6061-T6511 Aluminum Square Bar                                             6061 is one of the most common alloys of aluminum in use today. It combines workabilty, weldability, and corrosion resistance into one alloy with medium strength. Can be used for all types of applications. 6061 alloy is heat treatable to attain higher hardness. Square bar is produced by extruding the aluminum (pushing through a die) to produce dimensional sizes.