MP35N is an age hardenable Nickel-Cobalt base alloy that has a unique combination of properties – ultra high strength, toughness, ductility and outstanding corrosion resistance. MP35N resists corrosion in hydrogen sulphide, salt water and other chloride solutions. It also has excellent resistance to crevice and stress corrosion cracking in sea water and other hostile environments. Suitable where a high combination of strength, high modulus values and good corrosion resistance are required. Applications for this alloy also include medical devices and dental products.
MP35N is also known as Allvac 35N.
| Element | Min % | Max % |
| C | – | 0.025 |
| P | – | 0.015 |
| Si | – | 0.15 |
| Ni | 33.00 | 37.00 |
| Co | bal | |
| Mn | – | 0.15 |
| S | – | 0.01 |
| Cr | 19.00 | 21.00 |
| Mo | 9.00 | 10.50 |
| Ti | – | 1.00 |
| Fe | – | 1.00 |
Density
8.43 g/cm³ | 0.304 lb/in³
Melting Point
1440°C | 1440°C
Coefficient of Expansion
12.8 μm/m °C (20 – 100°C) | 12.8 μm/m °C (20 – 100°C)
Modulus of Rigidity
80.7 kN/mm² | 11705 ksi
Modulus of Elasticity
234 kN/mm² | 33939 ksi
Heat Treatment of Finished Parts
| Condition as supplied by Alloy Wire | Type | Temperature | Time (Hr) | Cooling | |
| °C | °F | ||||
| Annealed | – | – | – | – | – |
| Spring Temper | Age Harden | 650 | 1200 | 4 | Air |
Properties
| Condition | Approx. tensile strength | Approx. operating temperature | ||
| N/mm² | ksi | °C | °F | |
| Annealed | < 1100 | < 160 | -200 to +315 | -330 to +600 |
| Spring Temper | 1400 – 1900 | 203 – 276 | -200 to +315 | -330 to +600 |
| Spring Temper + Aged | 1900 – 2200 | 276 – 319 | -200 to +315 | -330 to +600 |