ISO steel grades — 531 designations — Page 4
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 |
|---|---|---|---|---|
| 56NiCrMoV7 | 1.2713 | Tool steels for cold work | 0.5–0.6 | 12 |
| 56NiCrMoV7 | 1.2714 | Tool steels for hot work | 0.5–0.6 | 15 |
| 59Si7 | 1.5027 | Spring steels | 0.56–0.64 | 11 |
| 59Si7 | 1.5028 | Spring steels | 0.6–0.7 | 11 |
| 59Si7 | 1.7108 | Spring steels | 0.57–0.65 | 11 |
| 600-3 | EN-JS1060 | Others | — | 20 |
| 600-3 | EN-JS1092 | Others | — | 20 |
| 600-3 | EN-JS1093 | Others | — | 20 |
| 60CrB3 | 1.7138 | Spring steels | 0.48–0.55 | 4 |
| 60CrB3 | 1.7190 | Spring steels | 0.58 | 7 |
| 60CrMo3-3 | — | — | 0.56–0.64 | 3 |
| 60CrMo32 | 1.7241 | Others | 0.56–0.64 | 4 |
| 60MnSiCr4 | 1.2101 | Tool steels for cold work | 0.58–0.66 | 5 |
| 60MnSiCr4 | 1.2826 | Tool steels for cold work | 0.58–0.65 | 9 |
| 60WCrV8 | 1.2542 | Tool steels for cold work | 0.4–0.5 | 12 |
| 60WCrV8 | 1.2550 | Tool steels for cold work | 0.55–0.65 | 15 |
| 700-2 | EN-JS1102 | Others | — | 21 |
| 700-2 | EN-JS1103 | Others | — | 21 |
| 800-2 | EN-JS1080 | Others | — | 16 |
| 90MnCrV8 | 1.2842 | Tool steels for cold work | 0.85–0.95 | 14 |
| 90MnV2 | 1.2842 | Tool steels for cold work | 0.85–0.95 | 14 |
| 95MnWCr5 | 1.2510 | Tool steels for cold work | 0.9–1.05 | 13 |
| 95MnWCr5 | 1.2825 | Tool steels for cold work | 0.9–1 | 13 |
| 9NiMnMoNb5-4-4 | 1.6368 | Heat-resistant structural steels | ≤ 0.17 | 4 |
| 9S20 | — | — | ≤ 0.09 | 3 |
| A-1b | 1.4125 | Stainless steels | 0.95–1.2 | 11 |
| BNI6025 | 2.4633 | Nickel and cobalt alloys | 0.15–0.25 | 3 |
| C-Ni99 | 2.4066 | Nickel and cobalt alloys | ≤ 0.1 | 10 |
| C-Ni99 | 2.4068 | Nickel and cobalt alloys | ≤ 0.02 | 8 |
| C-Ni99-HC | 2.4066 | Nickel and cobalt alloys | ≤ 0.1 | 10 |
| C-Ni99-HC | 2.4068 | Nickel and cobalt alloys | ≤ 0.02 | 8 |
| C-NiMo31 | 2.4617 | Nickel and cobalt alloys | ≤ 0.01 | 4 |
| C10 | 1.1121 | Case hardening steels | 0.07–0.13 | 22 |
| C10 | 1.1207 | Case hardening steels | 0.07–0.13 | 5 |
| C105U | 1.1645 | Unalloyed tool steels / carbon steels | 1–1.1 | 18 |
| C105U | 1.1545 | Unalloyed tool steels / carbon steels | 1–1.1 | 19 |
| C10GC | 1.0334 | Unalloyed structural steels | ≤ 0.1 | 11 |
| C120U | 1.1555 | Unalloyed tool steels / carbon steels | 1.15–1.25 | 16 |
| C120U | — | — | 1.15–1.24 | 7 |
| C15E4 | 1.1141 | Case hardening steels | 0.12–0.18 | 20 |
| C15GC | 1.0234 | Unalloyed structural steels | 0.13–0.17 | 7 |
| C15M2 | 1.1140 | Case hardening steels | 0.12–0.18 | 7 |
| C15M2 | 1.1121 | Case hardening steels | 0.07–0.13 | 22 |
| C15M2 | 1.1141 | Case hardening steels | 0.12–0.18 | 20 |
| C16E4 | 1.1148 | Case hardening steels | 0.12–0.18 | 7 |
| C17C | — | — | 0.15–0.2 | 4 |
| C20E2C | — | — | 0.18–0.23 | 4 |
| C20E2C | — | — | 0.18–0.23 | 5 |
| C20GC | — | — | 0.18–0.23 | 5 |
| C25 | 1.0402 | Quenched and tempered steels | 0.17–0.24 | 24 |
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.