Because of their savings in cost and comparable mechanical and handling properties, low-gold-content dental casting alloys will remain an attractive alternative to high-gold-content alloys. Certain compositions perform well in the corrosive oral environment; others do not. Accurate information on such performance is currently unavailable. Accurate prediction of tarnish and ocrrosion behavior awaits development and acceptance of reliable and valid performance tests. There is adequate evidence that not only the Ag, Cu, and Pd ratios are important for resistance to corrosion but also the addition of minor amounts of other elements may be important for adequate clinical performance.