FERRITIC STAINLESS STEEL PLATE PRODUCING NO STRETCHER STRAIN

摘要

PURPOSE:To obtain the titled low-cost steel plate producing no stretcher strain even in a multi-step drawing stage by providing a specified composition consisting of C, Si, Mn, Cr, N, Fe and inevitable impurities and having specified relation. CONSTITUTION:A ferritic stainless steel plate producing no stretcher strain is obtd. by providing a composition consisting of, by weight, =0.08% C, =0.70% Si, =1.00% Mn, 15-20% Cr, 0.04-0.12% N (C+N=0.08-0.15%) and the balance Fe with inevitable impurities. 0.08% C deteriorates the corrosion resistance and toughness and hardens the material. 0.70% Si hardens the material and reduces the elongtion. 1.00% Mn hardens the material. 15% Cr does not give the desired corrosion resistance, and 20% Cr makes looping remarkable. N and C+N prevent the production of a stretcher strain in said ranges, yet more than the uppr limits of N and C+N harden the material.