Definitions for "Martensitic"
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 410 (a grade appropriate for non-severe corrosion environments requiring high strength).
A stainless steel (400 series) which transforms on cooling from austenite to martensite and remains martensitic at room temperature.
Steels capable of being brought to a very hard condition are called martensitic steels. This type is best suited for knife blades. See Heat-Treating for more explanation.