u2014 Lead-Free<\/span>\n          <span class=\"fhk-pill\"><span class=\"fhk-dot\" style=\"background:var(--g12l14);\"><\/span>12L14 \u2014 Highest Machinability<\/span>\n          <span class=\"fhk-pill\"><span class=\"fhk-dot\" style=\"background:var(--gsum);\"><\/span>SUM24L \u2014 JIS Equivalent<\/span>\n          <span class=\"fhk-pill\"><span class=\"fhk-dot\" style=\"background:var(--stl);\"><\/span>High-Volume Bar-Fed Turning<\/span>\n          <span class=\"fhk-pill\"><span class=\"fhk-dot\" style=\"background:var(--stl);\"><\/span>Fittings \u00b7 Fasteners \u00b7 Connectors<\/span>\n        <\/div>\n        <p class=\"fhero-sub\">Precision CNC turning of 1215, 12L14, and SUM24L free-machining steels for high-volume production of fittings, fasteners, connectors, shafts, and precision turned components where fast cycle times, excellent surface finish, and consistent tolerances are critical.<\/p>\n        <div class=\"fhero-btns\">\n          <a href=\"#fquote\" class=\"fbtn fbtn-primary\">Get a Quote \u2192<\/a>\n          <a href=\"#fquote\" class=\"fbtn fbtn-outline\">Send Your Drawing<\/a>\n        <\/div>\n      <\/div>\n\n      <div class=\"fhero-imgs\">\n        <div class=\"fhi-main\">\n          <img decoding=\"async\" src=\"https:\/\/hxcnc.com\/wp-content\/uploads\/2026\/04\/Free-Cutting-Steel.jpg\" alt=\"Free-Machining Steel 1215 12L14 SUM24L CNC Turned Parts Fittings\">\n        <\/div>\n        <div class=\"fhi-badge\">\n          <div class=\"fhib-l\">Machinability<\/div>\n          <div class=\"fhib-v\">170%<\/div>\n        <\/div>\n\n      <\/div>\n    <\/div>\n\n    <div class=\"fhero-bar\">\n      <div class=\"fhbar-item\"><div class=\"fhbar-v\">1215 \/ 12L14 \/ SUM24L<\/div><div class=\"fhbar-l\">Three Grades in Stock<\/div><\/div>\n      <div class=\"fhbar-item\"><div class=\"fhbar-v\">170%<\/div><div class=\"fhbar-l\">12L14 Machinability Rating<\/div><\/div>\n      <div class=\"fhbar-item\"><div class=\"fhbar-v\">\u00b10.005<span style=\"font-size:13px\">mm<\/span><\/div><div class=\"fhbar-v\" style=\"font-size:13px;margin-bottom:0;\"><\/div><div class=\"fhbar-l\">Precision Tolerance<\/div><\/div>\n      <div class=\"fhbar-item\"><div class=\"fhbar-v\">24hr<\/div><div class=\"fhbar-l\">Quote Turnaround<\/div><\/div>\n    <\/div>\n  <\/div>\n<\/section>\n\n<!-- TICKER -->\n<div class=\"fticker\">\n  <div class=\"ftick-track\">\n    <span class=\"ftick-item\">AISI 1215 Lead-Free <span class=\"ft-1215\">\u2726<\/span><\/span>\n    <span class=\"ftick-item\">12L14 Leaded \u2014 170% Machinability <span class=\"ft-12l14\">\u2726<\/span><\/span>\n    <span class=\"ftick-item\">SUM24L JIS G4804 <span class=\"ft-sum\">\u2726<\/span><\/span>\n    <span class=\"ftick-item\">Bar-Fed CNC Turning <span class=\"ft-1215\">\u2726<\/span><\/span>\n    <span class=\"ftick-item\">Hydraulic Fittings &amp; Connectors <span class=\"ft-12l14\">\u2726<\/span><\/span>\n    <span class=\"ftick-item\">High-Volume Precision Fasteners <span class=\"ft-sum\">\u2726<\/span><\/span>\n    <span class=\"ftick-item\">Threaded Shafts &amp; Studs <span class=\"ft-1215\">\u2726<\/span><\/span>\n    <span class=\"ftick-item\">Short Chip \u00b7 Low Tool Wear \u00b7 Fast Cycle <span class=\"ft-12l14\">\u2726<\/span><\/span>\n    <span class=\"ftick-item\">AISI 1215 Lead-Free <span class=\"ft-1215\">\u2726<\/span><\/span>\n    <span class=\"ftick-item\">12L14 Leaded \u2014 170% Machinability <span class=\"ft-12l14\">\u2726<\/span><\/span>\n    <span class=\"ftick-item\">SUM24L JIS G4804 <span class=\"ft-sum\">\u2726<\/span><\/span>\n    <span class=\"ftick-item\">Bar-Fed CNC Turning <span class=\"ft-1215\">\u2726<\/span><\/span>\n    <span class=\"ftick-item\">Hydraulic Fittings &amp; Connectors <span class=\"ft-12l14\">\u2726<\/span><\/span>\n    <span class=\"ftick-item\">High-Volume Precision Fasteners <span class=\"ft-sum\">\u2726<\/span><\/span>\n    <span class=\"ftick-item\">Threaded Shafts &amp; Studs <span class=\"ft-1215\">\u2726<\/span><\/span>\n    <span class=\"ftick-item\">Short Chip \u00b7 Low Tool Wear \u00b7 Fast Cycle <span class=\"ft-12l14\">\u2726<\/span><\/span>\n  <\/div>\n<\/div>\n\n\n<!-- \u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\n     2. GRADE CARDS (3-up)\n\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550 -->\n<section class=\"fsec fsec-white\">\n  <div class=\"fwrap\">\n    <div class=\"fsec-head\">\n      <div>\n        <div class=\"flabel\">Material Grades<\/div>\n        <h2 class=\"fh2\">Three Free-Machining Grades, <span style=\"color:var(--stl-mid);\">One Priority: Speed &amp; Finish<\/span><\/h2>\n      <\/div>\n    <\/div>\n\n    <div class=\"fgrade-grid\">\n\n      <!-- 1215 -->\n      <div class=\"fgc fgc-1215\">\n        \n        <div class=\"fgc-body\">\n          <div class=\"fgc-grade c1215\">1215<\/div>\n          <div class=\"fgc-uns\">AISI 1215 \u00b7 UNS G12150 \u00b7 EN 11SMnPb30 (similar)<\/div>\n          <div class=\"fgc-name\">Resulfurized &amp; Rephosphorized Free-Machining Steel<\/div>\n          <div class=\"fgc-desc\">The most widely used non-leaded free-machining steel. Elevated sulfur and phosphorus additions promote short, broken chips and reduce cutting forces \u2014 giving a machinability rating of approximately 136% relative to AISI B1112. Produces excellent surface finishes at high cutting speeds. The lead-free choice for applications where RoHS or environmental regulations prohibit leaded steel, without significantly sacrificing machinability versus 12L14.<\/div>\n          <div class=\"fgc-stat-grid\">\n            <div class=\"fgc-stat fgs-1215\"><div class=\"fgc-stat-val c1215\">136%<\/div><div class=\"fgc-stat-lbl\">Machinability<\/div><\/div>\n            <div class=\"fgc-stat fgs-1215\"><div class=\"fgc-stat-val c1215\">~380 MPa<\/div><div class=\"fgc-stat-lbl\">Tensile Strength<\/div><\/div>\n            <div class=\"fgc-stat fgs-1215\"><div class=\"fgc-stat-val c1215\">Ra 0.4\u03bcm<\/div><div class=\"fgc-stat-lbl\">Surface Finish<\/div><\/div>\n            <div class=\"fgc-stat fgs-1215\"><div class=\"fgc-stat-val c1215\">HRB 72<\/div><div class=\"fgc-stat-lbl\">Hardness<\/div><\/div>\n          <\/div>\n          <div class=\"fgc-comp-title\">Chemical Composition<\/div>\n          <table class=\"fgc-comp-table\">\n            <tr><td>Carbon (C)<\/td><td class=\"c1215\">0.09% max<\/td><\/tr>\n            <tr><td>Manganese (Mn)<\/td><td class=\"c1215\">0.75\u20131.05%<\/td><\/tr>\n            <tr><td>Phosphorus (P)<\/td><td class=\"c1215\">0.04\u20130.09%<\/td><\/tr>\n            <tr><td>Sulfur (S)<\/td><td class=\"c1215\">0.26\u20130.35%<\/td><\/tr>\n            <tr><td>Lead (Pb)<\/td><td class=\"c1215\">None \u2014 Lead-Free<\/td><\/tr>\n          <\/table>\n          <div class=\"fgc-props\">\n            <div class=\"fgc-prop\"><span class=\"fgc-dot\" style=\"background:var(--g1215);\"><\/span>RoHS compliant \u2014 no lead content<\/div>\n            <div class=\"fgc-prop\"><span class=\"fgc-dot\" style=\"background:var(--g1215);\"><\/span>Excellent surface finish in as-turned condition<\/div>\n            <div class=\"fgc-prop\"><span class=\"fgc-dot\" style=\"background:var(--g1215);\"><\/span>Not weldable \u2014 sulfur causes hot cracking<\/div>\n            <div class=\"fgc-prop\"><span class=\"fgc-dot\" style=\"background:var(--g1215);\"><\/span>Not heat-treatable to useful strength levels<\/div>\n          <\/div>\n          <div class=\"fgc-uses\"><span class=\"fgc-use\">Hydraulic Fittings<\/span><span class=\"fgc-use\">Couplings<\/span><span class=\"fgc-use\">Threaded Studs<\/span><span class=\"fgc-use\">Connectors<\/span><\/div>\n          <span class=\"fgc-link fgl-1215\">View 1215 Details<\/span>\n        <\/div>\n      <\/div>\n\n      <!-- 12L14 -->\n      <div class=\"fgc fgc-12l14\">\n        \n        <div class=\"fgc-body\">\n          <div class=\"fgc-grade c12l14\">12L14<\/div>\n          <div class=\"fgc-uns\">AISI 12L14 \u00b7 UNS G12144 \u00b7 EN 11SMnPb37 (similar)<\/div>\n          <div class=\"fgc-name\">Leaded Resulfurized Free-Machining Steel \u2014 170% Rating<\/div>\n          <div class=\"fgc-desc\">The most machinable steel grade commercially available. Lead additions (0.15\u20130.35%) to the 1215 base composition act as internal lubricants at the cutting interface \u2014 reducing friction, tool wear, and cutting temperatures. 