Steel I beam Size:100*100-900*300mm Grade:Q235,Q345,S235JR,S275JR,S355JR Standard:ASTM,JIS G3101,EN10025 Steel I BeamSize: from 100 x 100 to 900 x 300 Steel Grade: Q235B, Q345B, SS400, ASTM A36, S235JRG2, S235JR, S275JRStandard: GB700-1998, JIS G3101, ASTM, EN10025 Steel I beam