3003 aluminum foil ;is a common product of Al-Mn series alloys. Because of the addition of alloy Mn element, it has excellent rust resistance, weldability, and corrosion resistance. Similarly, 3003 aluminum foil is also a non-heat treated alloy, so the cold working method is used to improve its mechanical properties, but 3003 aluminum foil with medium strength is 10% stronger than 1 series alloy aluminum foil.http://www.htmmaluminum.com/3003-aluminum-foil/