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15-5 PH

Description

Stainless steel 15-5 PH is a modification of 17-4 PH developed in the 1960s. It has a more refined microstructure obtained through the remelting process. This refined structure improves toughness of the material. 15-5PH also has low temperature hardening, good fabrication properties and excellent corrosion resistance, which makes it suitable for many industries. It can be machined in the solution-annealed state or in final heat treat condition. The strength and ductility of 15-5PH can be enhanced through heating the material at different temperatures.
15-5PH is a martensitic precipitation hardening type stainless steel. Martensitic stainless steels were designed to be corrosion resistant and hardened through heat treatment.

Chemical Composition

FeCrNiCuMnSiCPSNb + Ta
7514.54.53.5<1<1<0.07<0.04<0.030.3

Physical Properties

  • Melting Point: 2560 – 2625°F (1404 – 1440°C)
  • Density: 0.282 lbs/in3 / 7.78 g/cm3
  • Modulus of Elasticity in Tension: 28.5 X 106 psi / 196 GPa

Applications

The following are some of the major applications of Grade 15-5 PH stainless steel:

  1. Marine gas turbine compressor sections
  2. Hallow shafts
  3. Paper mill equipment
  4. Engine parts
  5. Aircraft components
  6. Gears
  7. Fittings and fasteners
  8. Nuclear reactor components

Heat Treatment

ConditionTensileYield 0.2% offsetElongation (%in 2")Reduction of AreaBrinell HardnessRockwell Hardness
Ann363 BhnC33
H900190,000 psi170,000 psi6%15%388 BhnC40
H1025155,000 psi145,000 psi8%27%331 BhnC35
H1075145,000 psi125,000 psi9%28%311 BhnC32
H1150135,000 psi105,000 psi11%30%277 BhnC28
H1150-M115,000 psi75,000 psi14%35%255 BhnC25