60 KG CLASS HIGH TENSILE CONTROLLING ROLLED STEEL SHEET WITH BRITTLENESS RESISTANCE IN STRESS RELIEF ANNEALING

摘要

PURPOSE:To provide the title steel sheet, SR brittleness of which can be prevented without decreasing the strength and toughness of the base material by adding C, Si, Mn and Nb of each specified atm. range and one or more out of Cu, Ni and Mo of each specified atm. or below as required to Fe.