| 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 |
| ATI Allvac | Carpenter Technology Corporation (Cartech) | Crucible Steel |
| EDRO | MetalTek | Osprey Metals, Ltd. |
| The NanoSteel® Company | ThyssenKrupp | Trimay® Wear Plate Ltd |
| Universal Wire Works | Wingate Alloys |