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Contact SupplierWe are offering square hollow section tubes. Square steel tube (sometimes to be called square steel pipe or square hollow section) is a kind of steel hollow section, square or rectangular type. It is made of steel strips, steel plates or round steel pipe by cold-forming, hot-forming/hot-finished production technology. It can be divided into 2 types: seamless square steel tube and welded square steel tube. Nowadays more and more customers prefer to square & rectangular steel tube when it comes to large steel construction, shipbuilding, machinery, railways, electric power industry etc.
1) dimensions: 30*30mm-400*600mm, thickness: 2-25mm, length: