| Stainless Steel | Alloy Steel | Carbon Steel |
| Tool Steel | Duplex | Pressure Vessel Steel |
| Cast Iron | Maraging Steel | Chrome-moly Steel |
| Special-Purpose Steel |
| 3D Systems Corporation | Alliance LLC | ATI Allegheny Ludlum |
| Crucible Compaction Metals | H.C. Starck | Kennametal Stellite |
| Kinetics, Inc. | Less Common Metals | Outokumpu |
| ThyssenKrupp | United Cast Bar |