Heat treatable aluminum alloys having magnesium and zinc and methods for producing the same

A method comprising:

• (a) preparing an aluminum alloy body for post-solutionizing cold working, the aluminum alloy body comprising 3.0-6.0 wt. % magnesium and 2.5-5.0 wt. % zinc, where at least one of the magnesium and the zinc is the predominate alloying element of the aluminum alloy body other than aluminum, and wherein (wt. % Mg)/(wt. % Zn) is from 0.6 to 2.40;
• (i) wherein the preparing comprises solutionizing the aluminum alloy body;
• (b) after the preparing step, cold working the aluminum alloy body, wherein the cold rolling induces at least 25% cold work in the aluminum alloy body;
• (c) after the cold working step, thermally treating the aluminum alloy body, wherein the thermally treating step comprises:
• (i) forming the aluminum alloy body into a predetermined shaped product, wherein, during the forming step, the aluminum alloy sheet is subjected to a temperature in the range of from at least 150° F. to below the recrystallization temperature of the aluminum alloy body.