It is a kind of high-strength duralumin, which can be strengthened by heat treatment. It has medium plasticity in annealing, hard quenching and hot state, and good spot welding. When gas welding and argon arc welding are used, the aluminum tube tends to form intergranular cracks; The machinability of aluminum tube is good after quenching and cold work hardening, but it is not good in the annealing state.

Aluminum tube is a kind of nonferrous metal tube, which refers to the metal tubular material extruded from pure aluminum or aluminum alloy to be hollow along its longitudinal full length. There can be one or more closed through holes with uniform wall thickness and cross section, which are delivered in straight line or roll form. It is widely used in automobile, ship, aerospace, aviation, electrical appliances, agriculture, electromechanical, household and other industries.