hot rolled steel I beam M4*3.2 1.Size:4*2.25*0.13*0.092in 2.Yield strength beyond 420MPa 3.Used for trailer crossmember Hot rolled steel I beam M4×3.21.Size:4'×2.25'×0.13'×0.092'2.Yield strength beyond 420MPa3.Used for trailer crossmember4.Size:M100×4.8 108×57×3.3×2.3mm Hot rolled steel I beam for trailer crossmember is mainly used for the crossbeam of car,trailer,semi-trailer and so on. which ...