| Availability: | |
|---|---|
| Quantity: | |
| Element | Min % | Max % |
| Cr | 20.50 | 23.00 |
| Mo | 8.00 | 10.00 |
| Fe | 17.00 | 20.00 |
| W | 0.20 | 1.00 |
| C | 0.05 | 0.15 |
| Si | – | 1.00 |
| Co | 0.50 | 2.50 |
| Mn | – | 1.00 |
| P | – | 0.04 |
| S | – | 0.03 |
| B | – | 0.01 |
| Ni | bal |
Designations: AWS 057
Specifications: AMS 5754 , AMS 5798 , ASTM B619
Heat treatment of finished parts
| Condition as supplied by AWI | Type | Temperature | Time | Cooling |
| Annealed or Spring Temper | Stress Relieve | 400 – 450 °C (750 – 840 °F) | 2 Hr | Air |
Properties
| Annealed | ||
| Approx. tensile strength | <1050 N/mm² | <152 ksi |
| Approx. operating temperature depending on loading and environment | -200 to +400 °C | -330 to +750 °F |
| Spring Temper | ||
| Approx. tensile strength | 1350 – 1550 N/mm² | 196 – 225 ksi |
| Approx. operating temperature depending on loading and environment | -200 to +400 °C | -330 to +750 °F |