Performance characteristics of stainless steel containing molybdenum element

Molybdenum - containing duplex stainless steel has good resistance to chloride stress corrosion under low stress. Generally, 18-8 austenitic stainless steel is prone to stress corrosion fracture in neutral chloride solution above 600C. Heat exchangers, evaporators and other equipment made of this kind of stainless steel in trace chloride and hydrogen sulfide industrial media are prone to stress corrosion fracture, while duplex stainless steel has good resistance. Molybdenum - containing duplex stainless steel has good corrosion resistance. The critical pitting potential of duplex stainless steel is similar to that of austenitic stainless steel when it has the same pitting resistance (PrE=Cr%+3.3×Mo%+16×N%). The corrosion resistance of duplex stainless steel and austenitic stainless steel is comparable to AISI 316L. The pore-corrosion and crevice corrosion resistance of the high chromium duplex stainless steel containing 25%Cr, especially nitrogen, exceeds that of AISI 316L. It has good resistance to corrosion fatigue and wear corrosion. In some corrosive medium conditions, suitable for the production of pumps, valves and other power equipment. Good comprehensive mechanical properties.