| HT-15 | Heat Treatment of Alloy Steels , Over 260,000 psi | Heat Treat |
| Supersedes: None | Superseded By: None | |
| Selected sector: AS | Date added: | |
| SupplierNumber | SupplierName | State | CountryName |
| 90049444 | CERTIFIED STEEL TREATING CORP | CA | United States |
| 90050735 | HERCULES HEAT TREATING CORPORA | NY | United States |