How many types of stainless steel are there? by yaang.com

Stainless steel is usually divided into 5 types:

1. Precipitation hardening (PH) Stainless Steels - These stainless steels can develop very high strength by adding elements such as Copper, Niobium and Aluminium to the stainless steel. With a suitable “aging” heat treatment, very fine particles form in the matrix of the stainless steel which imparts strength.