Alloy 80A (nimonic) is a nickel-chromium alloy with additions of titanium and aluminium, which enable it to be strengthened by precipitation hardening. This grade is supplied in the solution treated condition for ease of machinability, but an aging treatment will give the material very high mechanical properties, an outstanding resistance to creep at service temperatures up to 815ºC (1500ºF) and a high resistance to fatigue under very arduous conditions.
Alloy 80A offers excellent corrosion resistance in oxidising atmospheres including under cyclical conditions of heating and cooling. This corrosion resistance can be attributed to an adherent chromium oxide film (CrO3) that forms on the alloy surface, which protects it from progressive corrosion and also gives a high scaling resistance at elevated temperatures.
Alloy 80A offers a good machinability, is readily formable and weldable using common welding methods.
Related Specifications of Alloy 80A
- BS3076 NA20
- BS2 HR1
- 2.4631
Nominal Composition of Alloy 80A
Ni 75.0%, Cr 20.0%, Fe 3.0% max, Ti 2.2%, Al 1.4%
Mechanical Properties of Alloy 80A
| Ultimate Tensile Strength (N/mm²) | Proof Stress (N/mm²) | Elongation (%) | Hardness (HB) |
|---|---|---|---|
| 1000 | 620 | 20 |
Key Features of Alloy 80A
- Excellent corrosion resistance
- Outstanding creep resistance up to 815ºC
- Excellent mechanical properties obtained via aging
- Good machinability
- Formability and weldability
Applications of Alloy 80A
Aerospace | Turbine components such as blades, rings, discs and fasteners
Power Generation | Bolts, gas turbine components and other highly stressed components operating at elevated temperatures
Other | Combustion engine exhaust valves, die casting cores and inserts; high temperature springs
Columbia Metals – a leading supplier of Alloy 80A
With decades of experience and a huge range of stock, Columbia Metals is an industry leader in the supply of Alloy 80A and other high quality specialist engineering alloys.
To buy or learn more about Alloy 80A contact us now, or fill in the enquiry form on the right hand side and we will be in touch shortly.
