| 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 |
| ArcelorMittal | Assab Steels | Bisalloy Steels |
| Bohler-Uddeholm | Groupe Arcelor | Kinetics, Inc. |
| Latrobe Steel | MetalTek | PSM Industries |
| QuesTek® Innovations | SSAB Tunnplat AB | Universal Wire Works |