TWO-PHASE STAINLESS STEEL EXHIBITING EXCELLENT CORROSION RESISTANCE IN WELD

摘要

A nitrogen-rich two-phase stainless steel that has corrosion resistance equal to that of general-purpose two-phase stainless steel and is not susceptible to corrosion in a welding heat-affected part, wherein the austenite phase area ratio is 40-70%, the PI value expressed by formula (1) is 30-38, the NI value expressed by formula (2) is 100-140, and the ?pre expressed by formula (3) is 1350-1450. (1) PI=Cr+3. 3Mo+16N (2) NI=(Cr+Mo)/N (3)?pre=15Cr28Si12Mo+19Ni+4Mn+19Cu+77ON+1160C+1475