15-5PH Stainless Steel

15-5 PH is a martensitic precipitation hardening stainless steel offering excellent corrosion resistance, high strength, and good toughness. Conforming to AMS 5659 and AMS 5862, it is widely used in aerospace and power generation applications where both strength and corrosion resistance are essential.

In aerospace, 15-5 PH is regularly specified for engine parts, structural components, and landing gear. In power generation, it finds application in gas turbine components, valves, and shafts — industries where material reliability under sustained loading is non-negotiable.

The alloy machines, welds, and forms readily, making it practical for complex component geometries. Mechanical properties are developed through a two-stage heat treatment: solution annealing at 1010-1150°C followed by precipitation hardening at around 480°C. This produces a material with tensile strength ranging from 931 MPa in H1150 condition through to 1310 MPa in H900, allowing engineers to select the right balance of strength and toughness for their application.

15-5 PH can be produced via consumable electrode melting (ESR) or Vacuum Arc Remelting (VAR), offering very good transverse properties and consistent performance across section sizes.