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