| 摘要 |
A nickel-free white gold alloy composition having selectively reversible hardness characteristics between its annealed- and aged-hardness values, consists essentially of: about 55-60% gold; about 6.0-10.0% palladium; about 5.0-12.0% copper; about 0.1-2.0% zinc; and about 20-30% silver. A 14-karat nickel-free white gold alloy composition, consists essentially of: about 58.5% gold; about 25.0-27.15% silver; about 6.0% palladium; about 5.0-12.0% copper; about 0-2.0% zinc; about 0-0.2% cobalt; about 0-0.005% iridium; and about 0-0.01% lithium.
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