Alloy 80A NIMONIC® 80A – W. Nr. 2.4952 / UNS N07080 / ASTM B637
Alloy 80A NIMONIC® 80A
Alloy 80A NIMONIC® 80A is a precipitation-hardenable nickel-chromium alloy, strengthened by additions of titanium, aluminum, and carbon, designed to provide high performance at temperatures up to 815°C (1500°F). The alloy is produced by high-frequency melting and air casting for extruded forms, or by electroslag or vacuum refining for forged products.
Thanks to its excellent mechanical strength and corrosion resistance, NIMONIC® 80A is used in gas turbine components, supports for nuclear boilers, inserts for die-casting molds, automotive exhaust valves, and other high-temperature applications.
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Reference standards:
- ASTM B637 (bars and forgings)
- BS 3076, HR1, 201, 401, 601
- AECMA PrEn 2188, 2189, 2190, 2396, 2397
- DIN 17742, AFNOR NC 20TA
Chemical composition (%)
| Element | Content (%) |
|---|---|
| Nickel (Ni) | Balanced |
| Chromium (Cr) | 18.0 – 21.0 |
| Titanium (Ti) | 1.8 – 2.7 |
| Aluminum (Al) | 1.0 – 1.8 |
| Iron (Fe) | 3.0 max |
| Cobalt (Co) | 2.0 max |
| Manganese (Mn) | 1.0 max |
| Silicon (Si) | 1.0 max |
| Copper (Cu) | 0.2 max |
| Sulfur (S) | 0.015 max |
| Carbon (C) | 0.10 max |
| Boron (B) | 0.008 max |
| Zirconium (Zr) | 0.15 max |
Mechanical properties
| Temperature (°C) | Tensile strength (MPa) | Yield strength (MPa) | Elongation (%) |
|---|---|---|---|
| 20 | 1163 | 720 | 52 |
| 600 | 738 | 547 | 43 |
| 800 | 630 | 420 | 39 |
| 1000 | 512 | 310 | 32 |
Heat treatments
- Solution annealing: 1080°C for 8 hours with air cooling + 16 hours at 700°C.
- Alternative for improved properties: 8 hours at 1080°C + 24 hours at 850°C + 16 hours at 700°C.
- For sheet metal: 2-3 minutes at 1150°C (quenching) + 20 minutes at 1040°C + 4 hours at 750°C.
Available formats
NIMONIC® Alloy 80A is available in the following forms:
Industrial applications
Thanks to its resistance to oxidation and hot deformation, NIMONIC® 80A is ideal for:
- Aerospace and Defense: Gas Turbine Components, Discs and Rings.
- Power Generation: Nuclear boiler supports and high temperature resistant piping.
- Chemical and Pharmaceutical Industry: Components for high-temperature systems and reactors.
- Motorsport: High Performance Exhaust Valves.
- Nuclear: Components resistant to high levels of irradiation and temperatures.
- Oil & Gas: Corrosion- and high-temperature-resistant pipes and coatings.
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