12L14 achieves a machinability rating of 170% relative to AISI B1112, enabling significantly higher cutting speeds and longer tool life than any other steel. The preferred choice for high-volume bar-fed CNC turning where cycle time reduction directly impacts per-part cost.<\/div>\n          <div class=\"fgc-stat-grid\">\n            <div class=\"fgc-stat fgs-12l14\"><div class=\"fgc-stat-val c12l14\">170%<\/div><div class=\"fgc-stat-lbl\">Machinability<\/div><\/div>\n            <div class=\"fgc-stat fgs-12l14\"><div class=\"fgc-stat-val c12l14\">~395 MPa<\/div><div class=\"fgc-stat-lbl\">Tensile Strength<\/div><\/div>\n            <div class=\"fgc-stat fgs-12l14\"><div class=\"fgc-stat-val c12l14\">Ra 0.4\u03bcm<\/div><div class=\"fgc-stat-lbl\">Surface Finish<\/div><\/div>\n            <div class=\"fgc-stat fgs-12l14\"><div class=\"fgc-stat-val c12l14\">HRB 80<\/div><div class=\"fgc-stat-lbl\">Hardness<\/div><\/div>\n          <\/div>\n          <div class=\"frohs-notice\">\n            <span class=\"frohs-ico\">\u26a0<\/span>\n            <span>12L14 contains lead (0.15\u20130.35%) \u2014 generally not RoHS compliant for EEE applications. Specify 1215 for lead-free \/ RoHS-required applications.<\/span>\n          <\/div>\n          <div class=\"fgc-comp-title\">Chemical Composition<\/div>\n          <table class=\"fgc-comp-table\">\n            <tr><td>Carbon (C)<\/td><td class=\"c12l14\">0.15% max<\/td><\/tr>\n            <tr><td>Manganese (Mn)<\/td><td class=\"c12l14\">0.85\u20131.15%<\/td><\/tr>\n            <tr><td>Phosphorus (P)<\/td><td class=\"c12l14\">0.04\u20130.09%<\/td><\/tr>\n            <tr><td>Sulfur (S)<\/td><td class=\"c12l14\">0.26\u20130.35%<\/td><\/tr>\n            <tr><td>Lead (Pb)<\/td><td class=\"c12l14\">0.15\u20130.35%<\/td><\/tr>\n          <\/table>\n          <div class=\"fgc-props\">\n            <div class=\"fgc-prop\"><span class=\"fgc-dot\" style=\"background:var(--g12l14);\"><\/span>Highest machinability of any commercially available steel<\/div>\n            <div class=\"fgc-prop\"><span class=\"fgc-dot\" style=\"background:var(--g12l14);\"><\/span>Outstanding surface finish \u2014 ideal for plated or polished parts<\/div>\n            <div class=\"fgc-prop\"><span class=\"fgc-dot\" style=\"background:var(--g12l14);\"><\/span>Lead content: verify RoHS \/ REACH compliance for your application<\/div>\n            <div class=\"fgc-prop\"><span class=\"fgc-dot\" style=\"background:var(--g12l14);\"><\/span>Not suitable for welding or heat treatment<\/div>\n          <\/div>\n          <div class=\"fgc-uses\"><span class=\"fgc-use\">Precision Fasteners<\/span><span class=\"fgc-use\">Instrument Parts<\/span><span class=\"fgc-use\">Valve Stems<\/span><span class=\"fgc-use\">Bushings<\/span><\/div>\n          <span class=\"fgc-link fgl-12l14\">View 12L14 Details<\/span>\n        <\/div>\n      <\/div>\n\n      <!-- SUM24L -->\n      <div class=\"fgc fgc-sum\">\n        \n        <div class=\"fgc-body\">\n          <div class=\"fgc-grade csum\">SUM24L<\/div>\n          <div class=\"fgc-uns\">JIS G 4804 SUM24L \u00b7 Equivalent to AISI 12L14<\/div>\n          <div class=\"fgc-name\">JIS Leaded Free-Machining Steel \u2014 Japanese Standard<\/div>\n          <div class=\"fgc-desc\">SUM24L is the Japanese Industrial Standard (JIS G 4804) designation for a leaded resulfurized free-machining steel essentially equivalent to AISI 12L14. The \"L\" suffix in both designations denotes lead content. SUM24L is the dominant free-machining steel grade in Japanese and East Asian manufacturing \u2014 specified on Japanese OEM drawings, automotive sub-assembly drawings, and precision machinery components produced by Japanese companies globally. Machinability and performance are functionally equivalent to 12L14; material certifications reference JIS G 4804.<\/div>\n          <div class=\"fgc-stat-grid\">\n            <div class=\"fgc-stat fgs-sum\"><div class=\"fgc-stat-val csum\">\u2248170%<\/div><div class=\"fgc-stat-lbl\">Machinability<\/div><\/div>\n            <div class=\"fgc-stat fgs-sum\"><div class=\"fgc-stat-val csum\">~390 MPa<\/div><div class=\"fgc-stat-lbl\">Tensile Strength<\/div><\/div>\n            <div class=\"fgc-stat fgs-sum\"><div class=\"fgc-stat-val csum\">Ra 0.4\u03bcm<\/div><div class=\"fgc-stat-lbl\">Surface Finish<\/div><\/div>\n            <div class=\"fgc-stat fgs-sum\"><div class=\"fgc-stat-val csum\">HRB 78<\/div><div class=\"fgc-stat-lbl\">Hardness<\/div><\/div>\n          <\/div>\n          <div class=\"frohs-notice\">\n            <span class=\"frohs-ico\">\u26a0<\/span>\n            <span>SUM24L contains lead \u2014 same RoHS considerations as 12L14 apply. Verify compliance before specifying in EU EEE applications.<\/span>\n          <\/div>\n          <div class=\"fgc-comp-title\">Chemical Composition (JIS G 4804)<\/div>\n          <table class=\"fgc-comp-table\">\n            <tr><td>Carbon (C)<\/td><td class=\"csum\">0.15% max<\/td><\/tr>\n            <tr><td>Manganese (Mn)<\/td><td class=\"csum\">0.85\u20131.15%<\/td><\/tr>\n            <tr><td>Phosphorus (P)<\/td><td class=\"csum\">0.04\u20130.09%<\/td><\/tr>\n            <tr><td>Sulfur (S)<\/td><td class=\"csum\">0.26\u20130.35%<\/td><\/tr>\n            <tr><td>Lead (Pb)<\/td><td class=\"csum\">0.10\u20130.35%<\/td><\/tr>\n          <\/table>\n          <div class=\"fgc-props\">\n            <div class=\"fgc-prop\"><span class=\"fgc-dot\" style=\"background:var(--gsum);\"><\/span>JIS G 4804 certified \u2014 accepted on Japanese OEM drawings<\/div>\n            <div class=\"fgc-prop\"><span class=\"fgc-dot\" style=\"background:var(--gsum);\"><\/span>Functionally equivalent to 12L14 \u2014 interchangeable in most applications<\/div>\n            <div class=\"fgc-prop\"><span class=\"fgc-dot\" style=\"background:var(--gsum);\"><\/span>Preferred for Japanese automotive and precision machinery supply chains<\/div>\n            <div class=\"fgc-prop\"><span class=\"fgc-dot\" style=\"background:var(--gsum);\"><\/span>Lead content: same RoHS considerations as 12L14<\/div>\n          <\/div>\n          <div class=\"fgc-uses\"><span class=\"fgc-use\">Auto Components<\/span><span class=\"fgc-use\">Precision Parts<\/span><span class=\"fgc-use\">Shafts<\/span><span class=\"fgc-use\">Connectors<\/span><\/div>\n          <span class=\"fgc-link fgl-sum\">View SUM24L Details<\/span>\n        <\/div>\n      <\/div>\n\n    <\/div>\n\n    <!-- Grade selection -->\n    <div style=\"margin-top:28px;\">\n      <div class=\"fsec-head\" style=\"margin-bottom:20px;\">\n        <div>\n          <div class=\"flabel\">Grade Selection Guide<\/div>\n          <h2 class=\"fh2\">Choosing the Right <span style=\"color:var(--stl-mid);\">Free-Machining Grade<\/span><\/h2>\n        <\/div>\n      <\/div>\n      <div class=\"fwhen-grid\">\n        <div class=\"fwhen-card fwc-1215\">\n          <div class=\"fwc-head\"><div class=\"fwc-ico\" style=\"background:var(--g1215-dim);\">\u2699<\/div><span class=\"c1215\">Choose 1215 when\u2026<\/span><\/div>\n          <div class=\"fwc-list\">\n            <div class=\"fwc-item\"><span style=\"color:var(--g1215);font-weight:700;\">\u2713<\/span>RoHS \/ REACH compliance is required (lead-free)<\/div>\n            <div class=\"fwc-item\"><span style=\"color:var(--g1215);font-weight:700;\">\u2713<\/span>Hydraulic fittings, couplings, and fluid connectors<\/div>\n            <div class=\"fwc-item\"><span style=\"color:var(--g1215);font-weight:700;\">\u2713<\/span>Food, pharmaceutical, or drinking water contact parts<\/div>\n            <div class=\"fwc-item\"><span style=\"color:var(--g1215);font-weight:700;\">\u2713<\/span>EU \/ EEE applications where leaded steel is prohibited<\/div>\n            <div class=\"fwc-item\"><span style=\"color:var(--g1215);font-weight:700;\">\u2713<\/span>General high-volume turning where RoHS is a concern<\/div>\n          <\/div>\n        <\/div>\n        <div class=\"fwhen-card fwc-12l14\">\n          <div class=\"fwc-head\"><div class=\"fwc-ico\" style=\"background:var(--g12l14-dim);\">\u2605<\/div><span class=\"c12l14\">Choose 12L14 when\u2026<\/span><\/div>\n          <div class=\"fwc-list\">\n            <div class=\"fwc-item\"><span style=\"color:var(--g12l14);font-weight:700;\">\u2713<\/span>Maximum machinability and shortest cycle time required<\/div>\n            <div class=\"fwc-item\"><span style=\"color:var(--g12l14);font-weight:700;\">\u2713<\/span>High-volume bar-fed production \u2014 cost per piece is critical<\/div>\n            <div class=\"fwc-item\"><span style=\"color:var(--g12l14);font-weight:700;\">\u2713<\/span>Very