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Alloy 80A

  • Material

    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.

  • Overview

    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). 

  • Characteristics

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

  • Application

    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.

  • Chemical Composition (wt%)

    Material

    Fe

    Ni

    Co

    Cr

    Zr

    Ti

    Pb

    B

    Alloy 80A

    ≤1.50

    Balance

    ≤2.0

    18.0-21.0

    ≤0.15

    1.80-2.70

    ≤0.0025

    ≤0.008

    Material

    Cu

    C

    Al

    Mn

    Si

    P

    S

     

    Alloy 80A

    ≤0.20

    0.04-0.10

    1.00-1.80

    ≤1.00

    ≤1.00

    ≤0.020

    ≤0.015

  • Mechanical Property

    Tensile strength

    ksi (MPa)

    Yield strength at

    0.2 offset ksi (MPa)

    Elongation at fracture

    135 (930)

    87 (600)

    20%

  • Corrosion Resistance

    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.

  • Available Process

    (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.)


  • Common Tests

    Chemical composition

    Tension

    Hardness

    Flaring

    Flange

    Flattening

    Micro structure

    Hydrostatic

    NDT

    Intergranular Corrosion

    Surface condition

    Shape and dimension

    Positive Material Identification

  • Product Forms

    Form

    Size range

    Capillary tube

    OD 0.08 ~ 6.0 mm

    WT 0.015 ~ 1.5 mm

    Thin wall & Ultra thin wall seamless tube

    OD6.0 ~80.0 mm

    WT 0.05 ~4.5 mm

    Micro ID and heavy thick wall seamless tube

    OD3.0 ~50.0 mm

    ID 0.30 ~5.0 mm

    Precision conic seamless tube

    Bigger end: OD3.0 - 426.0mm

    Smaller end: OD2.5 - 346.0mm

    WT: 0.15 - 40.0mm

    HP /UHP BA+ tube

    EP tube

    OD 1.0 ~ 76 mm

    WT 0.10 ~ 10.0 mm

    Small caliber precision seamless tube

    OD6.0 ~89 mm

    WT 0.50 ~9.0 mm

    Profiled seamless tube

    Build to drawing

    Build to specification

    Bourdon tube

    Y40, Y50, Y60, Y70, Y100, Y150

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