| Medium Carbon Steel | AISI 1000 Series Steel | Low Carbon Steel |
| High Carbon Steel |
| AK Steel | Assab Steels | ATI Allegheny Ludlum |
| Carpenter Technology Corporation (Cartech) | Crucible Steel | EDRO |
| Groupe Arcelor | Osprey Metals, Ltd. | SSAB Tunnplat AB |
| ThyssenKrupp | Universal Wire Works |