fine surface finish required as-turned (Ra \u2264 0.4 \u03bcm)<\/div>\n            <div class=\"fwc-item\"><span style=\"color:var(--g12l14);font-weight:700;\">\u2713<\/span>Fasteners, valve stems, instrument bodies, precision shafts<\/div>\n            <div class=\"fwc-item\"><span style=\"color:var(--g12l14);font-weight:700;\">\u2713<\/span>RoHS does not apply to your application<\/div>\n          <\/div>\n        <\/div>\n        <div class=\"fwhen-card fwc-sum\">\n          <div class=\"fwc-head\"><div class=\"fwc-ico\" style=\"background:var(--gsum-dim);\">\u25ce<\/div><span class=\"csum\">Choose SUM24L when\u2026<\/span><\/div>\n          <div class=\"fwc-list\">\n            <div class=\"fwc-item\"><span style=\"color:var(--gsum);font-weight:700;\">\u2713<\/span>Drawing specifies JIS G 4804 SUM24L standard<\/div>\n            <div class=\"fwc-item\"><span style=\"color:var(--gsum);font-weight:700;\">\u2713<\/span>Japanese OEM or automotive supply chain requirement<\/div>\n            <div class=\"fwc-item\"><span style=\"color:var(--gsum);font-weight:700;\">\u2713<\/span>Customer requires JIS-certified material test reports<\/div>\n            <div class=\"fwc-item\"><span style=\"color:var(--gsum);font-weight:700;\">\u2713<\/span>East Asian manufacturing specification \u2014 JIS over AISI<\/div>\n            <div class=\"fwc-item\"><span style=\"color:var(--gsum);font-weight:700;\">\u2713<\/span>Performance requirement is the same as 12L14<\/div>\n          <\/div>\n        <\/div>\n      <\/div>\n    <\/div>\n\n  <\/div>\n<\/section>\n\n\n<!-- \u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\n     3. COMPARISON TABLE\n\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550 -->\n<section class=\"fsec fsec-light\">\n  <div class=\"fwrap\">\n    <div class=\"fsec-head\">\n      <div>\n        <div class=\"flabel\">Material Comparison<\/div>\n        <h2 class=\"fh2\">Full Property Comparison \u2014 <span class=\"fblue\">1215 vs 12L14 vs SUM24L<\/span><\/h2>\n      <\/div>\n    <\/div>\n    <div class=\"fcmp-wrap\">\n      <table class=\"fcmp-table\">\n        <thead>\n          <tr>\n            <th>Property<\/th>\n            <th>1215<\/th>\n            <th>12L14<\/th>\n            <th>SUM24L<\/th>\n            <th>1018 Steel (ref)<\/th>\n          <\/tr>\n        <\/thead>\n        <tbody>\n          <tr>\n            <td>Standard<\/td>\n            <td>AISI \/ UNS G12150<\/td>\n            <td>AISI \/ UNS G12144<\/td>\n            <td>JIS G 4804<\/td>\n            <td>AISI 1018<\/td>\n          <\/tr>\n          <tr>\n            <td>Machinability Rating<\/td>\n            <td><span class=\"badge-1215\">136% \u2014 Excellent<\/span><\/td>\n            <td><span class=\"badge-12l14\">170% \u2014 Best in class<\/span><\/td>\n            <td><span class=\"badge-sum\">\u2248170% \u2014 Equivalent to 12L14<\/span><\/td>\n            <td>78% (reference)<\/td>\n          <\/tr>\n          <tr>\n            <td>Tensile Strength<\/td>\n            <td>~380 MPa<\/td>\n            <td>~395 MPa<\/td>\n            <td>~390 MPa<\/td>\n            <td>~440 MPa<\/td>\n          <\/tr>\n          <tr>\n            <td>Lead Content<\/td>\n            <td><span class=\"badge-ok\">None \u2014 Lead-Free<\/span><\/td>\n            <td><span class=\"badge-warn\">0.15\u20130.35% Pb<\/span><\/td>\n            <td><span class=\"badge-warn\">0.10\u20130.35% Pb<\/span><\/td>\n            <td><span class=\"badge-ok\">None<\/span><\/td>\n          <\/tr>\n          <tr>\n            <td>RoHS (EEE)<\/td>\n            <td><span class=\"badge-ok\">Compliant<\/span><\/td>\n            <td><span class=\"badge-no\">Not compliant<\/span><\/td>\n            <td><span class=\"badge-no\">Not compliant<\/span><\/td>\n            <td><span class=\"badge-ok\">Compliant<\/span><\/td>\n          <\/tr>\n          <tr>\n            <td>Surface Finish (as-turned)<\/td>\n            <td><span class=\"fstars star-1215\">\u2605\u2605\u2605\u2605<\/span> Ra 0.4\u20130.8 \u03bcm<\/td>\n            <td><span class=\"fstars star-12l14\">\u2605\u2605\u2605\u2605\u2605<\/span> Ra 0.4 \u03bcm<\/td>\n            <td><span class=\"fstars star-sum\">\u2605\u2605\u2605\u2605\u2605<\/span> Ra 0.4 \u03bcm<\/td>\n            <td><span class=\"fstars\" style=\"color:var(--stl);\">\u2605\u2605\u2605<\/span> Ra 0.8\u20131.6 \u03bcm<\/td>\n          <\/tr>\n          <tr>\n            <td>Weldability<\/td>\n            <td><span class=\"badge-no\">Not recommended<\/span><\/td>\n            <td><span class=\"badge-no\">Not recommended<\/span><\/td>\n            <td><span class=\"badge-no\">Not recommended<\/span><\/td>\n            <td><span class=\"badge-ok\">Good<\/span><\/td>\n          <\/tr>\n          <tr>\n            <td>Heat Treatment<\/td>\n            <td><span class=\"badge-warn\">Case harden only<\/span><\/td>\n            <td><span class=\"badge-warn\">Case harden only<\/span><\/td>\n            <td><span class=\"badge-warn\">Case harden only<\/span><\/td>\n            <td><span class=\"badge-ok\">Full range<\/span><\/td>\n          <\/tr>\n          <tr>\n            <td>Chip Control<\/td>\n            <td>Short, broken chips<\/td>\n            <td><span class=\"badge-12l14\">Best \u2014 short powder chips<\/span><\/td>\n            <td><span class=\"badge-sum\">Best \u2014 equivalent to 12L14<\/span><\/td>\n            <td>Long stringy chips<\/td>\n          <\/tr>\n          <tr>\n            <td>Primary Application<\/td>\n            <td>RoHS fittings, couplings, fluid connectors<\/td>\n            <td>Max-speed turned parts, fasteners, instrument bodies<\/td>\n            <td>Japanese OEM parts, JIS-spec components<\/td>\n            <td>Structural, weldable, general machining<\/td>\n          <\/tr>\n        <\/tbody>\n      <\/table>\n    <\/div>\n  <\/div>\n<\/section>\n\n\n<!-- \u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\n     4. MACHINING NOTES\n\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550 -->\n<section class=\"fsec fsec-white\">\n  <div class=\"fwrap\">\n    <div class=\"fsec-head\">\n      <div>\n        <div class=\"flabel\">Machining Notes<\/div>\n        <h2 class=\"fh2\">Machining Free-Machining Steel \u2014 <span style=\"color:var(--stl-mid);\">Key Considerations<\/span><\/h2>\n      <\/div>\n    <\/div>\n    <div class=\"fmc-cols\">\n      <div class=\"fmc-box\">\n        <div class=\"fmc-head\"><div class=\"fmc-ico fmc-ico-amber\">\u26a0<\/div>Points to Watch<\/div>\n        <div class=\"fmc-row\"><span class=\"fmc-dot-a\">!<\/span><div><strong>Lead content in 12L14 and SUM24L \u2014 occupational health<\/strong>Both 12L14 and SUM24L produce fine lead-containing chips and mist during machining. Machining operations must be conducted with adequate ventilation and coolant flood \u2014 and chip disposal must comply with local regulations for lead-containing metallic waste. This is standard practice for any facility regularly machining leaded steel.<\/div><\/div>\n        <div class=\"fmc-row\"><span class=\"fmc-dot-a\">!<\/span><div><strong>Not for welding \u2014 sulfur causes hot cracking<\/strong>All three grades contain elevated sulfur (0.26\u20130.35%). Sulfur forms low-melting iron sulfide phases at grain boundaries, causing hot cracking in the weld heat-affected zone. Any design that requires welding at any stage must switch to 1018 or 1045 standard carbon steel.<\/div><\/div>\n        <div class=\"fmc-row\"><span class=\"fmc-dot-a\">!<\/span><div><strong>Limited surface hardness via heat treatment<\/strong>The low carbon content of 1215, 12L14, and SUM24L (\u22640.15% C) means through-hardening by quench and temper is not achievable. Light case hardening (gas or pack carburizing) is possible but results in a shallow case depth (0.1\u20130.3 mm) \u2014 not suitable for heavy wear applications. Specify 1045 or 4140 if hardness after machining is required.<\/div><\/div>\n        <div class=\"fmc-row\"><span class=\"fmc-dot-a\">!<\/span><div><strong>Dimensional growth during plating \u2014 account for coating thickness on bores<\/strong>When zinc plating or electroless nickel is specified, bore diameters decrease by the plating deposit thickness (typically 5\u201325 \u03bcm per side). Drawing bore dimensions must be specified as pre-plate to avoid tight fits after plating. We confirm pre-plate vs post-plate dimension intent with every order requiring surface treatment.