| Stainless Steel | Alloy Steel | Carbon Steel |
| Tool Steel | Duplex | Pressure Vessel Steel |
| Cast Iron | Maraging Steel | Chrome-moly Steel |
| Special-Purpose Steel |
| 3M | Alliance LLC | American Elements |
| American Utility Metals | FloMet LLC | Garlock Rubber Technologies |
| Kinetics, Inc. | Latrobe Steel | Less Common Metals |
| Osprey Metals, Ltd. | SSAB Tunnplat AB | ThyssenKrupp |