| Hot Work Steel | Shock-Resisting Steel | Cold Work Steel |
| Mold Steel | Oil-Hardening Steel | Air-Hardening Steel |
| Assab Steels | ATI Allegheny Ludlum | Crucible Compaction Metals |
| Crucible Steel | EDRO | Latrobe Steel |
| MetalTek | Misumi | Osprey Metals, Ltd. |
| PSM Industries | Schmolz + Bickenbach (Swiss Steel International) | Wingate Alloys |