PROBLEM TO BE SOLVED: To provide a casting gold alloy which is used for dental care and accessories, shows a full gold color and inhibits thermal deformation.SOLUTION: The gold alloy comprises, by mass%, 83.0 to 90.0% Au, 8.0 to 10.0% Pt, 1.0 to 2.0% In and 0.1 to 1.5% Co.COPYRIGHT: (C)2008,JPO&INPIT【課題】歯科治療や装身具に用いる鋳造用金合金において、豊かな黄金色を発現させ、かつ、熱変形を抑制すること。【解決手段】Au:83.0~90.0質量%、Pt:8.0~10.0質量%、In:1.0~2.0質量%及びCo:0.1~1.5質量%からなる金合金を用いる。【選択図】なし