15-5 ph Stainless Steel Bar

15-5 is a variant of the older 17-4 chromium-nickel-copper precipitation hardening stainless steel. Both alloys exhibit high strength and moderate corrosion resistance. High strength is maintained to approximately 600 degrees F. The 15-5 alloy was designed to have greater toughness than 17-4. This improved toughness is achieved by reduced delta ferrite content and control of inclusion size and shape.


  • Aircraft components
  • High pressure corrosive fabricated parts such as valves
  • Shafts
  • Fasteners
  • Fittings and gears

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Typical Chemical Requirements
15-5 PH Stainless Steel Condition A (annealed)
Minimum Properties
Ultimate Tensile Strength, psi 161,000
Yield Strength, psi 140,000
Elongation 7.6%
Rockwell Hardness C35
Iron (Fe) 71.91 - 79.85%
Carbon (C) 0.07% max
Chrome (Cr) 14 - 15.5%
Manganese (Mn) 1% max
Niobium (Nb) + Tantalum (Ta) 0.15 - 0.45% max
Nickel (Ni) 3.5 - 5.5%
Phosphorus (P) 0.04% max
Sulphur (S) 0.03% min
Silicon (Si) 1% max

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