2A12 aluminum alloy is a kind of high-strength hard aluminum, which can be heat-treated and strengthened; 2A12 aluminum alloy has good spot weldability, and there is a tendency to form intergranular cracks when using gas welding and argon arc welding; 2A12 aluminum alloy can be cut after cold work hardening Performance is still good. The corrosion resistance is not high, and the anodizing treatment and painting method or the surface is coated with an aluminum layer to improve the corrosion resistanceHigh-strength wrought aluminum has high plasticity in the hot state, easy to forge. Stamping; can be heat-treated and strengthened. The strength after quenching and artificial aging is similar to that of hard aluminum; the process performance is good, but there is a squeezing effect, so the longitudinal and lateral directions The performance is different; the corrosion resistance is good, but there is a tendency of intergranular corrosion; the machinability is good, the resistance welding, the spot welding, the seam welding performance is good, the arc welding and the gas welding performance are not good.