Aluminum tube refers to a metal tubular material that is hollow along its entire longitudinal length through extrusion processing of pure aluminum or aluminum alloy. There can be one or more closed through holes, the wall thickness and cross-section are uniform, and they are delivered in straight lines or in rolls. Widely used in automobiles, ships, aviation, electrical appliances, agriculture, electromechanical, home furnishing and other industries. Aluminum tubes are divided according to shape: square tube, round tube, patterned tube, special-shaped tube; according to extrusion method: seamless aluminum tube and ordinary extruded tube