1.4542 (X5CrNiCuNb16-4) is a well-established precipitation hardening martensitic stainless steel capable of achieving very high strength and hardness after a relatively simple heat treatment. It offers excellent corrosion resistance combined with a structured range of mechanical property levels depending on the precise heat treatment applied. It is readily machined and fabricated in the softer tempers and can then be heat-treated to exceptional strength and dimensional stability. It shows the following features and properties:

  • Very high strength
  • Very good resistance to pitting and crevice corrosion
  • Excellent resistance to chloride stress corrosion cracking
  • Good workability and weldability
  • Related Standards

    Equivalent Materials

    Chemical properties


    Weight %






    17 %


    4 %


    4 %


    0.3 %



    Technological properties

    Application areas

    Offshore & marine: Offshore foils, helicopter deck platforms, pump shafts, couplings, fasteners, valve parts and spindles;Aerospace: Turbine blades, missile and rocket fittings, undercarriage components and fasteners;Other: Nuclear waste casks, medical instruments, paper mill equipment and chemical process plant, springs, screws, bolts, gears, bushes and wear rings

    Corrosion properties

    Very high corrosion resistance

    General machinability

    It is readily machinable

    This material data has been provided by Columbia Metals.

    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.