Martensitic stainless steel:
It is low carbon or high carbon steel, mainly chromium content is in the range of 12% -18%.

The world wide application of martensitic stainless steel has the following 3 categories:

1. Low-carbon and carbon 13% Cr steel  

2. 18% Cr high-carbon steel

3. Low carbon nickel (about 2%) of 17% Cr steel