Stainless Steel Alloy 15-5 PH, UNS S15500, XM-12

15-5 PH, also known as also known as UNS S15500 or XM-12,is a martensitic, precipitation hardening stainless steel. Popular due to its high strength and good corrosion resistance, 15-5 PH also offers user a host of other benefits:

  • Good mechanical properties at temperatures up to 600°F (316°C)
  • Excellent longitudinal and transverse toughness
  • Good in corrosive and high-pressure environments
  • Equivalent weldability to 17-4 PH with greater toughness
  • Low temperature hardening

Because of these outstanding characteristics, 15-5 PH is used to create gears, shafts, fittings, valves, cylinders, engine parts, and fasteners for a wide range of industries including:

  • Aerospace
  • Petrochemical
  • Chemical
  • Food Processing
  • Pulp and Paper

In order to be sold as 15-5 PH stainless steel, an alloy must have a certain composition that includes:

  • Fe Balance
  • Cr 14-15.5%
  • Ni 3.5-5.5%
  • Cu 2.5-4.5%
  • Si 1.0% max
  • Mn 1.0% max
  • Cb+Ta 0.15%-0.45%

Continental Steel can supply 15-5 PH in a number of popular shapes and sizes. As with all the products we sell, our selection of 15-5 PH stainless steel meets or exceeds all critical industry standards and specifications.

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