Quick reference for international steel grade equivalents
| US (AISI) | Germany (DIN) | Japan (JIS) | China (GB) | Type |
|---|---|---|---|---|
| 1045 | C45 (1.0503) | S45C | 45 | Medium carbon |
| 4140 | 42CrMo4 (1.7225) | SCM440 | 42CrMo | Alloy |
| H13 | X40CrMoV5-1 (1.2344) | SKD61 | 4Cr5MoSiV1 | Tool steel |
| D2 | X155CrVMo12-1 (1.2379) | SKD11 | Cr12MoV | Cold work |
| 316 | X5CrNiMo17-12-2 (1.4401) | SUS316 | 0Cr17Ni12Mo2 | Stainless |