Jewellery alloy compositions

C - Chemistry – Metallurgy – 22 – C

Patent

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C22C 5/02 (2006.01) A44C 3/00 (2006.01) A44C 7/00 (2006.01) A44C 9/00 (2006.01) A44C 11/00 (2006.01) A44C 21/00 (2006.01) A44C 25/00 (2006.01) A44C 27/00 (2006.01)

Patent

CA 2361692

A jewellery alloy, having a substantially purple hue and sufficient toughness to withstand Rockwell B hardness testing with a 100 kg load without shattering, comprises 76 to 83.5 wt.% gold and 16.5 to 21.5 wt.% aluminium. In one embodiment, the alloy consists of more than 78.5 wt.% gold (but not more than 83.5 wt.%) and a balance of aluminium. In another embodiment, the alloy comprises an additional element selected from palladium and nickel.

Alliage de bijouterie possédant une teinte pratiquement violette et une robustesse suffisante pour résister à un test de dureté de Rockwell B avec une charge de 100 kg sans se briser, contenant 76 à 83,5 % d'or et 16,5 à 21,5 % en poids d'aluminium. Dans un mode de réalisation, cet alliage est constitué par plus de 78,5 % en poids d'or (mais pas davantage que 83,5 % en poids) et par de l'aluminium. Dans un autre mode de réalisation, cet alliage contient un élément supplémentaire sélectionné dans palladium et nickel.

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