<\/div><\/div>\n      <\/div>\n      <div class=\"fmc-box\">\n        <div class=\"fmc-head\"><div class=\"fmc-ico fmc-ico-teal\">\u2713<\/div>Why These Grades Excel in Production<\/div>\n        <div class=\"fmc-row\"><span class=\"fmc-dot-t\">\u2713<\/span><div><strong>170% machinability = 40\u201370% faster cycle times vs standard carbon steel<\/strong>12L14 and SUM24L allow cutting speeds 40\u201370% higher than 1018 or 1045 \u2014 directly translating to shorter cycle times and lower per-part cost in high-volume bar-fed turning. For 10,000+ piece production runs, this difference significantly impacts cost competitiveness.<\/div><\/div>\n        <div class=\"fmc-row\"><span class=\"fmc-dot-t\">\u2713<\/span><div><strong>Short chip control eliminates chip nesting in deep bores and threading<\/strong>The powder-like chips produced by 12L14 and SUM24L clear automatically from deep bores and threaded features \u2014 unlike the long stringy chips of standard carbon steels that must be broken by peck drilling cycles. This enables faster threading and cross-hole drilling without chip clearance issues.<\/div><\/div>\n        <div class=\"fmc-row\"><span class=\"fmc-dot-t\">\u2713<\/span><div><strong>Excellent surface finish as-turned \u2014 no secondary finishing required<\/strong>Ra 0.4 \u03bcm is routinely achieved on 12L14 and SUM24L in as-turned condition without superfinishing, grinding, or polishing operations. For plated parts, this eliminates the pre-plate polishing step often required on standard carbon steel turned components.<\/div><\/div>\n        <div class=\"fmc-row\"><span class=\"fmc-dot-t\">\u2713<\/span><div><strong>Consistent dimensional accuracy across large production quantities<\/strong>The predictable chip formation and low cutting forces in free-machining steels produce excellent dimensional consistency across production runs \u2014 reducing inspection burden and rework rate on high-volume orders. Tool life is longer and more predictable, minimising mid-run adjustments.<\/div><\/div>\n      <\/div>\n    <\/div>\n  <\/div>\n<\/section>\n\n\n<!-- \u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\n     5. CAPABILITIES\n\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550 -->\n<section class=\"fsec fsec-light\">\n  <div class=\"fwrap\">\n    <div class=\"fsec-head\">\n      <div>\n        <div class=\"flabel\">Manufacturing Capability<\/div>\n        <h2 class=\"fh2\">How We Machine <span style=\"color:var(--stl-mid);\">Free-Machining Steel Parts<\/span><\/h2>\n      <\/div>\n    <\/div>\n    <div class=\"fcap-grid\">\n\n      <div class=\"fcap-card\">\n        <div class=\"fcc-img\"><img decoding=\"async\" src=\"https:\/\/hxcnc.com\/wp-content\/uploads\/2026\/04\/CNC-Turning-Service.webp\" alt=\"Bar-Fed CNC Turning 1215 12L14 SUM24L Fittings Connectors\"><\/div>\n        <div class=\"fcc-body\">\n          <div class=\"fcc-num\">PROCESS \/ 01<\/div>\n          <div class=\"fcc-title\">Bar-Fed CNC Turning \u2014 High-Volume<\/div>\n          <div class=\"fcc-desc\">High-volume CNC turning of 1215, 12L14, and SUM24L from bar stock. Continuous bar-fed production with automatic part ejection enables rapid cycle times and consistent dimensional tolerances across thousands of pieces per shift. Ideal for fittings, connectors, shafts, and fastener bodies.<\/div>\n          <div class=\"fcc-tags\"><span class=\"fcct\">All 3 Grades<\/span><span class=\"fcct\">Bar-Fed<\/span><span class=\"fcct\">High Volume<\/span><span class=\"fcct\">Auto Ejection<\/span><\/div>\n        <\/div>\n      <\/div>\n\n      <div class=\"fcap-card\">\n        <div class=\"fcc-img\"><img decoding=\"async\" src=\"https:\/\/hxcnc.com\/wp-content\/uploads\/2026\/04\/Custom-CNC-Milling.jpg\" alt=\"CNC Milling Drilling Cross-Holes Free-Machining Steel Parts\"><\/div>\n        <div class=\"fcc-body\">\n          <div class=\"fcc-num\">PROCESS \/ 02<\/div>\n          <div class=\"fcc-title\">Milling, Cross-Holes &amp; Flats<\/div>\n          <div class=\"fcc-desc\">Secondary milling operations for flats, hex features, cross-holes, slots, and keyways on turned parts \u2014 all in one setup where possible. Short-chip behavior of free-machining steels clears cross-holes automatically, enabling fast cycle times even on multi-feature components.<\/div>\n          <div class=\"fcc-tags\"><span class=\"fcct\">Cross-Holes<\/span><span class=\"fcct\">Flats<\/span><span class=\"fcct\">Keyways<\/span><span class=\"fcct\">Hex Features<\/span><\/div>\n        <\/div>\n      <\/div>\n\n      <div class=\"fcap-card\">\n        <div class=\"fcc-img\"><img decoding=\"async\" src=\"https:\/\/hxcnc.com\/wp-content\/uploads\/2026\/04\/Rapid-Prototyping-scaled.webp\" alt=\"Prototype to Volume Production Free-Machining Steel 1215 12L14\"><\/div>\n        <div class=\"fcc-body\">\n          <div class=\"fcc-num\">PROCESS \/ 03<\/div>\n          <div class=\"fcc-title\">Prototype to Volume \u2014 No Minimum Order<\/div>\n          <div class=\"fcc-desc\">Single-piece prototypes for design validation through to 50,000+ piece production orders. Free-machining steels are particularly economical at volume \u2014 fast cycle times, low tool consumption, and consistent quality from piece 1 to piece 50,000. Same quality system from prototype through production.<\/div>\n          <div class=\"fcc-tags\"><span class=\"fcct\">1 pc Prototype<\/span><span class=\"fcct\">50k+ Volume<\/span><span class=\"fcct\">No MOQ<\/span><\/div>\n        <\/div>\n      <\/div>\n\n    <\/div>\n  <\/div>\n<\/section>\n\n\n<!-- \u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\n     6. TYPICAL PARTS\n\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550 -->\n<section class=\"fsec fsec-white\">\n  <div class=\"fwrap\">\n    <div class=\"fsec-head\">\n      <div>\n        <div class=\"flabel\">Application Gallery<\/div>\n        <h2 class=\"fh2\">Typical Parts <span style=\"color:var(--stl-mid);\">We Produce<\/span><\/h2>\n      <\/div>\n    <\/div>\n    <div class=\"fparts-grid\">\n\n      <div class=\"fpart-card\">\n        <div class=\"fpc-img\">\n          <img decoding=\"async\" src=\"https:\/\/hxcnc.com\/wp-content\/uploads\/2026\/04\/Hydraulic-Fittings-Couplings.webp\" alt=\"1215 Hydraulic Fittings CNC Turned\">\n          <span class=\"fpc-badge c1215\">1215<\/span>\n        <\/div>\n        <div class=\"fpc-body\">\n          <div class=\"fpc-title\">Hydraulic Fittings &amp; Couplings<\/div>\n          <div class=\"fpc-row\"><span class=\"fpc-k\">Material<\/span><span class=\"fpc-v\">1215 \u2014 lead-free, RoHS compliant<\/span><\/div>\n          <div class=\"fpc-row\"><span class=\"fpc-k\">Process<\/span><span class=\"fpc-v\">Bar-Fed Turning \u00b7 BSP\/NPT Threads<\/span><\/div>\n          <div class=\"fpc-row\"><span class=\"fpc-k\">Industry<\/span><span class=\"fpc-v\">Hydraulics \u00b7 Pneumatics \u00b7 Fluid Power<\/span><\/div>\n        <\/div>\n      <\/div>\n\n      <div class=\"fpart-card\">\n        <div class=\"fpc-img\">\n          <img decoding=\"async\" src=\"https:\/\/hxcnc.com\/wp-content\/uploads\/2026\/04\/Precision-Fasteners.jpg\" alt=\"12L14 Precision Fasteners Studs CNC Turned\">\n          <span class=\"fpc-badge c12l14\">12L14<\/span>\n        <\/div>\n        <div class=\"fpc-body\">\n          <div class=\"fpc-title\">Precision Fasteners &amp; Threaded Studs<\/div>\n          <div class=\"fpc-row\"><span class=\"fpc-k\">Material<\/span><span class=\"fpc-v\">12L14 \u2014 highest machinability<\/span><\/div>\n          <div class=\"fpc-row\"><span class=\"fpc-k\">Process<\/span><span class=\"fpc-v\">CNC Turning \u00b7 Thread Rolling \/ Cutting<\/span><\/div>\n          <div class=\"fpc-row\"><span class=\"fpc-k\">Industry<\/span><span class=\"fpc-v\">Automotive \u00b7 Machinery \u00b7 Electronics<\/span><\/div>\n        <\/div>\n      <\/div>\n      <div class=\"fpart-card\">\n        <div class=\"fpc-img\">\n          <img decoding=\"async\" src=\"https:\/\/hxcnc.com\/wp-content\/uploads\/2026\/04\/3-Axis-4-Axis-and-5-Axis-CNC-milling-2.jpg\" alt=\"SUM24L Instrument Part Precision Turned Japan\">\n          <span class=\"fpc-badge csum\">SUM24L<\/span>\n        <\/div>\n        <div class=\"fpc-body\">\n          <div class=\"fpc-title\">Precision Instrument Components<\/div>\n          <div class=\"fpc-row\"><span class=\"fpc-k\">Material<\/span><span class=\"fpc-v\">SUM24L \u2014 JIS spec, fine finish<\/span><\/div>\n          <div class=\"fpc-row\"><span class=\"fpc-k\">Process<\/span><span class=\"fpc-v\">CNC Turning \u00b7 Fine Finish \u00b7 Zinc Plate<\/span><\/div>\n          <div class=\"fpc-row\"><span class=\"fpc-k\">Industry<\/span><span class=\"fpc-v\">Instruments \u00b7 Sensors \u00b7 Automation<\/span><\/div>\n        <\/div>\n      <\/div>\n\n    <\/div>\n  <\/div>\n<\/section>\n\n\n<!