Copper
ie Tubing, wires, roofing copper.
Aluminum
ie Extrusions, structural, cutoffs, bumpers, rims, air conditioner coils, tanks.
Stainless Steel
Separated by different grades depending on type of stainless.
Brass
ie Bare, pipes, heater cores.
Alloys
ie Nickel, Cobalt, Titanium, Tungsten, etc.
Others
ie Electric motors, radiators, compressors, clean turnings.