3 series of products

Features: aluminum alloy with manganese as the main alloying element, non-heat treatment strengthening, good corrosion resistance and good welding performance. Good plasticity. (close to super aluminum alloy). Disadvantages: low strength, but can be strengthened by cold work hardening. Coarse grains are easily generated during annealing. Application scope: Seamless oil pipe (3003 alloy) and pop can (3004 alloy) used on aircraft.