5A02 aluminum plate is an AL-Mg system alloy, is the most widely used an aluminum alloy, this alloy has high strength, especially fatigue strength: plasticity and corrosion resistance is high, can not be heat treated to strengthen, plasticity is still good when semi-cold work hardening, plasticity is low when cold work hardening, good corrosion resistance, good weldability, poor machinability, can be polished. Uses are mainly used for the requirements of high plasticity and good weldability, low load parts working in liquid or gas medium, such as oil tanks, gasoline or lubricating oil conduits, various liquid containers and other small load parts made by deep drawing.