3003 aluminum discs are the most popular in application among 3xxx aluminum circles. Other alloys include 3004, 3005, 3104 and 3105 etc. In comparison with 1000 series aluminum circles (1050, 1060, 1070, 1100), 3000 discs have harder strength and better corrosion resistance. A 3003 disc contains a slight amount of magnesium featured in light weight and excellent anti-rust property. In …