... beams for sale steel grade:Q235,Q345,SS400 standard:JIS,GB/T11263-1998 size:100*100-900*300 length:6 or 12m h beams for ... 12m5.applicationused for machinery, procesing, structure building, automobile manufacturing, shipbuilding, electric powerhot sale size ... , 450*200, 496*199, 500*200mmH BEAMS GradeCHEMICAL COMPOSITION %MECHANIC PROPERTYCSiMnPSBYield Strength (N/mm ... -GB standard weight h beams for sale