17-7PH AMS 5644

17-7 PH AMS 5644 is a semi-austenitic precipitation-hardening stainless steel that provides good corrosion resistance, good formability, and high strength.  It is commonly supplied in the annealed condition with capability to harden to high strength levels by heat treating to Conditions RH 950 and TH 1050.  17-7PH provides exceptional mechanical properties at temperatures up to 900 °F.

Stock sizes: 0.375” to 3.500” diameter

Common Specifications:

  • AMS 5644
  • ASTM-A564
  • General Electric S-400 / S-SPEC-35

Common Applications:

  • Springs
  • Washers
  • Blades
  • Fluid seal springs

Composition

Element Min. Max.
Carbon 0.09
Manganese 1.00
Silicon 1.00
Phosphorus 0.040
Sulfur 0.030
Chromium 16.00 18.00
Nickel 6.50 7.75
Aluminum 0.75 1.50