Patent ID: 6033497
Filing Date: 2000-03-07
Classification: C21D,C22C

Abstract:
A highly pitting resistance ferritic-austenitic duplex cast stainless steel alloy which has been treated in a mold by an accelerated heat treatment such that harmful tensile residual stresses are controlled while retaining excellent machinability, ductility and corrosion resistance and essentially consists of, in weight percentage, C: 0.10% and below; Si: 1.5% and below; Mn: 2.0% and below; Cr: 25.0% to 27.0%; Ni: 5.0% to 7.5%; Cu: 1.5% to 3.5%; N: 0.15% and below; Mo: 0.5% and below; and the remaining portion Fe and unavoidable impurities.