An aluminum casting alloy consisting essentially of, by weight, 11.25 to 11.75% silicon, 0.35 to 0.65% iron, 1.75 to 2.75% copper, 0.4 to 1.2% manganese, 0.15 a trace of nickel, 0.2% maximum titanium, 0.01% to 0.03% strontium, and aluminum, where the weight ratio of manganese to iron is at least 1.2 when the ...
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