Bronze anodized aluminum sheet metal for lamps is of alloys 1060, 1070, 1100, 3003, 5005, 5052 etc. Which alloy you should choose is up to the grade and quality of the lamps you need. Generally 1060, 1070 and 1100 alloys are enough for a lamp cover or ornament to last for years, but they are weaker in hardness. Even though …