| 摘要 |
PURPOSE: An alloy composition for low-purity gold and low-purity gold using the same are provided to express a color of gold as it is even though a trace of Au is added because Ag and Cu are mixed to brass corresponding to an alloy of the Cu and Zn at a set rate. CONSTITUTION: An alloy composition(104) for low-purity gold is manufactured by mixing Ag 20.5wt.% of 99.99% purity, Cu 8.5wt.% of 99.99% purity, Pt 0.1wt.% of 99.99% purity, Pd 0.1wt.% of 99.99% purity, and iridium 0.1wt.% of 99.99% purity to brass 70.7wt.%. Pure gold of 0.834wt.% or 1.668wt.% is added to an alloy composition so that low-purity gold becomes 2K-gold or 4K-gold. |
