... I beam 1> Material:SSST37-2,Q235, Q345, SS400 2> Length:6M,9m,12m 3>GB/T19001-2008/ISO9001:2008 4 ... >size:50*25*3/4/5 1> Material : SS 400, ST37-2 ... 9 meter ,12 meter3> Chinese Standard size : 100*68*4.5mm-630*180*17mm4> European Standard size : 80*46*3 ... -Shen Expressway.Our main products include angle steel, channel, I-beam, H-beam, deformed bar and more. Under the ...