Nimonic 90 (UNS N07090 / W.Nr. 2.4632) is a precipitation hardenable nickel-chromium-cobalt alloy strengthened by the addition of Titanium and Aluminium. Alloy 90 has a high stress rupture strength and creep-resistant at temperatures to 920°C.
Nimonic 90 Features
Nimonic 90 has a high stress rupture strength and creep-resistant at temperatures to 920°C.
Nimonic 90 Applications
Nimonic 90 is typically used in extreme stress applications such as turbine blades, hot working tools, exhaust reheaters, disc and high-temperature springs.
Nimonic 90 Specifications
| UNS | W. Nr | Trademark | GB | DIN | NF |
| N07090 | 2.4632 | Nimonic 90 | GH4090 | NiCr20Co18Ti | NC20T |
Chemical Compositions of Nimonic 90 Nickel Alloy
| C | Si | Mn | P | S | Cr | Ni | Co | AI | Ti | Cu | Fe |
| ≤0.13 | ≤1.00 | ≤1.00 | ≤0.020 | ≤0.015 | 18.0-21.0 | Bal | 15.0-20.0 | 1.0-2.0 | 2.0-3.0 | ≤0.20 | Bal |
Typical Physical and Mechanical Properties (RT, Annealed)
| Density, g/cm3 | Melting Point, ℃ | Tensile Strength, MPa | Yield Strength, MPa | ELongation, % | Hardness, HRB |
| 8.18 | 1310-1370 | ≥1080 | ≥690 | ≥20 | / |
Nimonic 90 Product Forms and Standards
| Rod, Bar, Wire and Forgings | BS HR2, HR501, HR503, AMS 5829 |
| Plate, Sheet and Strip | BS HR 202 |
| Pipe and Tube | BS HR 402 |