AerospaceAutomotiveMarine & DefenceOil & GasStainless Steel


17-4PH 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. 17-4PH is widely used in the chemical, petrochemical, offshore, paper, food, and aerospace industries making best use of its outstanding corrosion resistance, wear resistance, strength and hardness.

Columbia Metals stocks 17-4PH in solution annealed Condition A.

Related Specifications of 17-4PH

  • S17400
  • AISI 630
  • NACE MR 0175
  • ASTM A484
  • ASTM A564
  • AMS 2303
  • AMS 5643
  • ASME SA564
  • 1.4542
  • X5CrNiCuNb16-4

Nominal Composition of 17-4PH

Fe rem, Cr 17.0%, Ni 4.0%, Cu 4.0%, Nb & Ta 0.3%

Key Features of 17-4PH

  • Excellent strength and hardness
  • Very high corrosion resistance
  • Outstanding wear resistance
  • Good welding characteristics

Applications of 17-4PH

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

Columbia Metals – a leading supplier of 17-4PH

With decades of experience and a huge range of stock, Columbia Metals is an industry leader in the supply of 17-4PH and other high quality specialist engineering alloys.

To buy or learn more about 17-4PH contact us now, or fill in the enquiry form on the right hand side and we will be in touch shortly.

Click here to download a 17-4PH data sheet.

  Related Specifications Mechanical Properties
Alloy Name BS UNS BS EN Others Ultimate Tensile Strength N/mm² Minimum Yield Strength N/mm² Elongation % Hardness HB  
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