| Stainless Steel | Alloy Steel | Carbon Steel |
| Tool Steel | Duplex | Pressure Vessel Steel |
| Cast Iron | Maraging Steel | Chrome-moly Steel |
| Special-Purpose Steel |
| AK Steel | Carlson | Dura-Bar |
| Goodfellow | Kennametal Stellite | Meehanite |
| Outokumpu | P & P Technology | Pacific Sintered Materials |
| Plansee SE | Pyramid Stainless Steel Ind Co Ltd | Universal Wire Works |