Nimonic 75 is a Nickel-Chromium alloy with good corrosion and heat resistance.
Nimonic® 75 is also known as Nicrofer 7520.
| Element | Min % | Max % |
| C | 0.08 | 0.15 |
| Si | – | 0.30 |
| Mn | – | 1.00 |
| S | – | 0.15 |
| Co | – | 5.00 |
| Cr | 19.0 | 21.00 |
| Cu | – | 0.50 |
| Fe | – | 5.00 |
| Pb | – | 0.005 |
| Ti | 0.2 | 0.50 |
| P | – | 0.015 |
| Al | – | 0.40 |
| Ni | bal | |
Density
8.37g/cm³ | 0.302 lb/in³
Melting Point
1380°C | 2520°F
Coefficient of Expansion
11.0 μm/m °C (20 – 100°C) | 6.1 x 10-6 in/in °F (70 – 212°F)
Modulus of Rigidity
75.6 kN/mm² | 10965 ksi
Modulus of Elasticity
206 kN/mm² | 29878 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 | 450 – 470 | 840 – 880 | 0.5 – 1 | Air |
Properties
| Condition | Approx. tensile strength | Approx. operating temperature | ||
| N/mm² | ksi | °C | °F | |
| Annealed | 700 – 800 | 102 – 116 | -200 to +1000 | -330 to +1830 |
| Spring Temper | 1200 – 1500 | 174 – 218 | -200 to +1000 | -330 to +1830 |