Shaped square tube is a hollow square section steel pipe, also known as steel cold-formed profiles. Shaped square tube is hot-rolled or cold-rolled strip or coil is made of square cross-section shape and size of the blank by cold bending forming and then by high-frequency welding steel. Hot-rolled special thick-walled square tube in addition to thickening of the wall thickness of the outer case, the corner sizing and edge flatness to meet or exceed the level of resistance welding cold forming square tube. Shaped square tube use: the use of shaped square tube construction, machinery manufacturing, steel construction projects, shipbuilding, solar power bracket, steel structure engineering, electrical engineering, power plants, agricultural and chemical machinery, glass curtain wall, car chassis, airports and so on. Shaped square tube seamless and weld the points shaped square tube is extruded strip made. Plastic plastic under load refers to the metal, plastic deformation (permanent deformation) without disrupting the ability. Hardness Hardness is a measure of the hardness of the metal material pointer. Production of determination of the hardness of the most commonly used method is the indentation hardness method, it is with a certain geometric shape of the indenter under a certain load pressed into the surface of a metallic material to be tested, according to the degree of being pressed into the measured hardness value. Commonly used methods Brinell hardness (HB), Rockwell hardness (HRA, HRB, HRC) and Vickers hardness (HV). Discussed in front of the fatigue strength, ductility, hardness are the mechanical properties of metals under static loads pointer. In fact, many machine parts are in working under cyclic loading, Part under such conditions will produce fatigue. Impact toughness was called a lot of speed effect on the mechanical load impact load, metal ability to resist damage under impact loading is called impact toughness. Shaped square tube Specification Name Specification Name Specification shaped square tube 110 * 110 * 5.0-10.0 shaped square tube 60 * 90 * 4.0-8.0 shaped square tube 125 * 125 * 6.0-12.0 shaped square tube 80 * 220 * 5.0-10.0 shaped square 145 * 145 * 6.0-10.0 shaped tube 135 * 135 * 6.0-12.0 shaped square tube 80 * 230 * 5.0-10.0 shaped square tube square tube 80 * 240 * 6.0-10.0 shaped square tube 172 * 172 * 8.0-12.0 shaped square 120 * 200 * 5.0-12.0 shaped square tube 90 * 150 * 8.0-12.0 shaped square tube 175 * 175 * 5.0-10.0 shaped square tube 100 * 180 * 5.0-10.0 shaped square tube 220 * 220 * 8.0-16.0 shaped square tube tube 230 * 230 * 5.0-10.0 shaped square tube 150 * 350 * 6.0-14.0 shaped square tube 240 * 240 * 6.0-12.0 shaped square tube 260 * 300 * 8.0-12.0 shaped square tube 260 * 260 * 8.0-12.0 shaped square pipe 160 * 220 * 6.0-12.0 shaped square tube 280 * 280 * 8.0-12.0 shaped square tube 160 * 230 * 8.0-12.0 shaped square tube 360 ??* 360 * 8.0-12.0 shaped square tube 450 * 250 * 8.0-16.0 welcome new and old customers call to discuss, Yan Thai staff dedicated to provide you with the Gold Rectangular Pipe products!