... ,Q235B,50Q,55Q Weight:8.42kg/m Length:6m,8m,9m,10m,12m,etc Products with the features of high level ... , 30kg/m material: Q235,Q235B,50Q,55Q Length:6m,8m,9m,10m,12m,etc2.Heavy rail size: 38kg/m, 43kg/m ... material: 45Mn,50Mn,U71Mn,U71,U75V,U75VM,PG4 Length:12m,12.5m,25m,etc3.Crane rail size: QU70, QU80 ... , QU100, QV120 material: U71Mn Length:12m,12.5m,etc4.Japan korea standard rail Size: 37A ...