I beam / I-beam / I beeam steel 1.Material : SS 400, ST37-2 , A36, S235 JRG1, Q235, Q345 etc. 2.Length : 6 meter, ... 9 meter GB standard Hot Rolled steel I beam Q235/A36/ST37-2/SS400 Length : 6 meter, 9 meter, ... 12meterMaterial : SS 400, ST37-2 , A36, S235,Q235, Q345 etcStandard: BS, JIS, ASTM, ... .,LTDSKYPE:hbxsd_selina GB standard Hot Rolled steel I beam Q235/A36/ST37 ...