模具用钢板; 用于制作各类塑料模具,高镜面模具,模架等, 主要钢号: p20 s450-s550 40cr 45-55 20mn-50mn sm45-sm55 sm3cr2nimo 2311 2378 718 618b p80 p20 s450-s550 40cr 45-55 20mn-50mn sm45-sm55 sm3cr2nimo 2311 2378 718 618b p80 p20 s450-s550 40cr 45-55 20mn-50mn sm45-sm55 sm3cr2nimo 2311 2378 718 618b p80 p20 s450-s550 40cr 45-55 20mn-50mn sm45-sm55 sm3cr2nimo 2311 2378 718 618b p80 p20 s450-s550 40cr 45-55 20mn-50mn sm45-sm55 sm3cr2nimo 2311 2378 718 618b p80 p20 s450-s550 40cr 45-55 20mn-50mn sm45-sm55 sm3cr2nimo 2311 2378 718 618b p80 p20 s450-s550 40cr 45-55 20mn-50mn sm45-sm55 sm3cr2nimo 2311 2378 718 618b p80 p20 s450-s550 40cr 45-55 20mn-50mn sm45-sm55 sm3cr2nimo 2311 2378 718 618b p80 p20 s450-s550 40cr 45-55 20mn-50mn sm45-sm55 sm3cr2nimo 2311 2378 718 618b p80 p20 s450-s550 40cr 45-55 20mn-50mn sm45-sm55 sm3cr2nimo 2311 2378 718 618b p80 p20 s450-s550 40cr 45-55 20mn-50mn sm45-sm55 sm3cr2nimo 23