17-7 PH Stainless Steel

UNS S17700 stainless
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Precipitation-hardening semi-austenitic stainless steel combining high strength with good corrosion resistance. Supplied in Condition A and aged to CH900–TH1050.

Applicable Standards

  • AMS 5528
  • AMS 5529
  • ASTM A693

Composition Ranges (wt %)

Element Min (%) Max (%) Typical Range
Fe 70.0 80.0 ~75.0
Cr 16.0 18.0 ~17.0
Ni 6.5 7.75 ~7.12
Al 0.75 1.5 ~1.12
Mn — 1.0 ~0.5
C — 0.09 ~0.04
Fe 70.0–80.0% Cr 16.0–18.0% Ni 6.5–7.75% Al 0.75–1.5% Mn 0.0–1.0% C 0.0–0.09%

Typical Applications

  • Springs and clips
  • Aircraft components
  • Diaphragms and bellows
  • Hydraulic tubing
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