Square steel tube OD: 10 x 10mm - 500 x 500mm WT: 1 - ... materials: Q195, Q215, Q235, St37-2, SS330, SS400, ASTM 1010, ASTM 1017, ASTM 1020Application: in construction structure, machinery, container, furniture structure, electromechanical ... airport structure, plaza structure, sports apparatus and automotive partsPacking: export standard package anti-press anti-corrode inbulk; oil or bundle or ...