1.Welded H-beam / Steel Constructions 2.Grade:Q235B-Q420 SS400-SS540,A36--A572 3.Size:150*150mm---1200*2000mm Welded H-beam---Usage(1) building , bridge ,high way (2). Some kinds of machinesGrade: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≤0.30Mechanical&Technalical :Y.S.(MPa)≥235 , T.S.(MPa) 375—500 , EL≥23 ...