-- \u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\n     7. INDUSTRIES\n\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550 -->\n<section class=\"fsec fsec-light\">\n  <div class=\"fwrap\">\n    <div style=\"text-align:center;margin-bottom:40px;\">\n      <div class=\"flabel\" style=\"justify-content:center;\">Industries Served<\/div>\n      <h2 class=\"fh2\">Where Free-Machining Steel <span style=\"color:var(--stl-mid);\">Dominates Production<\/span><\/h2>\n    <\/div>\n    <div class=\"find-row\">\n      <div class=\"find-mini\"><div class=\"fim-icon\">\ud83d\udd27<\/div><div class=\"fim-name\">Hydraulics<\/div><div class=\"fim-grade\">1215 fittings<\/div><\/div>\n      <div class=\"find-mini\"><div class=\"fim-icon\">\ud83d\ude97<\/div><div class=\"fim-name\">Automotive<\/div><div class=\"fim-grade\">12L14 \/ SUM24L<\/div><\/div>\n      <div class=\"find-mini\"><div class=\"fim-icon\">\u26a1<\/div><div class=\"fim-name\">Electronics<\/div><div class=\"fim-grade\">1215 (RoHS)<\/div><\/div>\n      <div class=\"find-mini\"><div class=\"fim-icon\">\ud83d\udd29<\/div><div class=\"fim-name\">Fasteners<\/div><div class=\"fim-grade\">12L14<\/div><\/div>\n      <div class=\"find-mini\"><div class=\"fim-icon\">\ud83c\udfed<\/div><div class=\"fim-name\">Machinery<\/div><div class=\"fim-grade\">All 3 grades<\/div><\/div>\n      <div class=\"find-mini\"><div class=\"fim-icon\">\ud83d\udd2c<\/div><div class=\"fim-name\">Instruments<\/div><div class=\"fim-grade\">SUM24L \/ 12L14<\/div><\/div>\n    <\/div>\n  <\/div>\n<\/section>\n\n\n<!-- \u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\n     9. PROCESS FLOW\n\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550 -->\n<section class=\"fsec fsec-light\">\n  <div class=\"fwrap\">\n    <div style=\"text-align:center;margin-bottom:48px;\">\n      <div class=\"flabel\" style=\"justify-content:center;\">From Bar Stock to Finished Part<\/div>\n      <h2 class=\"fh2\">How We Produce <span style=\"color:var(--stl-mid);\">Free-Machining Steel Parts<\/span><\/h2>\n    <\/div>\n    <div class=\"fflow-strip\">\n      <div class=\"fflow-step\">\n        <div class=\"ffs-body\">\n          <div class=\"ffs-num\">STEP 01<\/div>\n          <div class=\"ffs-title\">Bar Stock Selection<\/div>\n          <div class=\"ffs-desc\">1215, 12L14, or SUM24L bar loaded to bar feeder. Material certificate verified. Grade, OD, and straightness confirmed before production release.<\/div>\n        <\/div>\n      <\/div>\n      <div class=\"fflow-step\">\n        <div class=\"ffs-body\">\n          <div class=\"ffs-num\">STEP 02<\/div>\n          <div class=\"ffs-title\">CNC Turning<\/div>\n          <div class=\"ffs-desc\">Bar-fed CNC turning at optimised speeds. Short powder chips self-clear \u2014 no peck cycles needed. Threading, grooving, and knurling completed in one clamping.<\/div>\n        <\/div>\n      <\/div>\n      <div class=\"fflow-step\">\n        <div class=\"ffs-body\">\n          <div class=\"ffs-num\">STEP 03<\/div>\n          <div class=\"ffs-title\">Secondary Operations<\/div>\n          <div class=\"ffs-desc\">Cross-holes, flats, keyways, and hex features milled or drilled as required. Deburring and edge break completed before inspection.<\/div>\n        <\/div>\n      <\/div>\n      <div class=\"fflow-step\">\n        <div class=\"ffs-body\">\n          <div class=\"ffs-num\">STEP 04<\/div>\n          <div class=\"ffs-title\">Surface Treatment<\/div>\n          <div class=\"ffs-desc\">Zinc plating, electroless nickel, black oxide, or phosphate as specified. Pre-plate vs post-plate dimension intent confirmed before treatment. Plating thickness verified.<\/div>\n        <\/div>\n      <\/div>\n      <div class=\"fflow-step\">\n        <div class=\"ffs-body\">\n          <div class=\"ffs-num\">STEP 05<\/div>\n          <div class=\"ffs-title\">Inspection &amp; Delivery<\/div>\n          <div class=\"ffs-desc\">Dimensional gauge, thread gauge (go\/no-go), surface finish check. CMM report, material certificate, and PPAP (if required) shipped with order.<\/div>\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/div>\n<\/section>\n\n\n<!-- \u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\n     10. SURFACE TREATMENTS\n\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550 -->\n<section class=\"fsec fsec-white\">\n  <div class=\"fwrap\">\n    <div class=\"fsec-head\">\n      <div>\n        <div class=\"flabel\">Post-Processing<\/div>\n        <h2 class=\"fh2\">Surface Treatments for <span class=\"fteal\">Free-Machining Steel Parts<\/span><\/h2>\n      <\/div>\n    <\/div>\n    <p style=\"font-size:14px;color:var(--text-2);line-height:1.75;max-width:720px;margin-bottom:32px;\">Free-machining steels have no inherent corrosion resistance \u2014 surface treatment is required for any part exposed to moisture or corrosive environments. The excellent as-turned surface finish of these materials ensures uniform coating adhesion and appearance.<\/p>\n    <div class=\"fsf-grid\">\n      <div class=\"fsf-card\">\n        <div class=\"fsf-body\">\n          <div class=\"fsf-name\">Zinc Electroplating<\/div>\n          <div class=\"fsf-desc\">The most common finish for free-machining steel turned parts. Bright zinc (5\u201315 \u03bcm) provides good corrosion protection, a uniform silver appearance, and low cost. Blue, yellow, or black chromate passivation available for additional protection. Pre-plate bore dimensions calculated to ensure post-plate fit.<\/div>\n          <div class=\"fsf-tags\"><span class=\"fsft\">All 3 Grades<\/span><span class=\"fsft\">5\u201315 \u03bcm<\/span><span class=\"fsft\">RoHS Chromate<\/span><\/div>\n        <\/div>\n      <\/div>\n      <div class=\"fsf-card\">\n        <div class=\"fsf-body\">\n          <div class=\"fsf-name\">Electroless Nickel<\/div>\n          <div class=\"fsf-desc\">Uniform nickel-phosphorus deposit (10\u201350 \u03bcm) for corrosion resistance, wear resistance, and a bright appearance. Dimensional increase is consistent and predictable \u2014 critical for precision bore and shaft diameters. Used on valve stems, precision shafts, and instrument parts requiring uniform coating on complex geometries.<\/div>\n          <div class=\"fsf-tags\"><span class=\"fsft\">All 3 Grades<\/span><span class=\"fsft\">10\u201350 \u03bcm<\/span><span class=\"fsft\">Wear Resistant<\/span><\/div>\n        <\/div>\n      <\/div>\n      <div class=\"fsf-card\">\n        <div class=\"fsf-body\">\n          <div class=\"fsf-name\">Black Oxide &amp; Phosphate<\/div>\n          <div class=\"fsf-desc\">Black oxide conversion coating provides a uniform black appearance with minimal dimensional change (&lt;1 \u03bcm). Zinc phosphate (Parkerizing) produces a porous coating ideal as a base for paint or oil retention. Both are used on internal machine components, hydraulic parts, and fasteners where a low-gloss black appearance is required.<\/div>\n          <div class=\"fsf-tags\"><span class=\"fsft\">All 3 Grades<\/span><span class=\"fsft\">&lt;1 \u03bcm Dim. Change<\/span><span class=\"fsft\">Low Cost<\/span><\/div>\n        <\/div>\n      <\/div>\n      <div class=\"fsf-card\">\n        <div class=\"fsf-body\">\n          <div class=\"fsf-name\">Tin Plating &amp; Nickel-Tin<\/div>\n          <div class=\"fsf-desc\">Bright tin (5\u201315 \u03bcm) for solderable finish and light corrosion protection on connector bodies and electrical contact components. RoHS-compliant. Nickel-tin duplex coating (nickel undercoat + tin topcoat) for improved solderability and corrosion barrier on precision instrument and connector parts.<\/div>\n          <div class=\"fsf-tags\"><span class=\"fsft\">1215 (RoHS)<\/span><span class=\"fsft\">Solderable<\/span><span class=\"fsft\">Connectors<\/span><\/div>\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/div>\n<\/section>\n\n\n<!