... /55Q 4.Size: 38kg/m, 43kg/m, 50kg/m Light rail,Heavy steel rail,Crane rail Specifications 1Standard:GB11264-89, YB222-63 ... /U71Mn/50Mn5Certificate:ISO, MTC, SGS6Delivery term:5-25 days7Packaging: 1. Light rail:Size: 6kg/m, 8kg/m, 12kg/m, 15kg/m ... , 18kg/m, 22kg/m, 24kg/m, 30kg/mMaterial: Q235B 55Q2. Heavy railSize: 38kg/m, 43kg/m, 50kg/m, 60kg/mMaterial: U71Mn ...