| AISI 4000 Series Steel | Low Alloy Steel | Medium Alloy Steel |
| AISI 8000 Series Steel | AISI 5000 Series Steel | AISI 6000 Series Steel |
| AISI 9000 Series Steel |
| AK Steel | Bisalloy Steels | Crucible Steel |
| EDRO | Kinetics, Inc. | Latrobe Steel |
| Niagara LaSalle | Osprey Metals, Ltd. | PSM Industries |
| QuesTek® Innovations | Trimay® Wear Plate Ltd | Wingate Alloys |