When the Super Duplex Flanges is at room temperature, it features a two-phase ferritic-austenitic stainless steel microstructure. Duplex is a Fe-Ni-Cr alloy.There is a benefit to combining ferritic and austenitic grades.   It indicates that the final metal has a better metallurgical structure. It has two phases that combine the advantages of the two microstructures. IS 2062 Grade...