Aluminum stock A7 - is primary technical purity aluminum, molded into bars of non-regulated dimensions. The basic chemical composition of aluminum A7 includes: iron - up to 0.16%, silicon - up to 0.15%, titanium - up to 0.01%, manganese - 0.03%, copper - up to 0.01%, zinc - up to 0.04%, and of course aluminum - 99.7% (impurities not more than 0.02%!). Stock A7 is a raw material for the production of alloys with the presence of aluminum.