Heavy Steel Rail 1.Standard:GB 2585-2007 2.Grade:U71Mn 45Mn 3.Type:38-45kg/m 4.Length:12.5m 25m 50m 100m Heavy Steel Rail (GB 2585-2007) Typekg/mSection SizemmTheoretical Weightkg/mLengthmHeightBottom WidthHead WidthWeb Thickness381341146813.038.85812.5, 25, 50, 100431401147014.544.745501521327015.551.653601761507316.560.798751921507520.074.604 Heavy steel rail is the main component of railroad ...