# Alloy 80A (UNS N07080) High-Temperature Nickel-Chromium Alloy
## Introduction to Alloy 80A
Alloy 80A, also known as UNS N07080, is a high-temperature nickel-chromium alloy that offers excellent resistance to oxidation and corrosion at elevated temperatures. This alloy is widely used in applications where high strength and durability are required under extreme thermal conditions.
## Chemical Composition
The chemical composition of Alloy 80A plays a crucial role in its performance characteristics:
Nickel (Ni): 70-80%
Chromium (Cr): 18-21%
Aluminum (Al): 1.0-2.0%
Titanium (Ti): 1.8-2.7%
Iron (Fe): ≤ 3.0%
Manganese (Mn): ≤ 1.0%
Silicon (Si): ≤ 1.0%
Carbon (C): ≤ 0.1%
## Key Properties of Alloy 80A
### High-Temperature Strength
Alloy 80A maintains excellent mechanical properties at temperatures up to 815°C (1500°F), making it ideal for high-temperature applications.
### Oxidation Resistance
The high chromium content provides outstanding resistance to oxidation in both continuous and intermittent service at high temperatures.
### Creep Resistance
This alloy demonstrates superior creep rupture strength, which is essential for components subjected to prolonged stress at elevated temperatures.
## Applications of Alloy 80A
Used in turbine blades, combustion chambers, and other critical components of jet engines.
Employed in gas turbine components, heat exchangers, and boiler parts in power plants.
Ideal for furnace components, heat treatment fixtures, and radiant tubes due to its high-temperature capabilities.
## Fabrication and Heat Treatment
Keyword: Alloy 80A UNS N07080
Alloy 80A can be readily fabricated using standard techniques, although it work hardens rapidly. The alloy is typically solution annealed at 1080-1120°C (1975-2050°F) followed by rapid cooling to achieve optimal properties.
## Comparison with Similar Alloys
While both are nickel-chromium alloys, Alloy 80A offers superior high-temperature strength and creep resistance due to its aluminum and titanium additions.
Alloy 80A has better mechanical properties at elevated temperatures but is slightly less resistant to certain corrosive environments compared to Alloy 600.
## Conclusion
Alloy 80A (UNS N07080) is an exceptional high-temperature nickel-chromium alloy that combines excellent oxidation resistance with superior mechanical properties at elevated temperatures. Its unique combination of characteristics makes it indispensable in demanding applications across aerospace, power generation, and industrial heating sectors.
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