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Stainless Steel Alloy 17-4 PH, UNS S17400

Special Alloys > Stainless Steel Alloy 17-4 PH, UNS S17400

Stainless Steel Alloy 17-4 aka UNS S17400 is a precipitation-hardening metal. The alloy contains a strong combination of excellent corrosion resistance and high strength.

The martensitic alloy composes following ingredients in its fabrication-

  • Iron- In balanced form
  • Chromium- Between 15-17%
  • Nickel- Between 3-5%
  • Copper- Between 3-5%
  • Manganese- Up to 1.5% max
  • Silicon- Up to 0.7% max
  • Niobium- Up to 0.45% max

Benefits of Stainless Steel Alloy 17-4-

  • Excellent blending of oxidation and corrosion resistance
  • Mechanical properties sustaining at temperatures up to 316°C
  • High strength and toughness
  • Used in industries like aerospace, chemical, food processing, metal working, etc


  • Marine Parts including propeller shafts and sailboat self steering systems)
  • Molding dies
  • Nuclear waste casks
  • Turbine blades
  • Valves
  • Fasteners
  • Gears
  • Castings
  • Fittings

Special Alloys is a proud supplier of 17-4 PH stainless steel in different shapes and sizes, meeting the highest industrial standards.

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