Striking a good balance of corrosion resistance and strength, these 6000-series aluminum alloys are also heat treatable, machinable, and weldable. They’re widely used for vehicle parts, door frames, and rail-framing systems.

1000-, 3000-, and 5000-series aluminum alloys stand up to salt water, chemicals, and weather better than other types of aluminum. They're also the easiest to form and weld, so they're often made into storage tanks, architectural trim, awnings, and fan blades.