1, square tube product description

　　Square tube is a hollow rectangular section of light thin-walled steel tube, also known as steel cold bending section. It is Q235 hot-rolled or cold-rolled strip or coil as the base material after cold bending forming and high-frequency welding made of square section shape and size of the steel. Except for the thickening of wall thickness, the angular dimension and edge straightness of hot-rolled ultra-thick square pipe can reach or even exceed the level of resistance welding cold-formed square pipe. Good comprehensive mechanical properties, weldability, cold, hot working performance and corrosion resistance, with good low temperature toughness.

　　2. Square pipe usage

　　Square pipes are used in construction, machinery manufacturing, steel construction and other projects, shipbuilding, solar power generation support, steel structure engineering, power engineering, power plants, agricultural and chemical machinery, glass curtain wall, car chassis, airport, boiler construction, highway railings, housing construction, pressure vessels, oil tanks, bridges, power stations. Preparation, lifting and transportation machinery and other high load welded structures.