Haynes 25/L605 is a Cobalt-Nickel-Chromium-Tungsten alloy that combines good high temperature strength with good resistance to oxidising environments up to 980oC (1795oF) for long exposures. It also has excellent resistance to sulphidation.
Haynes 25/L605 is also known as Udimet L605.
| Element | Min % | Max % |
| C | 0.05 | 0.15 |
| Mn | 1.00 | 2.00 |
| Si | – | 0.40 |
| P | – | 0.04 |
| S | – | 0.03 |
| Cr | 19.00 | 21.00 |
| Ni | 9.00 | 11.00 |
| W | 14.00 | 16.00 |
| Fe | – | 3.00 |
| Co | bal | |
Density
9.13 g/cm³ | 0.330 lb/in³
Melting Point
1410°C | 2570°F
Coefficient of Expansion
12.3 μm/m °C (20 – 100°C) | 6.8 x 10-6 in/in °F (70 – 212°F)
Modulus of Rigidity
98 kN/mm² | 14214 ksi
Modulus of Elasticity
225 kN/mm² | 32634 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 | 900 – 1500 | 131 – 218 | -200 to +900 | -330 to +1650 |
| Spring Temper | 1400 – 1800 | 203 – 261 | -200 to +900 | -330 to +1650 |