US6921512B2 Aluminum alloy for engine blocks Google Patents
The alloy comprises, by weight, 9.5 to 12.5 silicon, 0.1 to 1.5 iron, 1.5 to 4.5 copper, 0.2 to 3 manganese, 0.1 to 0.6 magnesium, 2.0 max zinc, 0 to 1.5 nickel, 0.25 maximum titanium, up to 0.05 strontium and the balance aluminum, where the weight ratio of manganese to iron is 1.2 to 1.75 or higher when the iron content is equal to or ...