C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
75/62
C22C 5/02 (2006.01) C22C 9/00 (2006.01)
Patent
CA 1163469
ABSTRACT OF THE DISCLOSURE: A gold alloy classified into 8 to 12 carats contains 30.0 to 50% by weight of gold;0 to 5% of an element selected in the group consisting of Pt, Pd, Ru, Sn and mixtures thereof;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.
343920
Kabushiki Kaisha Murao Shoten
Robic Robic & Associes/associates
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