| Material Codes | |
| 1 | High-Speed Steels |
| 2 | Tool Steels |
| 3 |
Oil-Hardening |
| 4 | Hardenable Stainless Steels |
| 5 | Non-Hardenable Stainless Steels |
| 6 | Precipitation-Hardening Stainless Steels |
| 7 | Super-Alloys |
| 8 | Refractory Metals |
| 9 | Carburising Steels |
| 10 | Alloy Cast Iron |
| 11 | Ferrous
Investment Castings |
| 12 | Powdered Metals |
| 13 | Cast Iron |
| 14 | Brass |
| 15 | Bronze & Bronze Alloys |
| 16 | Beryllium Copper |
| 17 | Copper & copper Alloys |
| 18 | Nickel |
| 19 | Silver |
| 20 | Gold |
| 21 | Nitralloy |
| 22 | Aluminum Alloys |
| 23 | Glass |