CR-NI NONMAGNETIC STAINLESS STEEL FOR SUPERLOW TEMPERATURE SERVICE HAVING HIGH STRENGTH AND HIGH TOUGHNESS

摘要

PURPOSE:To improve strength, toughness and corrosion resistance at superlow temp. by limiting the amounts of components C, Si, Mn, Ni, Cr and N so that Ni equivalent represented by the weigthted sum of the components comes to a prescribed value or above. CONSTITUTION:The titled stainless steel consists of =0.08% C, =2% Si, 3-15% Mn, 12-16% Ni, 16-25% Cr, 0.2-0.5% N, and the balance Fe and satisfies (Ni equiv.)=29.5. The above ni equiv. is represented by Ni+0.65Cr+0.46Mn+0.35 Si+12.6C+11.8N.