Nimonic 105 (W Nr, 2 4634) is a wrought nicke-cobalt-chromium-base alloy strengthened by additions of molybdenum, aluminum and titanium. it has been developed for serviceunto950' and combines the high strength of the age-hardening nickel-base alloys with good creep resistance. Nimonic alloy 105 is produced by high frequency melting in air followed by casting in air, or for more critical applications the alloy is produced by vacuum melting and electroslag refining, The alloy is used for turbine blades, discs forgings, ring sections bolts and fasteners.
Nimonic 105 Chemical Composition
| Element | Content (%) |
| Nickel, Ni | 51 |
| Iron, Fe | 1 |
| Chromium, Cr | 14-15.7 |
| Molybdenum, Mo | 4.50-5.50 |
| Cobalt, Co | 18-22 |
| Titanium, Ti | 0.90-1.50 |
| Aluminum, Al | 4.50-4.90 |
| Silicon, Si | 1 |
| Copper, Cu | 0.20 |
| Manganese, Mn | 1 |
| Carbon, C | 0.12 |
| Zirconium, Zr | 0.15 |
| Sulfur, S | 0.010 |
| Boron, B | 0.0030-0.010 |
Nimonic 105 Mechanical Properties: precipitation hardened condition
| Properties | Metric | Imperial |
| Tensile strength | 1150 MPa | 167000 psi |
| Yield strength | 770 MPa | 112000 psi |
| Elongation at break | 25% | 25% |
Heat Treatment
Nimonic 105 can be heat treated in 4 four steps. The steps are as follows:
Solution annealing for 4 h at 1149°C (2100°F) followed by air cooling.
Heating for 16 h at 1056°C (1925°F) followed by air cooling.
Heating for 16 h at 849°C (1560°F).
Air cooling to reach precipitation-hardening.
Nimonic 105 Specifications
- BS HR3
- WS 2.4634
- MSRR 7017
- MSRR 7018
- Nimonic 105