Patent ID: 9677158
Date: 2017-06-13
CPC Classifications: B22D,C22C,C22F

Claim:
1. An aluminum casting alloy capable of temperature-elevated age-hardening, the alloy comprising: at least about 84 weight percent aluminum (Al); about 9.5 to about 13 weight percent silicon (Si); about 0.2 to about 0.6 weight percent magnesium (Mg); about 1 to 2 weight percent iron (Fe); and about 0.1 to 2 weight percent manganese (Mn); about 0.1 to 1 weight percent nickel (Ni); about 0.5 to 3.0 weight percent zinc (Zn); and about 0.1 weight percent [500 ppm] strontium (Sr); wherein the ratio of weight percent Mn:Fe is about 0.5 to about 3, and the total amount of Mn+Fe is from about 0.5 to about 1.5 weight percent, further wherein the alloy is free of copper (Cu), and further wherein the alloy exhibits a eutectic phase in the range of 15-16 volume percent and solidifies at a temperature of from about 500° C. to about 650° C.