| HT-19 | Heat Treatment of Precipitation Hardening Corrosion Resistant Steels | Heat Treat |
| Supercedes: None | Superceded By: None |
| Number | Name | State | Country |
| 90049129 | Bodycote Thermal Processing - Huntington Park | CA | United States |
| 90049176 | Braddock Metallurgical Inc | FL | United States |