| Stainless Steel | Alloy Steel | Carbon Steel |
| Tool Steel | Duplex | Pressure Vessel Steel |
| Cast Iron | Maraging Steel | Chrome-moly Steel |
| Special-Purpose Steel |
| Alliance LLC | ATI Allvac | Electro Optical Systems (EOS) |
| Goodfellow | H.C. Starck | High Performance Alloys, Inc |
| Meehanite | Outokumpu | P & P Technology |
| United Cast Bar | Universal Wire Works | Weartech |