15-5ph Stainless Steel

We are Asia Metal supplier with full range of Stainless Steel sheets, stainless steel round bar , stainless steel rod, stainless steel plate,  300 Series stainless steel , 400 series stainless steel , 253ma, f6nm, sus301, sus303, sus304, sus304l, sus309,  sus310, sus310s, sus316, sus316l, sus316ti, sus317, sus321, sus347, sus403 , sus409, sus410 , sus416, sus420, sus420j2, sus430, sus430f, sus431 , sus440c , sus630 , 904L 17-4PH, s31803 , s32750 , s32760, s31254, s329j4l, Nitronic30, Nitronic50 , Nictronic60, Ferralium 255

World-wide shipping : With over 15 years of experience, we offer Air shipments all over the world.


15 – 5 PH® Stainless Steel , UNS S15500, XM-12

What type of steel is 15-5?

Stainless steel 15-5 PH, also known as UNS S15500 or XM-12, is a modification of 17-4 PH developed in the 60’s. UNS S15500 stainless steel has a more refined microstructure as a result of the remelting process in which it was developed. This refined structure enhances toughness, especially in the transverse direction of the material. 15-5PH also has excellent corrosion resistance, good fabricating characteristics and low temperature hardening which makes Stainless Steel 15.5 PH the preferred alloy for many industries.

The composition of 15/5PH includes small amounts of carbon, manganese, phosphorus, columbium (or niobium), tantalum, silicon and sulfur. 15/5 PH can be forged, welded and formed. Machining may be performed in the solution-annealed state or in the final heat treat condition. Desired mechanical properties such as ductility and strength can be achieved through heating the material at various temperatures.

Is 15 5ph magnetic?

UNS S15500 is a martensitic precipitation hardening grade. Martensitic stainless steels were designed as a type of alloy which is corrosion resistant and could also be hardened through heat treatment.


15-5pg Chemical Composition

Element Content (%)
Iron, Fe 75
Chromium, Cr 14.48
Nickel, Ni 4.5
Copper, Cu 3.5
Manganese, Mn ≤1
Silicon, Si ≤1
Nb + Ta 0.3
Carbon, C ≤0.07
Phosphorous, P ≤0.04
Sulfur, S ≤0.03


 15-5 PH Mechanical Properties

Condition Ultimate Tensile Strenght Yield Strength Elongation Reduction of Area Hardness Brinell Hardness Rockwell
H900 190,000 170,000 6 15 388 C40
H1025 155,000 125,000 8 27 331 C35
H1075 145,000 125,000 9 28 311 C32
H1150 135,000 105,000 11 30 277 C28
H1150-M 115,000 75,000 14 35 255


Industries that use 15.5PH include:

  • Aerospace , Chemical, Food processing, General metal working,  Paper industries,  Petrochemical.

Products partially or completely constructed of 15-5PH include:

  • Aircraft components, Cylinders,  Engine parts, Fittings, Gears, Hallow shafts, Marine gas turbine, compressor sections, Paper mill equipment, Shafts, Valves.