| 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 |
| Assab Steels | ATI Allvac | Bisalloy Steels |
| Crucible Steel | FloMet LLC | Groupe Arcelor |
| Kinetics, Inc. | MetalTek | Pacific Sintered Materials |
| QuesTek® Innovations | The NanoSteel® Company | Universal Wire Works |