KS D ISO 9328-4-2003 压力容器用钢板和带材.交货技术条件.第4部分:正火、淬火和回火状态提供的具有高屈服应力的可焊细晶粒钢
Steel plates and strips for pressure purposes-Technical delivery conditions-Part 4:Weldable fine grain steels with high proof stress supplied in the normalized or quenched and tempered condition