3003 aluminum coil is an Al-Mn alloy, which is widely used as a kind of rustproof aluminum. 3003 cannot be strengthened by heat treatment, so it adopts cold processing method to improve its mechanical properties. 3003 aluminum has high plasticity in annealing state, good plasticity in semi-cold hardening, low plasticity in cold hardening, good corrosion resistance, good weldability, poor machinability.