Gold alloy with copper, silver and zinc

Details Gold alloy with copper, silver and zinc Gold alloy with copper, silver and zinc

1980-01-07

1981-06-30

Rutledge, L. Dewayne

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75134B, 75165, C22C 3000

Patent

active

042760860

ABSTRACT:
A gold alloy classified into 8 to 12 carats contains 30.0 to 50.0% by weight of gold and the remainder is an alloying composition which includes 75.2-77.1% of copper, 13.6 to 16.2% of silver and 6.7 to 11.2% of zinc. The preferred alloys are 9 and 10 carats. The alloys exhibit satisfactory color tone and luster and have improved physical and chemical properties including workability, hardness, chemical resistance and perspiration resistance. The alloys are fabricated into articles which are surface finished by buffing or electrolytic polishing.

REFERENCES:
patent: 2042155 (1936-05-01), Leach
patent: 2200050 (1940-05-01), Auswarter
patent: 2216495 (1940-10-01), Loebich
patent: 2229463 (1941-01-01), Leach
patent: 2270594 (1942-01-01), Leuser
patent: 2274863 (1942-03-01), Leuser
patent: 2596454 (1952-05-01), Williams
patent: 4012228 (1977-03-01), Dudek et al.

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