Small category of stainless steel characterized by the use of heat treatment for hardening and strengthening. Martensitic stainless steels are plain chromium steels with no significant nickel content. They are utilized in equipment for the chemical and oil industries and in surgical instruments. The most popular martensitic stainless steel is type ... Found on https://steelforge.com/literature/steelog-the-5000-word-metals-glossary/
Martenistic stainless steel is made when austenitic stainless is cooled rapidly enough that the high carbon concentrations are not able to diffuse out of the material on an atomic level. Basically, martenistic stainless has more carbon atoms. It's harder and more ductile than austenitic stainless. Found on https://www.jtcmetals.com/blog/metal-glossary/
A small category of magnetic stainless steels typically containing 12% chromium, a moderate level of carbon, and a very low level of nickel. Found on https://www.ssina.com/education/glossary/