ISO 9328-4-1991 压力用途的钢板和钢带 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