1, bend 100 60 square pipe. If the pipe wall is too thin, you can put sand in the pipe and bend it again. Bend by hand, preferably with a bending die.
2. Square tube It is a square section steel with Q235 hot-rolled or cold-rolled strip or coil as the base material, which is made after cold bending and high-frequency welding.
3. The corner size and edge straightness of hot-rolled ultra-thick-walled square tube reach or even exceed the level of resistance welding cold-formed square tube, but the wall thickness is thickened. Good comprehensive mechanical properties, weldability, cold and hot workability and corrosion resistance, and good low temperature toughness.