| Silver Alloy | Gold Alloy | Platinum Alloy |
| Palladium Alloy |
| Cadi Company | California Fine Wire | Goodfellow |
| Hogen Industries | Indium Corporation of America | Johnson Matthey |
| Lord Adhesives | Lucas-Milhaupt | Lucas-Milhaupt |
| Mi-Tech Metals | Universal Wire Works | Wieland |