| 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 | ArcelorMittal | ATI Allvac |
| Bohler-Uddeholm | Crucible Steel | Groupe Arcelor |
| Kinetics, Inc. | Latrobe Steel | Pacific Sintered Materials |
| QuesTek® Innovations | ThyssenKrupp |