3003 alloy is an aluminum alloy with manganese as the main alloying element. It has good corrosion resistance to atmospheric, fresh water, sea water, food, organic acid, gasoline, neutral inorganic salt aqueous solution, etc., and corrosion resistance in dilute acid. Very good, so there is a reputation of "king of rust".

The chemical composition of the 3003 alloy is: silicon Si: 0.60 iron Fe: 0.70 copper Cu: 0.05-0.20 manganese Mn: 1.0-1.5 zinc Zn: 0.10 Other: single 0.05, total 0.15 aluminum Al: balance.

The strength of 3003 aluminum coil is not high, and the strength is slightly higher than that of industrial pure aluminum. It can not be heat-treated and strengthened. Therefore, cold processing is used to improve its mechanical properties: high plasticity in the annealed state and plasticity in the semi-cold hardening.

It is still good, the plasticity is low during cold work hardening, the corrosion resistance is good, the weldability is good, and the machinability is poor. It is mainly used for processing parts parts that require good formability, high corrosion resistance, and good weldability.

Such as kitchen utensils, food and chemical product processing and storage devices, tanks, tanks for transporting liquid products, various pressure vessels and pipes processed with thin sheets.