15-5PH stainless steel

Q1: What is 15-5PH stainless steel?

A1: A precipitation-hardening (PH) stainless steel with ~15% Cr and ~5% Ni/Cu, offering balanced strength, corrosion resistance, and machinability.

 

Q2: Key mechanical properties (H900 condition)?

A2: Tensile strength ≥1030 MPa, yield strength ≥860 MPa, hardness ≥30 HRC, elongation ≥12%.

 

Q3: Main heat treatment conditions?

A3: 4 core options:

H900: High strength

H1025: Balanced strength/toughness

H1075: Enhanced ductility

H1150: Maximum toughness (welded applications)

 

Q4: Common industries/applications?

A4: Aerospace, oil & gas, industrial machinery, medical devices (fasteners, valves, shafts, surgical instruments).

 

Q5: How does it compare to 17-4PH?

A5: 15-5PH has better formability; 17-4PH offers slightly higher strength. Both suit moderate corrosive environments, with 15-5PH preferred for precision parts.