A Nickel-Chromium-Molybdenum alloy with better overall resistance and versatility than any other NiCrMo available. It has excellent resistance to localised corrosion and to a variety of mixed industrial chemicals.
Hastelloy C-22 is also known as Nicrofer 5621, Superimphy C22, and Inconel 622.
| Element | Min % | Max % |
| Cr | 20.00 | 22.50 |
| Mo | 12.50 | 14.50 |
| Fe | 2.00 | 6.00 |
| W | 2.50 | 3.50 |
| C | – | 0.015 |
| Si | – | 0.08 |
| Co | – | 2.50 |
| Mn | – | 0.50 |
| V | – | 0.35 |
| P | – | 0.02 |
| S | – | 0.02 |
| Ni | Bal | |
Density
8.69 g/cm³ | 0.314 lb/in³
Melting Point
1399°C | 2550°F
Coefficient of Expansion
12.4 μm/m °C (20 – 100°C) | 6.9 x 10-6 in/in °F (70 – 212°F)
Modulus of Rigidity
78.6 kN/mm² | 11400 ksi
Modulus of Elasticity
205.5 kN/mm² | 29806 ksi
Heat Treatment of Finished Parts
| Condition as supplied by Alloy Wire | Type | Temperature | Time (Hr) | Cooling | |
| °C | °F | ||||
| Annealed or Spring Temper | Stress Relieve | 400 – 450 | 750 – 840 | 2 | Air |
Properties
| Condition | Approx. tensile strength | Approx. operating temperature | ||
| N/mm² | ksi | °C | °F | |
| Annealed | 800 – 1100 | 116 – 159 | -200 to +400 | -330 to +750 |
| Spring Temper | 1400 – 1700 | 203 – 247 | -200 to +400 | -330 to +750 |