| Medium Carbon Steel | AISI 1000 Series Steel | Low Carbon Steel |
| High Carbon Steel |
| Assab Steels | ATI Allvac | Bisalloy Steels |
| Carpenter Technology Corporation (Cartech) | EDRO | Hardwire, LLC |
| Osprey Metals, Ltd. | Pacific Sintered Materials | PSM Industries |
| ThyssenKrupp | Wingate Alloys |