Aluminum tube is a kind of non-ferrous metal tube, which refers to a metal tubular material that is hollow along its 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, aerospace, aviation, electrical appliances, agriculture, electromechanical, home furnishing and other industries.  Aluminum tubes tend to form intergranular cracks when gas welding and argon arc welding are used; aluminum tubes The machinability is still good after quenching and cold work hardening, but it is not good in the annealed state. The corrosion resistance is not high, and anodic oxidation treatment and painting methods are often used to improve the corrosion resistance. It can also be used as a mold material.