11SMn30
1.0715Sulfur-manganese free-cutting steel, not intended for heat treatment. Excellent machinability (significantly better than standard carbon steels). Used for high-volume CNC-machined parts: bolts, nuts, pipe joints, bushings, fittings, and other turned components.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | SAE | USA | SAE 1213 | — | REF |
| 🇪🇺 | EN | Europe | 11SMn30 | 1.0715 | 100% |
| 🇪🇺 | DIN | Europe | 9SMn28 (old) | — | 98% |
| 🇯🇵 | JIS | Japan | SUM22 | — | 88% |
| 🇺🇸 | SAE | USA | SAE 1215 | — | 85% |
| 🇨🇳 | GB | China | Y15 | — | 85% |
Sources: ASTM A29, EN ISO 683-4:2018, DIN 1651, JIS G4804, GB/T 8731
Chemical composition comparison (wt%)
Side-by-side: 11SMn30 (EN) (EN ISO 683-4:2018) vs 9SMn28 (old) (DIN)
| Element | 11SMn30 (EN) | 9SMn28 (old) (DIN) | Overlap |
|---|---|---|---|
| C | 0–0.14% | — | — |
| Si | 0–0.05% | — | — |
| Mn | 0.9–1.3% | — | — |
| P | 0–0.11% | — | — |
| S | 0.27–0.33% | — | — |
Mechanical properties
Cold worked
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 380–570 | MPa |
| Hardness HB | 112–169 | HB |
General
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 360–520 | MPa |
| Elastic Modulus | ≥ 210 | GPa |
| Density | ≥ 7.85 | g/cm3 |
Compatibility verdict
11SMn30 and 9SMn28 (old): 98% 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).
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