Alloys or metallic compositions – Silver base – Other noble metal containing
Patent
1993-05-12
1994-12-13
Dean, Richard O.
Alloys or metallic compositions
Silver base
Other noble metal containing
420508, 420511, 420580, 148430, 148442, C22C 506, C22C 502
Patent
active
053727797
ABSTRACT:
A white gold alloy composition consisting essentially of about 35 to 50 weight percent of gold, about 35 to 63 weight percent of silver, about 0.1 to 7 weight percent of a whitening component of zinc, germanium or both, and palladium in an amount of about 9 weight percent or less. The whitening component and the palladium are present in an amount sufficient to impart a white gold appearance and a liquidus temperature of no greater than about 1950.degree. F. to the alloy, preferably between about 1700.degree. and 1900.degree. F., and more preferably less than about 1850.degree. F. Thus, the preferred amount of palladium is about 2 to 5 weight percent and the preferred amount of the whitening component is about 0.5 to 6 weight percent.
REFERENCES:
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Dean Richard O.
Handy & Harman
Vincent Sean
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