Mo in CA6NM martensitic stainless steel

Mo——the addition of alloying element Mo in martensitic stainless steel is beneficial to the strength. And also to toughness and corrosion resistance. Mo is a ferrite forming element. It can reduce the Ms temperature. The addition of Mo in super martensitic steel can reduce the martensite unidirectional zone. Meanwhile, Mo can promote the passivation of Cr in some reducing corrosive media. Thus, Mo can improve the corrosion resistance of Cr-Ni stainless steel in reducing acid. And inhibit the pitting corrosion of Cl- and improve the intergranular corrosion resistance of steel.