What Is Square Tube Used For?

Square tube is an indispensable way of using steel, usually mainly used in steel structure, structural curtain wall, machinery manufacturing, building materials, shipbuilding airport, liquid transportation, etc. The square tube is divided into seamless and welded joints after having no gaps. The seamless square tube is formed by extruding a round tube without a seam and can be used for liquid transmission. Seamed square tubes can usually be welded by steel plates and are usually used in steel structures, etc. Plasticity refers to the ability of metal materials to slow down the plastic deformation (permanent deformation) of metal forms without damage under load. Hardness is the ability to combine the hardness and softness of metal materials. Too much steel is brittle, and too soft has no plasticity. In the current square tube testing, the most commonly used method is the indentation hardness test method, which measures the degree of indentation by squeezing the square tube. Now for steel structure engineering, the corner size, edge angle and flatness of cold-rolled square tubes have reached or even exceeded the level of welded square tubes.

The square tube is a light-weight thin-walled steel tube with a square cross-section, also known as steel refrigeration curved profiles. Now the most common material is Q235, of which Q235 is divided into BCD and other grades. The seamed square tube is based on Q235 hot-rolled or cold-rolled strip or coil, and then formed by high-frequency welding. This method is only applicable to ordinary The required square tube usually has better performance and stronger airtightness. We usually use seamless round tubes, which are formed by cold rolling. Compared with cold rolling, there are also hot-rolled square tubes. Known for thickening, its hardness value is measured according to the degree of hardness detection. Commonly used methods are Brinell hardness (HB), Rockwell hardness (HRA, HRB, HRC) and Vickers hardness (HV). As we all know, metals have a fatigue property. For example, if we repeatedly bend a piece of iron wire, the iron wire will break. Square tubes have this characteristic. The strength, plasticity and hardness discussed above refer to the mechanical properties of metals under static loads. index. In fact, the support of solar power generation, steel structure engineering, and many machine parts work under cyclical loads. After it has been used for a certain period of time, it will be tested, and in this case, the parts will fatigue. Therefore, regular safety checks are still required. In short, the different uses of the square tube determine the material of the square tube, and the material of the square tube also creates many different physical and chemical properties of them. Therefore, it is better to consult a professional in detail before using it.