... its own thin, transparent oxide film. Aluminum's natural protective properties and color can be enhanced by chemical or electrochemical means. ... to permit machining at even higher speeds.Easily joinedAluminum alloys can be joined by welding, brazing, soldering, adhesive bonding, ... of nuts, bolts, rivets, etc.Formed easilyExtruded shapes can be formed or bent using conventional equipment. Minimum radii ...