S31254 F44 1.4547 254SMo two-phase stainless steel overview:
High molybdenum content and high chromium and nitrogen content make the 254SMO have excellent resistance to spot corrosion and crevice corrosion.The addition of copper improves corrosion resistance in some acids.In addition, due to its high nickel content and high chromium and molybdenum content, the 254SMO has good stress corrosion cracking resistance.Numerous field tests and extensive use have shown that, even at slightly higher temperatures, the 254SMO is highly crevices resistant in seawater, and only a few types of stainless steels have this property.

The corrosion resistance of the 254SMO in acidic solutions and oxidized halide solutions required for bleaching processes such as paper is comparable to that of the most corrosion-resistant nickel-based and titanium alloys.Due to its high nitrogen content, the mechanical strength of the 254SMO is higher than that of other types of austenitic stainless steels.In addition, the 254SMO has high ductility and impact strength as well as good weldability.The high molybdenum content of the 254SMO allows it to have a higher oxidation rate when annealed, thus having a rougher surface than ordinary stainless steel after pickling.But this has no adverse effect on the corrosion resistance of the steel.

S31254 F44 1.4547 254SMo Chemical composition of stainless steel