3004 aluminum alloy is an alloy in the wrought aluminum-manganese family (3000 or 3xxx series).
It is similar to the 3003 alloys, except for the addition of approximately 1% magnesium. It can be cold worked (but not, unlike some other types of aluminum alloys, heat-treated) to produce tempers with higher strength, but a lower ductility.
Like most other aluminum-manganese alloys, 3004 is a general-purpose alloy with moderate strength, good workability, and good corrosion resistance.
It is commonly rolled and extruded (used in the making of beverage cans), but typically not forged. As a wrought alloy, it is not used in casting.