Rene 41 is an age hardenable nickel base alloy that has very high strength at elevated temperatures, particularly within the range of 650 – 980oC (1200 – 1800oF). Required mechanical properties can be tailored by selection of various combinations of cold work and/or heat treatments. Rene 41 also has good oxidation resistance.
Rene 41 is also known as Haynes R-41, Pyromet 41, and Udimet R41.
| Element | Min % | Max % |
| C | – | 0.12 |
| Mn | – | 0.10 |
| Si | – | 0.50 |
| S | – | 0.015 |
| Cr | 18.00 | 20.00 |
| Co | 10.00 | 12.00 |
| Mo | 9.00 | 10.50 |
| Ti | 3.00 | 3.30 |
| Al | 1.40 | 1.60 |
| B | 0.003 | 0.01 |
| Fe | – | 5.00 |
| Ni | bal | |
Density
8.25 g/cm³ | 0.298 lb/in³
Melting Point
1345°C | 2450°F
Coefficient of Expansion
13.6 μm/m °C (20 – 100°C) | 7.41 x 10-6 in/in °F (70 – 212°F)
Modulus of Rigidity
83.2 kN/mm² | 12067 ksi
Modulus of Elasticity
218.0 kN/mm² | 31619 ksi
Heat Treatment of Finished Parts
| Condition as supplied by Alloy Wire | Type | Temperature | Time (Hr) | Cooling | |
| °C | °F | ||||
| Annealed | Age Harden | 760 | 1400 | 16 | Air |
| Spring Temper | Solution Anneal Age Harden | 1065 760 | 1950 1400 | 4 16 | Air Air |
| Spring Temper | Age Harden | 760 | 1400 | 16 | Air |
Properties
| Condition | Approx. tensile strength | Approx. operating temperature | ||
| N/mm² | ksi | °C | °F | |
| Annealed | 800 – 1100 | 116 – 159 | ||
| Annealed + Aged | 1350 – 1550 | 196 – 225 | up to +550 | up to +1020 |
| Spring Temper | 1400 – 1800 | 203 – 261 | ||
| Spring Temper + Annealed + Aged | 1350 – 1550 | 196 – 225 | up to +550 | up to +1020 |
| Spring Temper + Aged | 1600 – 2000 | 232 – 290 | up to +550 | up to +1020 |