1>Hot Roll I-Beam ,IPN 2>Grade SS400 or Q235B 3>Size : 100x68mm---630x180mm Hot Roll I--Beam---Usage(1) building , bridge ,high way (2). Some kinds of machines(4) Carbon structure steel fit for : Standard GB/T706-2008 ,GB/T700-2006,GB/T11263-1998-Grade:Q235B Equal toJIS-SS400 / ASTM-A283M-Gr.DChemical Composition---C-0.12-0.20, Si≤0.30, Mn0.30-0.70,S≤0.045 , P≤0.045,Cr≤0.30,Ni≤0.30,Cu≤0. ...