-- METRICS BAR -->\n<div class=\"fmetrics\">\n  <div class=\"fmetric\"><div class=\"fmetric-val\">170<span class=\"fmetric-unit\">%<\/span><\/div><div class=\"fmetric-lbl\">12L14 Machinability Rating<\/div><\/div>\n  <div class=\"fmetric\"><div class=\"fmetric-val\">\u00b10.005<span class=\"fmetric-unit\">mm<\/span><\/div><div class=\"fmetric-lbl\">Precision Tolerance<\/div><\/div>\n  <div class=\"fmetric\"><div class=\"fmetric-val\">Ra 0.4<span class=\"fmetric-unit\">\u03bcm<\/span><\/div><div class=\"fmetric-lbl\">As-Turned Surface Finish<\/div><\/div>\n  <div class=\"fmetric\"><div class=\"fmetric-val\">24<span class=\"fmetric-unit\">hr<\/span><\/div><div class=\"fmetric-lbl\">Quote Turnaround<\/div><\/div>\n<\/div>\n\n\n<!-- \u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\n     11. WHY US\n\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550 -->\n<section class=\"fsec fsec-white\">\n  <div class=\"fwrap\">\n    <div class=\"fwhy-layout\">\n      <div class=\"fwhy-img\">\n        <img decoding=\"async\" src=\"https:\/\/hxcnc.com\/wp-content\/uploads\/2026\/04\/Technical-Specifications.jpg\" alt=\"Free-Machining Steel CNC Turning Production Bar-Fed\">\n      <\/div>\n      <div>\n        <div class=\"flabel\">Why Work With Us<\/div>\n        <h2 class=\"fh2\" style=\"margin-bottom:24px;\">Why Choose Us for <span style=\"color:var(--stl-mid);\">Free-Machining Steel Turning<\/span><\/h2>\n        <div class=\"fwhy-points\">\n          <div class=\"fwp-item\">\n            <div class=\"fwp-ico\">VOL<\/div>\n            <div>\n              <div class=\"fwp-title\">High-Volume Bar-Fed Turning Expertise<\/div>\n              <div class=\"fwp-desc\">1215, 12L14, and SUM24L are our highest-volume turning materials. Dedicated bar feeders, optimised cycle programs, and tooling change schedules keep cost-per-piece competitive from 1,000 to 500,000 pieces per month.<\/div>\n            <\/div>\n          <\/div>\n          <div class=\"fwp-item\">\n            <div class=\"fwp-ico\">PLT<\/div>\n            <div>\n              <div class=\"fwp-title\">Pre-Plate Dimension Calculation \u2014 No Post-Plate Surprises<\/div>\n              <div class=\"fwp-desc\">We calculate pre-plate dimensions for every plated bore and shaft feature \u2014 accounting for zinc, electroless nickel, or tin deposit thickness. Confirmed on first article before production release. Eliminates the most common high-volume rejection cause.<\/div>\n            <\/div>\n          <\/div>\n          <div class=\"fwp-item\">\n            <div class=\"fwp-ico\">JIS<\/div>\n            <div>\n              <div class=\"fwp-title\">SUM24L with JIS G 4804 Certification \u2014 Japanese OEM Ready<\/div>\n              <div class=\"fwp-desc\">We stock SUM24L with JIS G 4804 material certificates. Japanese OEM drawings that specify SUM24L are quoted and supplied with the correct JIS documentation \u2014 no material substitution without drawing approval.<\/div>\n            <\/div>\n          <\/div>\n          <div class=\"fwp-item\">\n            <div class=\"fwp-ico\">RoHS<\/div>\n            <div>\n              <div class=\"fwp-title\">Grade Advisory \u2014 1215 vs 12L14 vs SUM24L<\/div>\n              <div class=\"fwp-desc\">We advise on grade selection before quoting. If your application requires RoHS compliance, we will flag 12L14\/SUM24L lead content and recommend 1215. We never substitute grades without explicit customer approval.<\/div>\n            <\/div>\n          <\/div>\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/div>\n<\/section>\n\n\n<!-- \u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\n     FAQ\n\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550 -->\n<section class=\"fsec fsec-light\">\n  <div class=\"fwrap\">\n    <div class=\"ffaq-layout\">\n      <div>\n        <div class=\"flabel\">FAQ<\/div>\n        <h2 class=\"fh2\">Frequently Asked <span class=\"fblue\">Questions<\/span><\/h2>\n        <p style=\"font-size:14px;color:var(--text-2);line-height:1.75;margin-top:16px;\">Common questions about 1215, 12L14, and SUM24L free-machining steels \u2014 grade selection, machinability, RoHS compliance, surface treatment, and tolerances.<\/p>\n        <div style=\"margin-top:28px;display:flex;flex-direction:column;gap:10px;\">\n          <a href=\"#fquote\" class=\"fbtn fbtn-primary fbtn-sm\">Talk to an Engineer<\/a>\n        <\/div>\n      <\/div>\n\n      <div class=\"ffaq-list\" itemscope itemtype=\"https:\/\/schema.org\/FAQPage\">\n\n        <div class=\"ffaq-item\" itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\">\n          <button class=\"ffaq-q\" onclick=\"fmsfaq(this)\" itemprop=\"name\">What is free-machining steel and why is it used for CNC machining?<span class=\"ffaq-icon\">+<\/span><\/button>\n          <div class=\"ffaq-a\" itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\">\n            <div itemprop=\"text\">Free-machining steels (also called free-cutting steels) are carbon steels with deliberate additions of sulfur, lead, phosphorus, or bismuth that improve machinability by promoting short, broken chips and reducing cutting forces. They are used in CNC machining when high production volume, fast cycle times, and excellent surface finish are more important than maximum mechanical strength or weldability. Common grades include 1215 (sulfur + phosphorus), 12L14 (leaded, the most machinable), and SUM24L (Japanese JIS standard equivalent to 12L14). Free-machining steels machine at speeds 100\u2013150% faster than standard carbon steels, significantly reducing per-part cost in high-volume production.<\/div>\n          <\/div>\n        <\/div>\n\n        <div class=\"ffaq-item\" itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\">\n          <button class=\"ffaq-q\" onclick=\"fmsfaq(this)\" itemprop=\"name\">What is 1215 steel and what are its main applications?<span class=\"ffaq-icon\">+<\/span><\/button>\n          <div class=\"ffaq-a\" itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\">\n            <div itemprop=\"text\">1215 (AISI 1215, UNS G12150) is the highest-machinability non-leaded free-machining steel, containing elevated sulfur (0.26\u20130.35%) and phosphorus (0.04\u20130.09%) to produce short chips and reduce tool wear. It achieves a machinability rating of approximately 136% relative to AISI B1112. 1215 is used for high-volume turned components, hydraulic fittings, couplings, threaded rod, studs, and precision shafts where fast cycle times and excellent surface finish are required. It is not suitable for welding, heat treatment, or applications requiring significant ductility.<\/div>\n          <\/div>\n        <\/div>\n\n        <div class=\"ffaq-item\" itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\">\n          <button class=\"ffaq-q\" onclick=\"fmsfaq(this)\" itemprop=\"name\">What is 12L14 steel and how does it compare to 1215?<span class=\"ffaq-icon\">+<\/span><\/button>\n          <div class=\"ffaq-a\" itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\">\n            <div itemprop=\"text\">12L14 (AISI 12L14, UNS G12144) is a leaded free-machining steel \u2014 the addition of lead (0.15\u20130.35%) to the 1215 base composition gives it a machinability rating of approximately 170% relative to AISI B1112, making it the most machinable steel grade commercially available. Lead inclusions act as internal lubricants during cutting, reducing friction, tool wear, and cutting temperatures. 12L14 produces excellent surface finishes on high-speed CNC lathes and is used for precision components, instrument parts, fasteners, fittings, and bushings. Note: 12L14 contains lead and is subject to RoHS and REACH regulations \u2014 verify compliance before specifying in consumer or food-contact applications.<\/div>\n          <\/div>\n        <\/div>\n\n        <div class=\"ffaq-item\" itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\">\n          <button class=\"ffaq-q\" onclick=\"fmsfaq(this)\" itemprop=\"name\">What is SUM24L and how does it relate to 12L14?<span class=\"ffaq-icon\">+<\/span><\/button>\n          <div class=\"ffaq-a\" itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\">\n            <div itemprop=\"text\">SUM24L is the Japanese JIS G 4804 standard designation for a free-machining steel equivalent to AISI 12L14. It is a leaded resulfurized carbon steel with composition and machinability very close to 12L14 \u2014 the 'L' suffix in both designations denotes lead content. SUM24L is the predominant free-machining steel grade in Japanese and East Asian manufacturing specifications, while 12L14 is the North American designation for the same alloy family. Both are interchangeable for most CNC turning and precision component applications.