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Bars shall be solution heat treated in accordance with AMS-H-6875 by heating to 1900 °F ± 25 °F, holding at heat for a time commensurate with section thickness, heating equipment, and procedure used, and cooling as required to below 90 °F.
Minimum tensile properties in precipitation heat treated conditions:
As solution treated the tensile strength shall not exceed 175 ksi and hardness shall not exceed 363 HB. Precipitation heat treating procedures:
Common Specifications:
AMS 5659 Type 1 = VAR melting process
AMS 5659 Type 2 = ESR melting process
Our common stock sizes from .500” to 8.00” diameters.
Element |
MIN |
MAX |
|---|---|---|
| Carbon | -- | 0.07 |
| Manganese | -- | 1.00 |
| Silicon | -- | 1.00 |
| Phosphorus | -- | 0.030 |
| Sulfur | -- | 0.015 |
| Chromium | 14.00 | 15.50 |
| Nickel | 3.50 | 5.50 |
| Columbium (Niobium) | 5xC | 0.45 |
| Copper | 2.50 | 4.50 |
| Molybdenum | -- | 0.50 |
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