易切削结构钢: 15S10 1.0710 10S20 1.0721 15S20 15S22 1.0723 35S20 1.0726 45S20 46S20 1.0727 60S20 60S22 1.0728 10SPb20 1.0722 35SPb 1.0756 45SPb20 46SPb20 1.0757 60SPb20 60SPb22 1.0758 9***n28 11***n30 1.0736 9***n36 11***n37 1.0736 9***nPb28 11***nPb30 1.0718 9***nPb36 11***nPb37 1.0737 9S20 11***n28 11***nPb28 12***nPb35 12***n35 10Pb20 10SPb20 17***n2035S20 35***n20 44***N28 46S20…….