... 4.Size: 38kg/m, 43kg/m, 50kg/m Light rail,Heavy steel rail,Crane rail Specifications 1Standard:GB11264-89, YB222-63, GB2585-20072Size:6kg ... /m, 43kg/m, 50kg/m, 60kg/mMaterial: U71Mn 50Mn3. CraneSize: QU70, QU80, QU100, QU120Material: U71MnDimension,thickness,length,zinc coating,material, and ...