17-7PH stainless steel

Q1: What is 17-7PH stainless steel?

A1: A precipitation-hardening (PH) stainless steel with ~17% Cr and ~7% Ni, offering high strength, good corrosion resistance, and excellent formability after heat treatment.

 

Q2: Key mechanical properties (RH950 condition)?

A2: Tensile strength ≥1380 MPa, yield strength ≥1240 MPa, hardness ≥42 HRC, elongation ≥5%-ideal for high-stress applications.

 

Q3: Main heat treatment conditions?

A3: 4 core conditions:

RH950: Highest strength

RH1015: Balanced strength/toughness

RH1075: Enhanced ductility

TH1050: Maximum corrosion resistance (for welded parts)

 

Q4: Common industries/applications?

A4: Aerospace, defense, medical devices, precision engineering (springs, fasteners, aircraft components, surgical tools).

 

Q5: How does it differ from 17-4PH?

A5: 17-7PH has higher strength and better formability; 17-4PH offers superior corrosion resistance in mild environments. Choose 17-7PH for high-precision, high-load use.