Steel rails of various STD Grade: Q345, 55Q, 50Mn, U71Mn Heavy rail: 38Kg-50Kg STEEL RAILSSTD: ARME, UIC, BS, ISCOR, AS, JIS, ISCRHEAVY RAIL ACC TO GB2585-2007SIZEDIMENSION (mm)WEIGHTABCtKg/mGB 38KG681341141338.733GB 43KG7014011414.544.653GB 50KG 7015213215.551.514