구조용강재의 기계적 성질에 관한 통계적 연구

In this study, we have Quantitatively estimated the mechanical properties of SM steels widely used in steel structures after correcting and analyzing the mill sheets of the steels. From this result, in present, the mechanical properties of the steels produced in domestics have satisfied the prescribed values in Korean Standards on the whole. The mechanical properties of the steels were dependent of plate thickness and class of the steels. Also, there have been linear relations between the plate thickness and the mechanical properties of the steels. And the results of this study have shown the similar tendencies with the existing results. Because the upper limit value of yield strength are not prescribed in Korean Standards at present, it is necessary to prescribe the upper limit value of yielding ratio(or yield strength) in order to assure the deformation performance of the steels.