Metal on the rack, ready to cut

Mild Steel (A36 / 1008): Strong, weldable, low cost. The default for brackets and plates.

Stainless Steel 304: Corrosion resistant. Food, marine, and outdoor parts.

Aluminum 5052: Light, bendable, and rust free.

Galvanized Steel: Zinc coated steel for outdoor and ductwork parts.

Brass 260: Gold tone, decorative, easy to polish.

Copper 110: Best electrical and heat conductor. Bus bars and art.