B280 鋼材 440DP
9310H H93100 E9310H H93106 94B15H H94151 94B17H H94171 9430H H94301 3310RH 4027RH 4118RH 4120RH 4130RH 4140RH 4145RH 4161RH 4320RH 4620RH 4820RH 5130RH 5140RH 5160RH 8620RH 8622RH 8720RH 8822RH 9310RH 15B21RH 50B40RH
易切削結(jié)構(gòu)鋼 1117 G11170 1118 G11180 1126 G11260 1132 G11320 1137 G11370 1138 G11380 1140 G11400 1141 G11410 1144 G11440 1146 G11460 1151 G11510 1212 G12120 1213 G12130 12L14 G12144 1215 G12150 6250H