Aluminum alloys and process for making aluminum alloy sheet

Abstract From the Canadian patent

An alloy of aluminum containing magnesium silicon and optionally copper in , amounts in percent by weight as shown in the figure i.e. approximately , falling within one of the following ranges: (1) 0.4 <= Mg < 0.8 0.2 <= Si < , 0.5, 0.3 <= Cu <= 3.5; (2) 0.8 <= Mg <= 1.4 0.2 <= Si < 0.5, Cu <= 2.5; and , (3) 0.4 <= Mg <= 1.0 0.5 <= Si <= 1.4, Cu <= 2Ø The alloy may also contain at least one additional element selected from Fe in an amount of 0.4 percent by weight or less, Mn in an amount of 0.4 percent by weight or less Zn in an , amount of 0.3 percent by weight or less and a small amount of at least one other element, such as Cr, Ti, Zr and V. The alloy may be fabricated into sheet …