3003 is AL-Mn alloy, the most widely used kind of anti-rust aluminum, the strength of this alloy is not high (slightly higher than industrial pure aluminum), and can not be strengthened by heat treatment, so the use of cold processing method to improve its mechanical properties: In the annealing state has high plasticity, in the semi-cold hardening plasticity is good, cold hardening plasticity is low, good corrosion resistance, good weldability, poor machinability.
