A precipitation hardenable chromium-nickel-molybdenum martensitic stainless grade, Alloy 13-8 has excellent strength.

Alloy 13-8 stainless is a martensitic precipitation hardening stainless steel that has excellent strength, hardness, toughness and good corrosion resistance.

  • UNS Number: UNS S13800
  • Werkstoff Number: 1.4534
  • ASTM: A564
  • AMS: 5629

Product availability

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Chemical analysis



  • Aerospace components
  • Injection molding equipment
  • Components in the petrochemical and nuclear industries
  • Motorsport components

About Alloy 13-8

Good transverse toughness properties are achieved by tight chemical composition control, low carbon content, and vacuum melting.

Alloy 13-8 stainless is usually available in an annealed condition, also known as solution heat condition or Condition A. In order to allow a complete martensitic transformation, the alloy is solution treated at 913-940°C for 15 to 30 minutes followed by air cooling or oil quenching to below 15.5°C. Aging temperature and time vary depending on the desired final properties, see Heat Treatment Conditions Table below.

Typical applications are large airframe structural components, motorsport components and injection molding equipment.

To learn more about Alloy 13-8 stainless steel contact us, or fill in our online quote form and we’ll get right back to you!

  • Density: 7.723 g/cm³
  • Melting range: 1404.4-1471.1°C
  • Electrical resistivity: 1.02 x10<sup>-6</sup> Ωm

Mechanical & Physical Properties

Mechanical & Physical Properties21°C100°C200°C300°C
Coefficient of Thermal Expansion, µm/m⁰C1313.514
Thermal Conductivity/ kcal/(hr.m.°C)12.813.714.615.5
Modulus of Elasticity/ 10^-5 MPa21.941.861.8

Mechanical Properties, Various Aged Conditions

0.2 Offset Yield Strength/ ksi20519017516513590
Ultimate Tensile Strength/ ksi220205185175150135
Elongation in 2″/ %101011121414
Reduction of Area, % (Longitudinal)455050505050
Reduction of Area/ % (Transverse)455050505050
Reduction of Area/ % (Short-Transverse)354045455050
Min. Hardness/ Rockwell4543-403430

Heat Treatment Conditions

Temperature/ °C511+/-5537+/-5551+/-5565+/-5593+/-5621+/-5
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