Aluminum is used extensively in articles requiring lightness, corrosion resistance, and electrical conductivity. Aluminum Angles offer the advantage of low weight, while providing strong structural support. Type 6063-T5 Aluminum is easy to work with, and has good finishing characteristics. Commonly referred to as the architectural alloy, This alloy is used extensively in window, store front and door frames. It is the best alloy suited for anodizing applications. The T5 designation indicates it has been artificially aged and moderately heat treated. (Chemical symbol Al) Element No. 13 of the periodic system and it has an Atomic weight of 26.97. Silvery white metal of valence 3. With a melting point of 1220 Degrees F & a boiling point approximately 4118 Degrees F. Aluminum is ductile and malleable yet stable against normal atmospheric corrosion, but attacked by both acids and alkalis.