9SMn28
1.0715Free-cutting steel with high sulfur for excellent machinability. Very similar to 11SMn30 — historical German designation that is still widely referenced. Lower C variant preferred for some screw machine products. Used for high-volume automatic lathe parts, screws, nuts, pins, and bushings. ≈ AISI 1215.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | AISI | USA | AISI 1215 (approx) | — | REF |
| 🇪🇺 | EN | Europe | 9SMn28 | 1.0715 | 100% |
Sources: ASTM A29, EN 10087
Chemical composition comparison (wt%)
Side-by-side: 9SMn28 (EN 10087) vs 9SMn28 (EN) (EN 10087)
| Element | 9SMn28 (EN 10087) | 9SMn28 (EN) | Overlap |
|---|---|---|---|
| C | — | 0–0.13% | — |
| Si | — | 0–0.05% | — |
Mechanical properties
Compatibility verdict
9SMn28 and 9SMn28: 100% composition match
Related materials
C45
1.0503Medium carbon unalloyed quality steel. Good machinability and moderate strength after heat treatment. Widely used for shafts, spindles, pins, studs, and general machine parts.
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).
S235JR
1.0038General-purpose structural steel with minimum yield strength of 235 MPa. The most common structural steel grade in Europe for general construction, frames, and non-critical structural applications.
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