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
Chemical composition comparison (wt%)
Side-by-side: 11SMnPb30 (EN) (EN 10087) vs SUM24L (JIS)
| Element | 11SMnPb30 (EN) | SUM24L (JIS) | Overlap |
|---|---|---|---|
| C | 0–0.14% | — | — |
| Si | 0–0.05% | — | — |
| Mn | 0.9–1.3% | — | — |
| P | 0–0.11% | — | — |
| S | 0.27–0.33% | — | — |
| Pb | 0.2–0.35% | — | — |
Mechanical properties
Cold worked
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 460–710 | MPa |
| Yield Strength | ≥ 375 | MPa |
| Elongation | ≥ 8 | % |
| Elastic Modulus | ≥ 210 | GPa |
| Density | ≥ 7.85 | g/cm3 |
General
| Property | Value | Unit |
|---|---|---|
| Hardness HB | ≤ 169 | HB |
Compatibility verdict
11SMnPb30 and SUM24L: 90% composition match
Close equivalents but NOT identical.
Related materials
S355JR
1.0045High-strength low-alloy structural steel with minimum yield strength of 355 MPa. Standard grade for bridges, buildings, cranes, and general structural applications. Impact tested at +20°C (JR).
S690QL
1.8928High-strength quenched and tempered fine-grain structural steel with minimum yield strength of 690 MPa. Used for heavily loaded structures like mobile cranes, mining equipment, bridges, and pressure vessels.
S275JR
1.0044Medium-strength structural steel with minimum yield strength of 275 MPa. Bridges the gap between S235JR and S355JR. Used for general structural applications, lattice towers, masts, and light crane components. Impact tested at +20°C (JR).
Not sure which material fits?
🤖 Ask AI Advisor →All data is for reference only. Equivalents indicate similarity, not identity. Always verify against the applicable specification for safety-critical applications. materialref.com accepts no liability for decisions based on this data.