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Alloy 80A

Alloy 80A, UNS N07080, Ninonic 80A, 2.4631, W.N.2.4952, GH4080A

Note that the designation “Nimonic 80A”is registeredtrademark of the Special Metals Corporation group of companies.

Alloy 80A is a wrought, age-hardenable nickel-chromium alloy, strengthened by additions of titanium, aluminum and carbon, developed for service at temperatures up to 815°C (1500°F). 

Alloy 80A is nickel-chromium alloy with excellent high temperature strength and creep-rupture propertiescombined with good high temperature corrosion and oxidation resistance.

Alloy 80A is currently used for gas turbine components (blades, rings, washers and discs), bolts, nuclear boiler tube supports, die casting inserts and cores, and for automobile exhaust valves.

Additional applications are connecting elements, exhaust valves in combustion engines and other highly stressed components which are used in the aforementioned temperature range.

Alloy 80A has a high resistance to oxidation under cyclic temperature changes. The alloy forms a firmly adhering oxide layer (Cr2O3), which protects against progressive corrosion and oxidation attacks. The alloy is resistant to scaling up to 1000°C (1832°F). The material has proven its resistance to vanadium pentoxide, sodium and sulphur compounds for exhaust valves in engines operated with heavy oil.

(1) Hot formed, solution annealed, descaled

(2) Cold worked and bright annealed

(3) Cold worked, annealed and descaled

(4) Cold worked, polished (MP, EP etc.)

(5) Cold worked, bright annealed, polished (MP, EP etc.)

Chemical composition

Tension

Hardness

Flaring

Flange

Flattening

Micro structure

Hydrostatic

NDT

Intergranular Corrosion

Surface condition

Shape and dimension

Positive Material Identification