A Nickel-Chromium-Molybdenum alloy with excellent corrosion resistance in a wide range of corrosive media, being especially resistant to pitting and crevice corrosion. It is a favourable choice for sea water applications.
Inconel® 625 is also known as Nicrofer 6020, Superimphy 625, Chronin 625, Haynes 625, Pyromet 625, Supermet 625 and Udimet 625.
| Element | Min % | Max % |
| C | – | 0.10 |
| Mn | – | 0.50 |
| Si | – | 0.50 |
| P | – | 0.015 |
| S | – | 0.015 |
| Cr | 20.00 | 23.00 |
| Co | – | 1.00 |
| Mo | 8.00 | 10.00 |
| Fe | – | 5.00 |
| Al | – | 0.40 |
| Ti | – | 0.40 |
| Ni | 58.00 | – |
| Nb/Cb | 3.15 | 4.15 |
| Ta | – | 0.05 |
| Cu | – | 0.5 |
Density
8.44g/cm³ | 0.305 lb/in³
Melting Point
1350°C | 2460°F
Coefficient of Expansion
12.8 μm/m °C (20 – 100°C) | 7.1 x 10-6 in/in °F (70 – 212°F)
Modulus of Rigidity
79 kN/mm² | 11458 ksi
Modulus of Elasticity
205.8 kN/mm² | 29849 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 | 260 – 370 | 500 – 700 | 0.5 – 1 | Air |
Properties
| Condition | Approx. tensile strength | Approx. operating temperature | ||
| N/mm² | ksi | °C | °F | |
| Annealed | < 1050 | < 152 | -200 to +340 | -330 to +645 |
| Spring Temper | 1300 – 1600 | 189 – 232 | up to +200 | up to +395 |