Nimonic 90: precipitation-hardenable nickel-chromium-cobalt superalloy offering high stress-rupture strength and creep resistance up to 920°C (1688°F), good oxidation resistance, age-hardenable gamma prime strengthening, and excellent high-temperature spring performance for turbine blades, discs, fasteners, and springs. UNS N07090. W.N.r 2.4632. AMS 5829.
Nimonic 90 Alloy（UNS N07090 W.Nr. 2.4632 NiCr20Co18Ti）
Nimonic 90 is a precipitation-hardened nickel-chromium-cobalt alloy developed for exceptional strength and oxidation resistance at elevated temperatures. Reinforced with titanium and aluminum, this advanced superalloy provides excellent creep resistance, high fatigue strength, and long service life in extreme thermal environments.
Nimonic 90 is widely used in aerospace engines, gas turbines, power generation systems, and automotive high-performance components where reliability under high stress and temperature is essential.
Key Features
- Excellent high-temperature strength up to approximately 920°C (1688°F)
- Outstanding oxidation and corrosion resistance
- High creep rupture strength for extended service life
- Superior fatigue resistance under thermal cycling
- Excellent mechanical stability at elevated temperatures
- Suitable for severe high-pressure and high-heat environments
Applications
Upgraded Nimonic 90 is ideal for high-temperature environments requiring exceptional strength and oxidation resistance.
Aerospace Industry
- Gas turbine blades
- Jet engine components
- Turbine discs
- Exhaust systems
- Fasteners for high-temperature assemblies
Automotive Industry
- Turbocharger rotors
- Exhaust valves
- High-performance engine components
Power Generation & Industrial Applications
- Gas turbine hot-section components
- Heat treatment fixtures
- Industrial furnace hardware
- High-temperature springs and fasteners
View more nickel alloy products
Learn more about Nimonic alloy properties
UNS | EN | C | Si | Mn | P | S | Cr | Ni | Fe | Cu | Ti | Al | Co | Other | |
N07090 | 0.13 | 0.8 | 0.4 | 0.02 | 0.15 | 18-21 | rest | <1.5 | <0.2 | 2-3 | 1-2 | 15-21 | B<0.02 | ||
0.1 | 1 | 1 | 0.02 | 0.15 | 27-30 | rest | <1 | <0.5 | 1.9-2.7 | 0.9-1.5 | 19-21 | Nb0.4-1.1 | |||
Comparison Table: Nimonic 75 Nimonic 80A Nimonic 90
| Element (wt%) | Nimonic 75 (UNS N06075) | Nimonic 80A (UNS N07080) | Nimonic 90 (UNS N07090) |
|---|---|---|---|
| Nickel (Ni) | Balance (~80% min) | Balance (~69%) | Balance (~54%) |
| Chromium (Cr) | 18.0 – 21.0 | 18.0 – 21.0 | 18.0 – 21.0 |
| Cobalt (Co) | — | 2.0 max | 15.0 – 21.0 |
| Titanium (Ti) | 0.2 – 0.6 | 1.8 – 2.7 | 2.0 – 3.0 |
| Aluminum (Al) | — | 1.0 – 1.8 | 1.0 – 2.0 |
| Iron (Fe) | 5.0 max | 3.0 max | 1.5 max |
| Carbon (C) | 0.08 – 0.15 | 0.10 max | 0.13 max |
| Silicon (Si) | 1.0 max | 1.0 max | 1.0 max |
| Manganese (Mn) | 1.0 max | 1.0 max | 1.0 max |
| Copper (Cu) | 0.5 max | 0.2 max | 0.2 max |
| Boron (B) | — | 0.008 max | 0.02 max |
| Zirconium (Zr) | — | 0.15 max | 0.15 max |
| Lead (Pb) | — | 0.0025 max | 0.0020 max |
| Sulfur (S) | — | 0.015 max | 0.015 max |
