| GSS 5103 | Heat Treatment of Martensitic Stainless Steels | Heat Treat |
| Supercedes: None | Superceded By: None |
| Number | Name | State | Country |
| 90051689 | Bodycote Thermal Processing - Mclean Street | KS | United States |
| 90035903 | Burton Industries Inc | NY | United States |
| 90050146 | Engineered Heat Treat Inc | MI | United States |
| 90050735 | Hercules Heat Treating Corporation | NY | United States |
| 90051696 | Metallurgical Processing Inc | CT | United States |
| 90053171 | Superior Plating Co | CT | United States |