Aluminum rectangle bar 6061-t6511-extruded is highly versatile and normally used for aerospace, marine, electronic, ornamental, machinery, and structural applications. Making this material ideal for your metal fabrication projects. 6061 aluminum is ideal for its good strength-to-weight ratio, above average corrosion resistance, good machinability, and is excellent for welding. 6061 T6 flat bar stock is available in full size and custom cut lengths.