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.

Also known as mild steel, low-carbon steel is easy to machine, form, and weld. It's widely fabricated into parts that don’t require high strength.

This opaque and semi-clear plastic is often used in place of metal where a lightweight material is desired, such as for signs, equipment housings, and gears.

The open top allows U-channels to slide over an edge. Use them as seals and trim.