Aluminum tube is a kind of high-strength hard aluminum. which can bestrengthened by heat treatment. it has moderate plasticity under annealing, freshquenching and hot conditions. lt has good spot welding weldability. The aluminum tube has a tendency to form intergranular cracks when gas weldingand argon arc welding are used: The machinability of the aluminum tube afterquenching and cold work hardening is still good, but it is not good in theannealed state. The corrosion resistance is not high, and anodizing treatmentand painting methods are often used, or the surface is coated with aluminumlaver to improve the corrosion resistance. lt can also be used as a mold material