1mm aluminium sheet has alloys of 1050, 1060, 1070, 1100, 3003 and 5052 etc. Aluminium has 8 series altogether, and each series cover three to a dozen alloys containing different chemical compositions that further lead to variation in mechanical properties. Therefore, not all alu sheets of 1mm thick are the same in either mechanical characteristics or service life. The sheets you buy are mostly of 1050 alloy, the cheapest of all alloys, featured by low hardness and poorer corrosion resistance than most of the other alloys. The production technology of the alloy is quite mature, thus the cost is low. Alloys beginning with 3 is more expensive, and better in strength and corrosion resistance. If you want the hardest, there are 2024 and 7075 available, the hardness of which can compete with mild steel. But their plasticity is not so good. If want the most cost efficient alloy, 5052 or 5083 is recommended. These alloys shows not only relatively good strength but also excellent corrosion resistance against seawater. In a word, you need to figure out what properties you need in the aluminium sheet before purchasing. Just adding 1mm is not enough to help narrow down the scope.
In addition to the alloy, you need to be clear about the surface treatment method you need for the 1mm aluminum sheet. Regular surface methods include mill finish (rolled surface out of the mill, no extra steps), embossing (with patterns like diamond on the surface), polishing (a mirror like surface, with a given reflectivity you need), anodizing (with a hard film on the surface), color coating (pe or pvdf paint adding to beauty and service life) etc. If you are bewildered about the terms above, just tell your supplier what you are going to do with the sheet. They will recommend the best to you.
Haomei supplies 1mm aluminium sheet of all regular alloys and surface treatment methods. The width is 100mm to 2680mm, and the length 500mm to 16000mm. The price varies from specification to specification.