Alloy 718 Nickel Alloy

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Description

2.4668 (NiCr19NbMo) is a precipitation hardening nickel-chromium alloy that also contains additions of iron, niobium, molybdenum, aluminium and titanium, providing a unique combination of high strength and corrosion resistance together with excellent weldability. It shows the following features and properties:


  • Excellent tensile, fatigue, creep and rupture strengths across a wide temperature range from around -253ºC to 705ºC
  • Excellent oxidation resistance, up to temperatures of around 980ºC due to the high chromium content
  • Outstanding corrosion resistance in many environments including organic and inorganic acids, other than when strongly oxidising, hydrogen sulphide and sour gases
  • Especially resistant to chloride stress-corrosion cracking
  • Exceptional weldability
  • Related Standards

    Equivalent Materials

    Diese Materialdaten wurden von Matmatch zur Verfügung gestellt

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    Eigenschaften

    Allgemein

    PropertyTemperatureValue

    Dichte

    23.0 °C

    8.22 g/cm³

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    Mechanisch

    PropertyTemperatureValue

    Dehnung

    23.0 °C

    12 - 17 %

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    Elastizitätsmodul

    23.0 °C

    204 GPa

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    Flächenreduzierung

    23.0 °C

    15 %

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    Härte, Brinell

    23.0 °C

    313 - 354 [-]

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    Streckgrenze Rp 0,2

    23.0 °C

    827 - 1034 MPa

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    Zugfestigkeit

    23.0 °C

    1034 - 1276 MPa

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    Thermisch

    PropertyTemperatureValueComment

    Koeffizient der thermischen Ausdehnung

    23.0 °C

    1.35E-5 1/K

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    Schmelzpunkt

    1260 - 1335 °C

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    Wärmeleitfähigkeit

    23.0 °C

    14.2 W/(m·K)

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    for 0-200°C

    Magnetisch

    PropertyTemperatureValue

    Relative magnetische Permeabilität

    23.0 °C

    1 [-]

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    Chemical properties

    PropertyValue

    Aluminium

    0.5 %

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    Chrom

    19 %

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    Eisen

    18 - 18.5 %

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    Molybdän

    3 %

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    Nickel

    53 %

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    Niobium

    5 %

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    Titan

    0.9 %

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    Technological properties

    Property
    Application areas

    Offshore & marine: Fasteners, valves, choke stems, down-hole tooling, cryogenic storage tanks and pump bodies;Aerospace: Jet engine components, rocket motors and thrust reversers;Power generation: Nuclear reactor parts, gas turbine components, nuclear fuel element spacers, containment vessels and valves;Other: Hot extrusion tooling

    Corrosion properties

    Excellent corrosion resistance

    Hot forming

    It can be hot worked between 985-1150°C.