15-5PH AMS 5659

15-5 PH AMS 5659 stainless steel is a martensitic precipitation-hardening stainless steel which maintains a high strength to approximately 600 °F.  Compared to 17-4 PH, it offers better transverse toughness and ductility: better mechanical properties in larger cross-sections, and better forgeability.

Stock sizes: 0.375” to 8.000” diameter

Common Specifications:

  • AMS 5659 TYPE 1
  • Pratt & Whitney LCS F-17
  • General Electric S-400 / S-SPEC-35
  • ASTM-A484
  • ASTM-A564; CAP. OF H900
  • ASME-SA564; CAP. OF H900

Common Applications:

  • Aerospace structural components
  • Shafts and gears
  • Fasteners
  • Valves

Industry Trade Names:

  • XM-12
  • 15-Cr-5Ni
  • UNS S15500

Composition

Element Min. Max.
Carbon — 0.07
Manganese — 1.00
Silicon — 1.00
Phosphorus — 0.030
Sulfur — 0.015
Chromium 14.00 15.50
Nickel 3.50 5.50
Molybdenum — 0.50
Copper 2.50 4.50
Columbium (Niobium) 5xC 0.45