Alloy 90 / NIMONIC® 90 – Properties, applications and technical data
Alloy 90, also known as NIMONIC® 90, is an age-hardenable nickel-cobalt-chromium superalloy developed for high strength, good oxidation resistance and very good creep resistance at high temperatures.
The material is often used in hot gas zones and components that are exposed to long-term thermal stress, for example in gas turbines and other high-temperature equipment where operational reliability is crucial.
Properties of Alloy 90 / NIMONIC® 90
Alloy 90 is precipitation hardening and is reinforced with titanium and aluminum, among other elements, which provides high strength and good creep properties at elevated temperatures. The addition of cobalt contributes to improved hot strength and stability during long-term operation.
The alloy has good resistance to oxidation and hot corrosion in oxidizing environments, and is well suited for components where both mechanical performance and temperature resistance are required.
- Type: Age-hardenable nickel-based superalloy
- Alloy: Ni-Co-Cr-Ti-Al (Alloy 90 / NIMONIC® 90)
- Structure: Austenitic nickel-based superalloy
- Designations: Alloy 90, NIMONIC® 90, UNS N07090, Werkstoffnr 2.4632, AMS 5708
Advantages
- High strength at elevated temperatures
- Very good creep and fracture toughness under long-term thermal stress
- Good oxidation resistance
- Stable microstructure in high-temperature operation
- Suitable for demanding turbine components
Limitations
- Higher material cost than standard nickel and stainless alloys
- Requires controlled heat treatment for optimal performance
- Not intended for extremely sulfur-rich environments at very high temperatures
Typical applications
Gas turbines
Turbine blades, ring segments and other components in hot gas zones.
Aerospace and energy sector
High-temperature components where low deformation and good hot strength is required.
Industrial heating systems
Parts exposed to long-term thermal stress and oxidizing atmospheres.
Corrosion and oxidation resistance
Alloy 90 / NIMONIC® 90 offers good resistance to oxidation and hot corrosion in oxidizing high-temperature environments. The alloy is designed to maintain mechanical performance and structural stability even under prolonged exposure.
Environments where Alloy 90 / NIMONIC® 90 performs well:
- Oxidizing high temperature environments
- Long-term thermal loading
- Hot gas zones in turbine systems
- Applications with high creep strength requirements
Environments to avoid:
- Extremely sulfur-rich environments at very high temperatures
- Applications outside the alloy's temperature design
- Applications where simpler materials provide sufficient performance (cost aspect)
Technical data (obsolete) state)
| Yield strength (0.2%) |
~650–900 MPa |
| Tensile strength |
~950–1200 MPa |
| Elongation at break |
~10–20% |
| Density |
~8.18 g/cm³ |
| Modulus of elasticity |
~210 GPa |
| Recommended maximum temperature |
≤920°C |
| Weldability |
Good – method selection and post-weld heat treatment may be required depending on the requirements |
With a global network of reliable suppliers, we offer customized solutions and fast access to the right nickel-based superalloy for your needs.
Contact us if you need technical advice or want a quote – we will help you find the right material for your application.
Buy Alloy 90 / NIMONIC® 90 from HARALD PIHL – your specialist in high-performance alloys with global delivery.
Our strengths
- Certified according to ISO 9001 and AS9120
- Materials for aerospace, defense and medical technology
- Complies with AD 2000, PED as well as ASTM and ASME
- Full traceability according to EN 10204 3.1
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