Silver alloys, investment casting using the alloys and casting grain

摘要

A silver-based alloy which comprising (by weight): 92.5-96 % silver, 0.1-1.5 % germanium, 3-60 ppm iridium, 0-2 % zinc, 0-0.4 % tin, 0-0.3 % indium, 0-0.08 % silicon and 0-60 ppm boron, with the balance being copper and impurities. The alloy can be made into cast and rolled strip or casting grains which can be used for investment casting the alloy.