Practical Guidelines for the Fabrication of Duplex Stainless Steels

Duplex stainless steels are a family of grades combining good corrosion resistance with high strength and ease of fabrication. Their physical properties  are between those of the austenitic and ferritic stainless steels but tend to be closer to those of the ferritics and to carbon steel. The chloride pitting and  crevice corrosion resistance of the duplex stainless steels are a function of chromium, molybdenum, tungsten, and nitrogen content. They may be similar to those of Type 316 or range above that
of the sea water stainless steels such as the 6% Mo austenitic stainless steels.