Monel Alloy K500 Nickel Alloy

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2.4375 (NiCu30Al) is a precipitation hardening nickel copper alloy that retains the excellent corrosion resistance of Monel Alloy 400 with the added advantage of increased strength and hardness values that can be maintained up to 650ºC. It is widely used in marine environments due to its excellent corrosion resistance, and is often utilised in high-velocity seawater and in stagnant or slow-moving seawater. It shows the following features and properties:

  • Excellent strength and toughness levels
  • Excellent corrosion resistance in marine environments
  • Good resistance to non-oxidising acids, alkali and salts
  • High retention of properties at elevated temperatures
  • Related Standards

    Equivalent Materials

    This material data has been provided by Matmatch.

    "Typical" values were obtained via a literature search. "Predicted" values were imputed via artificial intelligence technology. While we have placed significant efforts in ensuring data accuracy, "typical" and "predicted" data should be considered indicative and verified by appropriate material testing. Please do contact us if additional information on the the predicted data method is required.
    All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
    Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

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    23.0 °C

    8.44 g/cm³

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    Elastic modulus

    23.0 °C

    179 GPa

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    23.0 °C

    14 - 20 %

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    Hardness, Rockwell C

    23.0 °C

    27 - 35 [-]

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    Tensile strength

    23.0 °C

    970 - 1000 MPa

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    Yield strength Rp0.2

    23.0 °C

    690 - 760 MPa

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    Coefficient of thermal expansion

    23.0 °C

    1.34E-5 1/K

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    Melting point

    1315 - 1350 °C

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    Thermal conductivity

    23.0 °C

    17.5 W/(m·K)

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    Specific Electrical conductivity

    28 % IACS

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    Chemical properties



    2.3 - 3.15 %

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    27 - 33 %

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    2 %

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    63 %

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    min., (Ni+Co)


    0.35 - 0.85 %

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    Technological properties

    Application areas

    Offshore & marine: Marine propeller shafts, pump shafts, impellers, valve trim, drill collars, high strength fasteners and bolting;Other: Oil well surveying equipment, cryogenic equipment springs and electronic components

    Cold Forming

    It can be cold worked

    Corrosion properties

    Excellent corrosion resistance in marine environments

    General machinability

    It is readily machinable

    Hot forming

    It can be hot worked