Patent ID: 9738951
Date: 2017-08-22
CPC Classifications: C22C,C22F

Claim:
1. An age hardenable alloy composition suitable for jewelry consisting of: 74.5% to 75.5% gold, 8% to 12% silver, 6.5% to 7.5% palladium, 0.5% to 3% platinum, 1.0% to 5% zinc, up to 9.5% copper; and at least one selected from the group consisting of: up to 0.03% lithium, up to 0.5% cobalt, up to 0.1% silicon, and up to 0.03% boron; wherein all values are in w % and said composition exhibits a color which is white and shows age hardening characteristics including an annealed hardness of about 140 Vickers, and an aged hardness of up to 210 Vickers.