3003 Aluminum alloy is an alloy in the wrought Aluminum-manganese family (3000 or 3xxx series). It can be cold worked (but not, unlike some other types of Aluminum alloys, heat-treated) to produce tempers with a higher strength but a lower ductility. Like most other Aluminum-manganese alloys, 3003 is a general-purpose alloy with moderate strength, good workability, and good corrosion resistance. It is commonly rolled and extruded, but typically not forged. As a wrought alloy, it is not used in casting. It is also commonly used in sheet metal applications such as gutters, downspouts, roofing, and siding.
