What is the best material for an outdoor enclosure?

It depends: If weight is a problem or for pole mounting, we use powder-coated aluminum with welded construction. If corrosion is a problem, such as near the ocean, we use powder-coated aluminum or passivated stainless steel with welded construction. For general applications indoors or outdoors, we use powder-coated galvanealed steel with riveted or bolted construction.