Precipitation Hardened (PH) Stainless Steels - 17-4PH, 17-7PH, and PH 15-7Mo

PH stainless steel is made by adding copper, molybdenum, aluminium, and titanium (by themselves or in any combination).

These stainless steels can be three or four times stronger than austenitic steel and has a relatively low toughness.

Depending on chemical composition their microstructure after final heat treatment is austenitic, semi-austenitic or martensitic.

Age Hardening
This process hardens steel by heating it in order to form precipitates which prevent the movement of defects

in the steel's molecular structure. The containment of these defects makes the metal harder and stronger.

After heating, it is then stored for hours at an elevated temperature until the process is complete.

This process is often used to increase the strength of martensitic steel.

Typical applications for precipitation hardening stainless grades:

• retaining rings, spring holders, springs
• aircraft parts
• flat springs, bellville washers

We supply PH grades

followed by ASTM A693 plate, sheet and strip

Products supply in forms of

cold rolled steel coil, strip, and sheet