17.4PH®1.4542 – UNS S17400 – X5CrNiCuNb 16 4

17-4 PH® alloy is a martensitic precipitation-hardening stainless stee with Cu and Nb/Cb additions, that provides an outstanding combination of high strength, good corrosion resistance, good mechanical properties at temperatures up to 600°F (316°C), good toughness in both base metal and welds, and short-time, low-temperature heat treatments that minimize warpage and scaling. This versatile material is widely used in theaerospace, chemical, petrochemical, foodprocessing, paper and general metalwork-ing industries.


seamless-pipe Seamless Tubes

welded-pipe Welded Tubes
plate Plates
bar Bars  stock
flanges Flanges
accessories Fittings


  • Pump Shafts
  • Propeller Shafts
  • Gear Wheels
  • Bearing , bolts, spindles, foils
  • Deck platform
  • Turbine Blades
  • Mechanical components
  • Nuclear waste casks
  • Valve internal components
  • Pulp & Paper industry products
  • Temperature sensor products

General characteristics

  • High tensile strength and hardness to 660ºF (316ºC)
  • Good corrosion resistance
  • Excellent oxidation resistance to 1.100ºF (593ºC)
  • Simple low-temperature heat treatment
  • Creep-rupture strength to 900ºF (482ºC)

Technical information



17.4PH® – UNS S17400
Seamless Tubes  
Welded Tubes
Bars A-564

Chemical specifications %


17.4PH® – UNS S17400
Element Simbol Maximum
Carbon C 0,07
Manganese Mn 1,0
Phosphorus P 0,040
Sulfur S 0,030
Silicon Si 1,00
Nickel Ni 3,0-5,0
Chrome Cr 15,0-17,5

Mechanical Properties

17.4PH® – UNS S17400
Norm Rm min. Rp 0,2% min. E4d min.% Z min.% T.I.(J) HR B HB
A-564(*) 135 (930) 105 (725) 16 50 41 28 277