A precipitation hardenable chromium-nickel-copper stainless, Alloy 15-5 offers an outstanding combination of high strength and excellent corrosion resistance.

15-5 Stainless Steel is a martensitic precipitation-hardening stainless steel that provides an outstanding combination of high strength, good corrosion resistance and good mechanical properties at temperatures up to 316°C.

  • UNS Number: S15500
  • Werkstoff Number: 1.4545
  • ASTM: A564, A693, A705

Product availability

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Chemical analysis



  • Aerospace applications
  • Oil and gas applications

About Alloy 15-5

Alloy 15-5 was designed to have high strength with superior toughness than 17-4 PH. Alloy 15-5 is martensitic in structure in the annealed condition (ferrite free) and is further strengthened by a relatively low temperature heat treatment which precipitates a copper containing phase in the alloy. Alloy 15-5 is also referred to as XM-12 in some specifications.

To find out more about 15-5 stainless steel then contact us, or fill in our online quote form and we’ll get right back to you!

  • Density: 7.75 g/cm³
  • Poisson's ratio : 0.272
  • Electrical resistivity: 9.79x10^-7

Mechanical & Physical Properties

Mechanical & Physical Properties21.1°C93°C427°C
Coefficient of Thermal Expansion, µm/m⁰C--11.4
Thermal Conductivity/ kcal/(hr.m.°C)-15.8-
Modulus of Elasticity/ x105 MPa1.97--

Minimum Specified Properties, ASTM A564

Minimum Specified Properties, ASTM A564
Ultimate Tensile Strength/MPa-
0.2% Yield Strength/Mpa-
Reduction of area /%-
Hardness, Brinell363(MAX)
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