<\/div>\n          <\/div>\n        <\/div>\n\n        <div class=\"ffaq-item\" itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\">\n          <button class=\"ffaq-q\" onclick=\"fmsfaq(this)\" itemprop=\"name\">Can free-machining steels be heat treated or welded?<span class=\"ffaq-icon\">+<\/span><\/button>\n          <div class=\"ffaq-a\" itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\">\n            <div itemprop=\"text\">Free-machining steels (1215, 12L14, SUM24L) have very limited heat treatment and welding capability. They cannot be effectively case-hardened or through-hardened to useful strength levels due to their low carbon content and sulfur\/lead additions. Welding is not recommended \u2014 sulfur and lead inclusions cause hot cracking and porosity in the weld zone, and lead vaporizes during welding producing toxic fumes. If heat treatment or welding is required, specify a standard carbon steel (1018, 1045) or alloy steel instead. Free-machining steels are optimized purely for machining speed and surface finish.<\/div>\n          <\/div>\n        <\/div>\n\n        <div class=\"ffaq-item\" itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\">\n          <button class=\"ffaq-q\" onclick=\"fmsfaq(this)\" itemprop=\"name\">What surface treatments are compatible with free-machining steels?<span class=\"ffaq-icon\">+<\/span><\/button>\n          <div class=\"ffaq-a\" itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\">\n            <div itemprop=\"text\">Free-machining steels (1215, 12L14, SUM24L) accept most standard surface treatments including zinc electroplating (most common), electroless nickel, black oxide, phosphate coating, and tin plating. Note that 12L14 and SUM24L contain lead \u2014 some plating facilities require special handling, and certain plating processes may not be compatible. Pre-plate bore and shaft dimensions must be calculated to account for coating thickness so that post-plate fits are correct. Always confirm with your surface treatment supplier regarding lead-containing base metals.<\/div>\n          <\/div>\n        <\/div>\n\n        <div class=\"ffaq-item\" itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\">\n          <button class=\"ffaq-q\" onclick=\"fmsfaq(this)\" itemprop=\"name\">What tolerances can you hold on free-machining steel turned parts?<span class=\"ffaq-icon\">+<\/span><\/button>\n          <div class=\"ffaq-a\" itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\">\n            <div itemprop=\"text\">Free-machining steels are among the easiest materials to hold tight tolerances on because of their excellent chip control and consistent cutting behavior. Standard CNC turning tolerance is \u00b10.01 mm. For precision shaft and bore dimensions, we routinely hold \u00b10.005\u20130.008 mm. Surface finish of Ra 0.4\u20130.8 \u03bcm is achievable as-turned without additional finishing operations. These steels are particularly well-suited to high-volume bar-fed CNC turning where consistent tolerances across large quantities are required.<\/div>\n          <\/div>\n        <\/div>\n\n        <div class=\"ffaq-item\" itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\">\n          <button class=\"ffaq-q\" onclick=\"fmsfaq(this)\" itemprop=\"name\">Is 12L14 \/ SUM24L RoHS compliant?<span class=\"ffaq-icon\">+<\/span><\/button>\n          <div class=\"ffaq-a\" itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\">\n            <div itemprop=\"text\">12L14 and SUM24L contain lead (0.15\u20130.35%) and are generally not RoHS compliant for use in electrical and electronic equipment (EEE) sold in the EU. RoHS Directive 2011\/65\/EU restricts lead content to 0.1% by weight in homogeneous materials for EEE. If your application requires RoHS compliance, specify 1215 (lead-free) instead. 1215 offers similar machinability (136% vs 170%) without lead. Always verify the specific exemption or application scope with your compliance team before specifying leaded steel.<\/div>\n          <\/div>\n        <\/div>\n\n      <\/div>\n    <\/div>\n  <\/div>\n<\/section>\n\n<\/div><!-- end .FMS -->\n\n<script>\nfunction fmsfaq(btn){\n  var open = btn.classList.contains('fopen');\n  document.querySelectorAll('.FMS .ffaq-q').forEach(function(b){\n    b.classList.remove('fopen');\n    var a = b.nextElementSibling;\n    if(a) a.classList.remove('fopen');\n  });\n  if(!open){\n    btn.classList.add('fopen');\n    var a = btn.nextElementSibling;\n    if(a) a.classList.add('fopen');\n  }\n}\n<\/script>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-520ee74b e-con-full fquote e-flex e-con e-parent\" data-id=\"520ee74b\" data-element_type=\"container\" data-e-type=\"container\" id=\"fquote\">\n\t\t<div class=\"elementor-element elementor-element-146fed86 e-con-full e-flex e-con e-child\" data-id=\"146fed86\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6f2b71db elementor-widget elementor-widget-html\" data-id=\"6f2b71db\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t\t<!-- HXCNC CTA Left Panel | namespace .HXCL | Elementor HTML Widget -->\n<link rel=\"preconnect\" href=\"https:\/\/fonts.googleapis.com\">\n<link rel=\"preconnect\" href=\"https:\/\/fonts.gstatic.com\" crossorigin>\n<link href=\"https:\/\/fonts.googleapis.com\/css2?family=Roboto:wght@300;400;500;700;900&family=Roboto+Condensed:wght@400;700;900&family=Roboto+Mono:wght@400;500&display=swap\" rel=\"stylesheet\">\n<style>\n.HXCL{\n  --bg:#F7F9FC;--wh:#FFFFFF;--lt:#EEF3F8;\n  --tx:#1F2937;--tx1:#5B6777;--tx2:#9CA8B4;--bd:#D7E0EA;\n  --a:#2563EB;--a2:#1D4ED8;--aA:rgba(37,99,235,.07);--aC:rgba(37,99,235,.20);\n  --ac:#0F766E;--acA:rgba(15,118,110,.08);--acB:rgba(15,118,110,.15);--acC:rgba(15,118,110,.22);\n  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 display:flex;align-items:center;justify-content:center;font-size:15px;\n  transition:background .18s;\n}\n.HXCL .avitem:hover .ico{background:var(--acB);}\n.HXCL .avitem .at{\n  font-family:var(--fh);font-size:14px;font-weight:700;\n  color:var(--tx);margin-bottom:2px;line-height:1.2;\n}\n.HXCL .avitem .ad{\n  font-size:12px;color:var(--tx1);line-height:1.62;\n}\n\n\/* \u2500\u2500 CERT TAGS \u2500\u2500 *\/\n.HXCL .certs{\n  display:flex;flex-wrap:wrap;gap:7px;\n  padding-top:20px;border-top:1.5px solid var(--bd);\n}\n.HXCL .cert{\n  padding:4px 11px;border-radius:100px;\n  background:var(--lt);border:1px solid var(--bd);\n  font-family:var(--fm);font-size:10px;color:var(--tx2);letter-spacing:.8px;\n}\n.HXCL .cert.hi{\n  background:var(--acA);border-color:var(--acC);\n  color:var(--ac);font-weight:700;\n}\n<\/style>\n\n<div class=\"HXCL\">\n<div class=\"panel\">\n\n  <div class=\"eyebrow\">Get a Quote<\/div>\n\n  <h2 class=\"headline\">\n    Send Your Drawing.<br><em>Get a Quote.<\/em>\n  <\/h2>\n\n  <p class=\"sub\">Every enquiry includes a DFM review \u2014 tolerance feasibility, material confirmation, and process approach confirmed before production starts. MOQ 1 piece.<\/p>\n\n  <!-- Stats row -->\n  <div class=\"stats\">\n    <div class=\"stat\">\n      <div class=\"sv\">24<small>hr<\/small><\/div>\n      <div class=\"sl\">Quote Response<\/div>\n    <\/div>\n    <div class=\"stat\">\n      <div class=\"sv\">MOQ <small>1<\/small><\/div>\n      <div class=\"sl\">Prototypes OK<\/div>\n    <\/div>\n    <div class=\"stat\">\n      <div class=\"sv\">ISO<\/div>\n      <div class=\"sl\">9001:2015<\/div>\n    <\/div>\n  <\/div>\n\n  <!-- Advantage list -->\n  <div class=\"avlist\">\n    <div class=\"avitem\">\n      <div class=\"ico\">&#128208;<\/div>\n      <div>\n        <div class=\"at\">DFM Review on Every Enquiry<\/div>\n        <div class=\"ad\">Tolerance feasibility, fixturing strategy, and material confirmation. Specific, actionable feedback \u2014 not generic pushback.<\/div>\n      <\/div>\n    <\/div>\n    <div class=\"avitem\">\n      <div class=\"ico\">&#127919;<\/div>\n      <div>\n        <div class=\"at\">First Article Inspection \u2014 Standard<\/div>\n        <div class=\"ad\">FAI report on every new run. Material certs and surface treatment certs included with every shipment.<\/div>\n      <\/div>\n    <\/div>\n    <div class=\"avitem\">\n      <div class=\"ico\">&#128260;<\/div>\n      <div>\n        <div class=\"at\">Same Process: Prototype to Production<\/div>\n        <div class=\"ad\">Process plan from your prototype applies to production batches. No re-qualification when you scale.