Abstract: Alloy and cast alloy product ideally suited for use as a component in a vehicle frame or subframe, i.e., body-in-white, comprising an alloy consisting of about 2.80 to 3.60 wt. % magnesium, less than approximately 0.20 wt. % silicon, approximately 1.10 to 1.40 wt. % manganese, less than approximately 0.2 wt. % iron, less than approximately 0.15 wt. % titanium, about 0.0005 to 0.0015 beryllium, the balance substantially aluminum and incidental elements and impurities. The aluminum/magnesium alloy is typically solidified into ingot derived working stock by die casting into a shape suitable for remelt for die casting, which shape is typically an ingot billet. Excellent mechanical properties are obtained from a cast product that is not subjected to heat treating operations subsequent to casting.