6061 aluminum is a precipitation aluminum alloy, containing magnesium, and silicon as its major alloying elements. This is the most versatile of the heat treatable aluminum alloys. It has most of the good qualities of aluminum, and it offers a wide range of mechanical properties and corrosion resistance. Sheet metal is more than .250” thick and most often used for heavy duty application. This is more common in homemade, military or commercial aircraft, architectural applications, bridges, transportation equipments. It can be welded by all methods and can be furnace brazed.