<\/div>\n      <\/div>\n    <\/div>\n    <div class=\"avitem\">\n      <div class=\"ico\">&#9881;<\/div>\n      <div>\n        <div class=\"at\">3 \/ 4 \/ 5-Axis CNC + Turning<\/div>\n        <div class=\"ad\">Complex structural parts, shafts, housings, and transmission components. Metals and engineering plastics.<\/div>\n      <\/div>\n    <\/div>\n  <\/div>\n\n  <!-- Cert tags -->\n  <div class=\"certs\">\n    <span class=\"cert hi\">ISO 9001:2015<\/span>\n    <span class=\"cert\">3\/4\/5-Axis Milling<\/span>\n    <span class=\"cert\">CNC Turning<\/span>\n    <span class=\"cert\">CMM Inspection<\/span>\n    <span class=\"cert\">Global Delivery<\/span>\n  <\/div>\n\n<\/div>\n<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-76662b59 e-con-full e-flex e-con e-child\" data-id=\"76662b59\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5c58e3f4 elementor-button-align-stretch elementor-widget elementor-widget-form\" data-id=\"5c58e3f4\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;step_next_label&quot;:&quot;Next&quot;,&quot;step_previous_label&quot;:&quot;Previous&quot;,&quot;button_width&quot;:&quot;100&quot;,&quot;step_type&quot;:&quot;number_text&quot;,&quot;step_icon_shape&quot;:&quot;circle&quot;}\" data-widget_type=\"form.default\">\n\t\t\t\t\t\t\t<form class=\"elementor-form\" method=\"post\" name=\"New Form\" aria-label=\"New Form\">\n\t\t\t<input type=\"hidden\" name=\"post_id\" value=\"209\"\/>\n\t\t\t<input type=\"hidden\" name=\"form_id\" value=\"5c58e3f4\"\/>\n\t\t\t<input type=\"hidden\" name=\"referer_title\" value=\"Free-Machining Steel CNC Machining | 1215, 12L14 | HXCNC\" \/>\n\n\t\t\t\t\t\t\t<input type=\"hidden\" name=\"queried_id\" value=\"209\"\/>\n\t\t\t\n\t\t\t<div class=\"elementor-form-fields-wrapper elementor-labels-above\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-text elementor-field-group elementor-column elementor-field-group-name elementor-col-100\">\n\t\t\t\t\t\t\t\t\t\t\t\t<label for=\"form-field-name\" class=\"elementor-field-label\">\n\t\t\t\t\t\t\t\tName\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<input size=\"1\" type=\"text\" name=\"form_fields[name]\" id=\"form-field-name\" class=\"elementor-field elementor-size-sm  elementor-field-textual\" placeholder=\"Name\">\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-text elementor-field-group elementor-column elementor-field-group-field_12786b6 elementor-col-100\">\n\t\t\t\t\t\t\t\t\t\t\t\t<label for=\"form-field-field_12786b6\" class=\"elementor-field-label\">\n\t\t\t\t\t\t\t\tCompany\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<input size=\"1\" type=\"text\" name=\"form_fields[field_12786b6]\" id=\"form-field-field_12786b6\" class=\"elementor-field elementor-size-sm  elementor-field-textual\" placeholder=\"Company Name\">\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-email elementor-field-group elementor-column elementor-field-group-email elementor-col-100 elementor-field-required\">\n\t\t\t\t\t\t\t\t\t\t\t\t<label for=\"form-field-email\" class=\"elementor-field-label\">\n\t\t\t\t\t\t\t\tEmail\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<input size=\"1\" type=\"email\" name=\"form_fields[email]\" id=\"form-field-email\" class=\"elementor-field elementor-size-sm  elementor-field-textual\" placeholder=\"Email\" required=\"required\">\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-select elementor-field-group elementor-column elementor-field-group-field_0c79fc0 elementor-col-100\">\n\t\t\t\t\t\t\t\t\t\t\t\t<label for=\"form-field-field_0c79fc0\" class=\"elementor-field-label\">\n\t\t\t\t\t\t\t\tMaterial\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field elementor-select-wrapper remove-before \">\n\t\t\t<div class=\"select-caret-down-wrapper\">\n\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-eicon-caret-down\" viewBox=\"0 0 571.4 571.4\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M571 393Q571 407 561 418L311 668Q300 679 286 679T261 668L11 418Q0 407 0 393T11 368 36 357H536Q550 357 561 368T571 393Z\"><\/path><\/svg>\t\t\t<\/div>\n\t\t\t<select name=\"form_fields[field_0c79fc0]\" id=\"form-field-field_0c79fc0\" class=\"elementor-field-textual elementor-size-sm\">\n\t\t\t\t\t\t\t\t\t<option value=\"aluminium_6061_t6\">Aluminium 6061-T6<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"aluminium_7075_t6\">Aluminium 7075-T6<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"stainless_steel_304\">Stainless Steel 304<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"stainless_steel_316l\">Stainless Steel 316L<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"carbon_steel_4140\">Carbon Steel \/ 4140<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"titanium_ti_6al_4v\">Titanium Ti-6Al-4V<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"brass_c360\">Brass C360<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"copper\">Copper<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"peek\">PEEK<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"pom_acetal\">POM \/ Acetal<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"nylon_pa6_pa66\">Nylon PA6 \/ PA66<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"ptfe_teflon\">PTFE \/ Teflon<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"polycarbonate\">Polycarbonate<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"abs\">ABS<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"other_not_sure\">Other \/ Not sure<\/option>\n\t\t\t\t\t\t\t<\/select>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-select elementor-field-group elementor-column elementor-field-group-field_161b5ef elementor-col-100\">\n\t\t\t\t\t\t\t\t\t\t\t\t<label for=\"form-field-field_161b5ef\" class=\"elementor-field-label\">\n\t\t\t\t\t\t\t\tSurface Finish\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field elementor-select-wrapper remove-before \">\n\t\t\t<div class=\"select-caret-down-wrapper\">\n\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-eicon-caret-down\" viewBox=\"0 0 571.4 571.4\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M571 393Q571 407 561 418L311 668Q300 679 286 679T261 668L11 418Q0 407 0 393T11 368 36 357H536Q550 357 561 368T571 393Z\"><\/path><\/svg>\t\t\t<\/div>\n\t\t\t<select name=\"form_fields[field_161b5ef]\" id=\"form-field-field_161b5ef\" class=\"elementor-field-textual elementor-size-sm\">\n\t\t\t\t\t\t\t\t\t<option value=\"as_machined\">As-machined<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"anodised_type_ii\">Anodised Type II<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"anodised_type_iii_hard\">Anodised Type III (Hard)<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"electroplating\">Electroplating<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"powder_coating\">Powder Coating<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"black_oxide\">Black Oxide<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"passivation_ss\">Passivation (SS)<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"polishing_ra_requirement\">Polishing \/ Ra requirement<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"other_specify_below\">Other (specify below)<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"Select \">Select finish (optional)<\/option>\n\t\t\t\t\t\t\t<\/select>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-textarea elementor-field-group elementor-column elementor-field-group-message elementor-col-100\">\n\t\t\t\t\t\t\t\t\t\t\t\t<label for=\"form-field-message\" class=\"elementor-field-label\">\n\t\t\t\t\t\t\t\tAdditional Requirements\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t<textarea class=\"elementor-field-textual elementor-field  elementor-size-sm\" name=\"form_fields[message]\" id=\"form-field-message\" rows=\"4\" placeholder=\"Target delivery date, critical dimensions, tolerance callouts, inspection requirements, application 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High-Volume Bar-Fed Turning Fittings \u00b7 Fasteners \u00b7 Connectors Precision CNC turning of 1215, 12L14, and SUM24L free-machining steels for high-volume production of fittings, fasteners, connectors, shafts, and precision turned [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-209","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.3 (Yoast SEO v28.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Free-Machining Steel CNC Machining | 1215, 12L14 | HXCNC<\/title>\n<meta name=\"description\" content=\"CNC machining of free-machining steel grades 1215 and 12L14 for high-volume, tight-tolerance parts. 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