Martensitic stainless steel: This type of stainless steel is in the γ-phase region at normal quenching temperature, but their γ-phase is only stable at high temperature, and the M point is generally around 300 °C, so it transforms into martensite when cooled.
This type of stainless steel includes 2Cr13, 2Cr13Ni2, 3Cr13 and some modified 12% chromium hot-strength steels, such as 13Cr14NiWVBA, Cr11Ni2MoWVB steel, etc. The mechanical properties, corrosion resistance, technological properties and physical properties of martensitic stainless steel are similar to those of ferritic-martensitic stainless steel containing 12-14% chromium.
Since there is no free ferrite in the structure, the mechanical properties are higher than those of the above stainless steels, but the overheating sensitivity during heat treatment is lower.
