15 – 5 PH® Stainless Steel , UNS S15500, XM-12
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.
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.
|Nb + Ta||0.3|
- 15-5 PH Mechanical Properties
|Condition||Ultimate Tensile Strenght||Yield Strength||Elongation||Reduction of Area||Hardness Brinell||Hardness Rockwell|
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.