3003 aluminium alloy strip is an alloy in the wrought aluminium-manganese family (3000 or 3xxx series). It can be cold worked (but not, unlike some other types of aluminium alloys, heat-treated) to produce tempers with a higher strength but a lower ductility. Like most other aluminium-manganese alloys, 3003 aluminum strip 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

3003 aluminum strip and aluminum sheet is approximately 20% stronger than 1100 series aluminum strip . 3003 aluminum  strip reacts well to mechanical finishings as well as organic finishes. 3003 welding is readily accomplished by means of conventional welding methods.