15-5 PH

The 15-5 PH alloy was designed to have greater toughness than 17-4 PH. The 15-5 PH alloy is martensitic in structure in the annealed condition and is further strengthened by a relatively low temperature heat treatment which precipitates a copper containing phase in the alloy. 15-5 PH is also referred to as XM-12 in some specifications.


15-5 PH Plate, 15-5 PH Round Bar

Common Trade Names

15-5 Stainless, 15-5 PH


  • Precipitation Hardening
  • High Strength
  • Moderate corrosion resistance to 600°F


  • Aerospace applications
  • Chemical and petrochemical applications
  • Pulp and paper
  • Food processing