High strength, but the ductility and weldability is poor. Common brands of martensitic stainless steel 1Cr13, 3Cr13 and so on, because carbon is higher, therefore has the strength, higher hardness and wear resistance, but the corrosion resistance is a bit poor, used for mechanical performance requirements of high corrosion resistance, some parts of the general requirements, such as spring water, steam turbine blades, compressor valve. This kind of steel is used in the quenching, tempering after. Forging, stamping after annealing.