15-5 PH Stainless Steel Data Sheet

GENERAL PROPERTIES

Alloy 15-5 is a precipitation hardening alloy exhibiting high strength and hardness with moderate corrosion resistance. Alloy 15-5 is a variant of the older 17-4 and 15-5 was designed to have greater toughness than S17400, especially in the through-thickness (short transverse) direction. Alloy 15-5 is used in applications that require high transverse strength and toughness such as engine parts, aircraft components, nuclear reactor components etc.

RESISTANCE TO CORROSION

The general level of corrosion resistance of 15-5 PH Stainless Steel exceeds that of types 410 and 431, and is approximately equal to that of 17-4 PH. This is indicated by laboratory tests in both strongly oxidizing and reducing media, as well as by atmospheric exposures. In all heat-treated conditions, this alloy exhibits very little rusting after 500 hours of exposure to 5% salt fog at 35°C.

PHYSICAL PROPERTIES

MECHANICAL PROPERTIES

CHEMICAL PROPERTIES

WELDING

Precipitation hardening steels can be readily welded using procedures similar to those used for the 300 series of stainless steels.

HEAT TREATMENT

The key to the properties of precipitation hardening stainless steels lies in heat treatment. After solution treatment or annealing of precipitation hardening stainless steels, a single low temperature “age hardening” stage is employed to achieve the required properties. As this treatment is carried out at a low temperature, no distortion occurs and there is only superficial discolouration. During the hardening process a slight decrease in size takes place. This shrinking is approximately 0.05% for condition H900

and 0.10% for H1150.