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Carbon steel square tube

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Steel Pipe

Square Tube

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Square rectangular tube is a general term for square and rectangular cold-formed hollow steel sections, which are formed by strip steel being unpacked, flattened, coiled, and welded into circular tubes and then rolled into shape. The code is divided into F (square tube) and J (rectangular tube). The deviation range of its wall thickness is divided into ± 10% or ± 8% according to the thickness, and the delivery length is usually 4-12 meters. Short pipes of more than 2 meters are allowed to be delivered, and the curvature does not exceed 2 millimeters per meter.
According to the production process, seamless square tubes can be divided into hot-rolled, cold drawn, extruded, and welded square tubes (including arc welding, resistance welding, and other processes). The materials are mainly plain carbon steel (such as Q235, 20 # steel) and low-alloy steel (such as Q345, 16Mn). The cross-sectional types include simple types (square, rectangular) and complex types (corrugated, irregular), and the surface can be treated with galvanizing, oil coating, etc. The product is widely used in fields such as construction, machinery manufacturing, automotive industry, agricultural greenhouses, and steel structures, with specific scenarios involving curtain wall decoration, guardrails, container frames, etc.

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