| Hot Work Steel | Shock-Resisting Steel | Cold Work Steel |
| Mold Steel | Oil-Hardening Steel | Air-Hardening Steel |
| 3D Systems Corporation | Assab Steels | Bohler-Uddeholm |
| Crucible Compaction Metals | Crucible Steel | EDRO |
| Groupe Arcelor | International Mold Steel | Latrobe Steel |
| MetalTek | Misumi | Osprey Metals, Ltd. |