11SMnPb30
1.0718Leaded free-cutting steel — the highest machinability rating among carbon steels. Pb+S combination gives excellent chip breaking and surface finish. The standard grade for high-volume automatic lathe parts. Used for screws, nuts, bolts, bushings, pins, and automotive turned parts. ≈ AISI 12L14.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | AISI | USA | AISI 12L14 | G12144 | REF |
| 🇪🇺 | EN | Europe | 11SMnPb30 | 1.0718 | 100% |
| 🇯🇵 | JIS | Japan | SUM24L | — | 90% |
Sources: ASTM A29, EN 10087, JIS G4804
Mechanical properties — Pro
Cold worked
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | ||
| Yield Strength | ||
| Elongation | ||
| Elastic Modulus | ||
| Density |
General
| Property | Value | Unit |
|---|---|---|
| Hardness HB |
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