... 300 4.length:6 or 9 or 12m h beamhot rolled h beamh beam 1.standardJIS standard, GB/T11263 ... please check as below:100*100, 125*125, 150*75, 150*150, 148*100, 198*99, 200*100, 248*124 ... 446*199, 450*200, 496*199, 500*200mm H BEAMS GradeCHEMICAL COMPOSITION %MECHANIC PROPERTYCSiMnPSBYield Strength (N/mm)Tensile ... 0.490.022~0.0260.021~0.0280.000827541533.5OKRemark H-waist height ; B-leg breadth ; T1-waist ...