... 560mm 3.length:6/9/12m 4.ipe/ipeaa/ipeaaaa i beams weighti beam1.steel gradeQ235,Q345,SS400,SS4902.sizeChinese ... machinery, processing, structure building, automobile manufacturing, shipbuilding, electric powerH&I BEAMS GradeCHEMICAL COMPOSITION %MECHANIC PROPERTYCSiMnPSBYield Strength (N/mm)Tensile Strength ... 5mm40b 400*144*12.5mm40c 400*146*14.5mm45a 450*150*11.5mm45b 450*152*13.5mm45c 450*154*15. ...