| Medium Carbon Steel | AISI 1000 Series Steel | Low Carbon Steel |
| High Carbon Steel |
| AK Steel | Assab Steels | Bisalloy Steels |
| Carpenter Technology Corporation (Cartech) | EDRO | Groupe Arcelor |
| Hardwire, LLC | Pacific Sintered Materials | ThyssenKrupp |
| Universal Wire Works | Wingate Alloys |