Patent ID: 8980168
Filing Date: 2015-03-17
Classification: C22C

Abstract:
1. A beryllium aluminum alloy suitable for investment casting purposes, the alloy comprising 40 to 55 wt. % Be, 3.0-11 wt. % Si, 1.2 to 5.0 wt. % Ag, and no more than 3 wt. % optional ingredients, with the balance being aluminum plus incidental impurities, wherein the Be/Al ratio of the alloy is ≦1.8, the Si/Al ratio of the alloy is ≧0.07, and the combined amounts of Si and Ag in the alloy is ≧5.0 wt. %, and further wherein the alloy has a coefficient of thermal expansion of ≦14.5 μm/m (ppm) and a thermal conductivity of at least 150 W/M-° K@30° C.