Aluminium circles grade 1100 is an ordinary industrial pure aluminum with 99.0% aluminum content. 1100 can not be strengthened by heat treatment, thus it has a very low strength. But as a cheap aluminium alloy, 1100 circles displays good ductility, formability, weldability and corrosion resistance. After anodic oxidation, it takes on a smooth bright surface with strengthened corrosion resistance. 1100 …