| AISI 4000 Series Steel | Low Alloy Steel | Medium Alloy Steel |
| AISI 8000 Series Steel | AISI 5000 Series Steel | AISI 6000 Series Steel |
| AISI 9000 Series Steel |
| AK Steel | Assab Steels | Bisalloy Steels |
| Carpenter Technology Corporation (Cartech) | Crucible Steel | EDRO |
| FloMet LLC | Osprey Metals, Ltd. | PSM Industries |
| SSAB Tunnplat AB | Universal Wire Works | Wingate Alloys |