Nickel Alloy Nimonic 80

  • Nickel Alloy Nimonic 80
  • General Characteristics

    NIMONIC 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). It is produced by high-frequency melting and casting in air for forms to be extruded. Electroslag refined material is used for forms to be forged.  Vacuum refined versions are also available. NIMONIC alloy 80A is currently used for gas turbine components (blades, rings and discs), bolts, nuclear boiler tube supports, die casting inserts and cores, and for automobile exhaust valves.

  • Typical Chemical Composition

    Weight % C Cr Si Cu Fe Mn Ti Al Co B Zr Pb S Ni
    Minimum 18.0 1.8 1.0 Bal
    Maximum 0.10 21.0 1.0 0.2 3.0 1.0 2.7 1.8 2.0 0.008 0.15 0.0025 0.015
  • Physical Properties

    Characteristics English Metric
    Nominal density 20°C   /   68°F 0.296 lbs/in3 8.19 g/cm3
    Melting range 2410-2490 °F 1320-1365 °C
    Specific heat 21°C   /   70°F 0.107 BTU/lb – °F 448 J/KG- °K
    Average coefficient of thermal expansion

    From 70°F to temperature,

    heat treated 8 hours/

    1080°C (1976°F)/

    air cooled + 16 hours /

    700°C (1292°F)/ air cooled.

    100°C  /  212°F 7.31 micro in/in- °F 13.2 micro m/m- °K
    300°C  /  572°F 7.53 micro in/in- °F 13.6 micro m/m- °K
    500°C  /  932°F 7.74 micro in/in- °F 13.9 micro m/m- °K
    700°C  /1292°F 7.97 micro in/in- °F 14.3 micro m/m- °K
    900°C  /1652°F 8.39 micro in/in- °F 15.1 micro m/m- °K
    Thermal conductivity 100°C  /  212°F 6.71 BTU/ft- hr – °F 11.6 W/m – °K
    300°C  /  572°F 9.31 BTU/ft- hr – °F 16.1 W/m – °K
    500°C  /  932°F 11.2 BTU/ft- hr – °F 19.4 W/m – °K
    700°C  /1292°F 12.9 BTU/ft- hr – °F 22.3 W/m – °K
    900°C  /1652°F 15.3 BTU/ft- hr – °F 26.5 W/m – °K
  • Mechanical Properties

    Condition Tensile
    Ultimate Yield Elongation in 50 mm (2 in.)
    KSI MPa KSI MPa %
    Precipitation Hardened.

    Value at room temperature

    181 1250 113 780 30
    Precipitation Hardened prior to

    test 650°C (1200°F)

    149 1030 103 710 30
  • Specifications

    • ASTM – B637
    • BS – 3076 & HR 1

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