Detailed Product Description square hollow sections Size: 80x80mm-500x500mm Thickness: 4mm-20mm depends on size Standard: EN10219,EN10210,ASTMA500 Steel grade: S235JR-S355J2H Capability: 10, 000tons/year Use: construction structure, machinery, container , hall structure, solar stent, offshore oil field, sea trestle , motorcar cassis, airport structure, shipbuilding, automotive parts and so on. ...