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Gold Bulletin

, Volume 22, Issue 4, pp 112–122 | Cite as

The development of 990 gold — titanium: Its production, use and properties

  • Geoffrey Gafner
Open Access
Article

Abstract

Pure gold with only one per cent of titanium may well be the only significantly different new jewellery and coinage alloy developed in recent times. In this paper, an account is given of the development of a 990 fineness gold alloy with good colour, durability and mechanical properties, and why titanium was chosen as the alloying metal. Methods are described for the alloy’s production, solutionizing and age-hardening. Mechanical properties are given as a function of deformation, age-hardening time and temperature for three different starting states. These properties are compared with those of some standard 14 and 18 carat jewellery alloys and pure gold.

Keywords

Pure Gold Salb Boric Oxide Gold Share Relative Wear Resistance 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© World Gold Council 1989

Authors and Affiliations

  • Geoffrey Gafner

There are no affiliations available

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