The classification of aluminium circles for utensils falls on four categories: alloy, rolling type, surface treatment methods and further process methods. By alloys there are 1050, 1060, 1070, 1100, 3003, 3004, 3005 and 5052. These are regular ones, sometimes special alloys are adopted. Basic differences of these alloys lie in hardness, tensile strength and corrosion resistance. 1xxx series, containing the …