No. 20 160 * 120 * 10 rectangular seamless steel pipe

Calculation formula for weight of rectangular tube: (side length+side length) X2//3.14- wall thickness X wall thickness X0.02466

Seamless square tube is a long steel strip with a hollow cross-section and no seams around the periphery. Steel pipes have a hollow cross-section and are widely used as pipelines for transporting fluids, such as oil, natural gas, coal gas, water, and certain solid materials. Compared with solid steel materials such as round steel, steel pipes are lighter in weight when their bending and torsional strength is the same. They are an economical cross-sectional steel material widely used in the manufacture of structural and mechanical parts, such as oil drill rods, automotive transmission shafts, bicycle frames, and steel scaffolding used in construction. Using steel pipes to manufacture circular parts can improve material utilization, simplify manufacturing processes, save materials and processing time, such as rolling bearing rings, jack sleeves, etc. Currently, steel pipes are widely used for manufacturing. Steel pipes are still an indispensable material for various conventional weapons, such as gun barrels and cannon barrels, which require steel pipes for manufacturing. Steel pipes can be divided into circular pipes and special-shaped pipes according to their cross-sectional area and shape. Due to the fact that the circular area is the largest under the condition of equal circumference, a circular tube can transport more fluid. In addition, when subjected to internal or external radial pressure, the circular cross-section is subjected to more uniform force, therefore, the vast majority of steel pipes are circular. However, circular pipes also have certain limitations. For example, under the condition of planar bending, circular pipes have lower bending strength than square and rectangular pipes. Some agricultural machinery skeletons, steel and wood furniture, etc. commonly use square and rectangular pipes. According to the mechanical properties of different square tubes used