GOLD ALLOY INCLUDING HARDNESS IMPROVING ELEMENTS
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United States of America Patent
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Issued Date -
Oct 29, 2020
app pub date -
Aug 8, 2019
filing date -
Apr 23, 2019
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Abstract
The present disclosure provides for a gold alloy composition that has a greater hardness than conventional gold alloys of the same composition. The gold alloy composition includes 96.4-97% gold by weight. The composition also includes elements improving hardness and golden yellow color in the proportion of 3-3.6% by weight, which are one or more elements among: silver, copper, zinc, nickel, cobalt, gallium, tin, antimony, and iron. The composition also includes elements improving the flowing of melted gold alloy and surface smoothness, which are one or more elements among: iridium, palladium, aluminum, indium, silicon, germanium and lead. An example procedure is also provided to increase the hardness of gold alloys.
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