With the development of society, stainless steel products have been derived from many kinds. Different kinds have different properties, and different properties of stainless steel products are used in different fields. Saving duplex stainless steel is a new type of stainless steel. In conventional duplex stainless steel, 50% austenite and 50% ferrite are obtained by balancing the alloying element ratios. This stainless steel has excellent corrosion resistance and mechanical properties. With the rise of raw material prices, in recent years the saving duplex stainless steel has been a good development. This stainless steel has higher yield and tensile strength than conventional duplex stainless steel.

Despite these advantages, the corrosion resistance and impact fracture toughness are weakened. So, how is the saving type of duplex stainless steel corrosion? After the research of scientists, it is found that the two kinds of stainless steel 2101, 2304 as an example, in the range of 550 degrees Celsius to 850 degrees Celsius, 2101 and 2304 show ductile behavior, but their respectively is 2101 under other conditions will occur brittle fracture, and 2304 has been showing ductile behavior. After research, scientists concluded that 2304 is more conducive to the formation of secondary austenite.