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, DIN, EN, GB, AISIGrade ... :hbxsd_selina GB standard Hot Rolled steel I beam Q235/A36/ST37-2/SS400