Square tube is a kind of light thin-walled steel tube with hollow square section.

Folding is a variety of broken lines formed by the appearance of square tubes, and this defect often runs through the longitudinal direction of the whole product. The reason for folding is that the fake and inferior manufacturers pursue efficiency, and the reduction is too large to produce ears. The folding will occur during the next rolling. The folded products will crack after bending, and the strength of steel will drop greatly. Pitted surface is the defect of irregular uneven surface of steel caused by serious wear of rolling groove. Because of hypocrisy Square tube manufacturer In pursuit of profit, it often appears that groove rolling exceeds the standard. Fake and inferior square tubes are easy to scratch, because the equipment of the manufacturer of fake and inferior square tubes is rough, which is easy to produce burrs and scratch the steel surface. Deep scratches reduce the strength of steel.   

Square tube is a kind of light thin-walled steel tube with hollow square section, also known as steel cold-formed section. It is a shape steel with square section and overall dimension made of Q235 hot-rolled or cold-rolled strip steel or coiled plate as the base material through cold bending processing and high-frequency welding. Hot rolled extra thick wall square tubes, except for wall thickening, have corner dimensions and edge straightness that reach or exceed those of resistance welded cold formed square tubes  

The square tube is used for building, machinery manufacturing, steel construction projects, shipbuilding, solar power generation supports, steel construction projects, power engineering, power plants, agricultural and chemical machinery, glass curtain walls, automobile chassis, airports, etc. God Proud Seamless square tube It is made by extruding seamless round tubes. Plasticity refers to the ability of metal materials to produce plastic deformation (permanent deformation) without destruction under the action of load.

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