This Nickel-Copper alloy is precipitation hardenable, due to the additions of Aluminium and Titanium. It combines the corrosion resistance of Monel 400 but gives the added advantage of extra strength and hardness (as a result of its age hardening ability).
Monel® K-500 is also known as Nicorros Al.
| Element | Min % | Max % |
| Ni | 63.00 | 70.00 |
| Co | – | 2.00 |
| Cu | 27.00 | 33.00 |
| Fe | – | 2.00 |
| Al | 2.30 | 3.20 |
| C | – | 0.25 |
| Si | – | 1.00 |
| Mn | – | 1.50 |
| Ti | 0.35 | 0.85 |
| S | – | 0.01 |
Density
8.44 g/cm³ | 0.305 lb/in³
Melting Point
1350°C | 2460°F
Coefficient of Expansion
13.7 μm/m °C (20 – 100°C) | 7.6 x 10-6 in/in °F (70 – 212°F)
Modulus of Rigidity
66 kN/mm² | 9573 ksi
Modulus of Elasticity
179 kN/mm² | 25962 ksi
Heat Treatment of Finished Parts
| Condition as supplied by Alloy Wire | Type | Temperature | Time (Hr) | Cooling | |
| °C | °F | ||||
| Annealed | Age Harden Δ | 580 – 590 | 1075 – 1095 | 8 – 10 | Air |
| Spring Temper | Age Harden Δ | 530 – 540 | 985 – 1005 | 4 – 6 | Air |
Properties
| Condition | Approx. tensile strength | Approx. operating temperature | ||
| N/mm² | ksi | °C | °F | |
| Annealed | 650 – 850 | 94 – 123 | -100 to +260 | -150 to +500 |
| Annealed + Aged | 950 – 1050 | 138 – 167 | -100 to +260 | -150 to +500 |
| Spring Temper | 1000 – 1300 | 145 – 189 | -100 to +260 | -150 to +500 |
| Spring Temper + Aged | 1200 – 1500 | 174 – 218 | -100 to +260 | -150 to +500 |