ISO steel grades — 531 designations — Page 3
Every grade designated under ISO, with the material number it maps to, what kind of steel it is, its carbon window and how many other standards carry it. Open a grade for its full composition, properties and its designations in other standards. Every name on this page is an indicative cross-reference, not an asserted identity: the grades are close, not interchangeable. Check the composition before you substitute.
Also known as
531 designations| Grade | Material no. | Category | C% by weight | Also inother standards |
|---|---|---|---|---|
| 35S20 | 1.0726 | Free cutting steels | 0.32–0.39 | 15 |
| 35SMn20 | 1.0762 | Free cutting steels | 0.4–0.48 | 20 |
| 36CrNiMo4 | 1.6511 | Quenched and tempered steels | 0.32–0.4 | 18 |
| 36CrNiMo6 | 1.6582 | Quenched and tempered steels | 0.3–0.38 | 25 |
| 36Mn6 | 1.1167 | Quenched and tempered steels | 0.32–0.4 | 17 |
| 36Mn6H | 1.1167 | Quenched and tempered steels | 0.32–0.4 | 17 |
| 37Cr4 | 1.7035 | Quenched and tempered steels | 0.38–0.45 | 18 |
| 37Cr4 | 1.7034 | Quenched and tempered steels | 0.34–0.41 | 23 |
| 37CrS4 | 1.7034 | Quenched and tempered steels | 0.34–0.41 | 23 |
| 37CrS4 | 1.7035 | Quenched and tempered steels | 0.38–0.45 | 18 |
| 37CrS4 | 1.7038 | Quenched and tempered steels | 0.34–0.41 | 7 |
| 38Si7 | 1.0901 | Others | 0.35–0.42 | 2 |
| 400-12 | EN-JS1030 | Others | — | 17 |
| 400-12 | EN-JS1072 | Others | — | 17 |
| 400-12 | EN-JS1073 | Others | — | 17 |
| 400-15 | EN-JS1030 | Others | — | 17 |
| 400-15 | EN-JS1072 | Others | — | 17 |
| 400-15 | EN-JS1073 | Others | — | 17 |
| 40CrMoV5 | 1.2344 | Tool steels for hot work | 0.35–0.42 | 20 |
| 41Cr4 | 1.7035 | Quenched and tempered steels | 0.38–0.45 | 18 |
| 41CrNiMo2 | — | — | — | 2 |
| 41CrNiMoS2 | — | — | — | 2 |
| 41CrS4 | 1.7035 | Quenched and tempered steels | 0.38–0.45 | 18 |
| 41CrS4 | 1.7039 | Quenched and tempered steels | 0.38–0.45 | 13 |
| 42CrMo4 | 1.7225 | Quenched and tempered steels | 0.38–0.45 | 25 |
| 42CrMo4 | — | — | 0.38–0.43 | 4 |
| 42CrMo4E | — | — | 0.38–0.45 | 4 |
| 42CrMoS4 | 1.7225 | Quenched and tempered steels | 0.38–0.45 | 25 |
| 42CrMoS4 | 1.7227 | Quenched and tempered steels | 0.38–0.45 | 15 |
| 42Mn6 | 1.1127 | Quenched and tempered steels | 0.34–0.42 | 6 |
| 42Mn6 | 1.1167 | Quenched and tempered steels | 0.32–0.4 | 17 |
| 44SMn28 | 1.0762 | Free cutting steels | 0.4–0.48 | 20 |
| 4509-439-40-x | 1.4509 | Stainless steels | ≤ 0.03 | 4 |
| 45NiCrMo16 | 1.2766 | Tool steels for hot work | 0.32–0.38 | 5 |
| 45NiCrMo16 | 1.2767 | Tool steels for cold work | 0.4–0.5 | 9 |
| 45WCrV7 | 1.2550 | Tool steels for cold work | 0.55–0.65 | 15 |
| 45WCrV7 | 1.2542 | Tool steels for cold work | 0.4–0.5 | 12 |
| 46Cr2 | 1.7034 | Quenched and tempered steels | 0.34–0.41 | 23 |
| 46S20 | 1.0727 | Free cutting steels | 0.42–0.5 | 8 |
| 500-7 | EN-JS1082 | Others | — | 20 |
| 500-7 | EN-JS1083 | Others | — | 20 |
| 50CrMo4 | 1.7228 | Quenched and tempered steels | 0.46–0.54 | 12 |
| 51CrV4 | 1.8159 | Quenched and tempered steels | 0.47–0.55 | 27 |
| 52CrMoV4 | — | — | 0.48–0.56 | 2 |
| 55NiCrMoV7 | 1.2713 | Tool steels for cold work | 0.5–0.6 | 12 |
| 55NiCrMoV7 | 1.2714 | Tool steels for hot work | 0.5–0.6 | 15 |
| 55SiCr63 | 1.7102 | Spring steels | 0.51–0.59 | 14 |
| 56Mn4 | 1.1260 | Others | 0.6–0.71 | 7 |
| 56Mn4 | 1.1240 | Others | 0.6–0.7 | 10 |
| 56Mn4 | 1.1233 | Quenched and tempered steels | 0.52–0.6 | 7 |
This grade’s own name — recorded in our sources as this grade’s own designation under that standard.
Indicative — taken from a published cross-reference table; a close match, not a guarantee of interchangeability. Verify against the mill certificate before ordering.
Withdrawn — designation no longer current — a separate column from the two above, so a name can be same grade and withdrawn at once.