Alloys of Silver

A description of various alloys of silver with copper and with gold has been given by several authors. British silver coin and standard plate contain 7.5 per cent, of copper, the product being termed 925 fine." This alloy resembles pure silver in malleability and colour, but is harder and melts at a lower temperature. It solidifies without "spitting," an important point in the production of good castings. In view of the remarkable appreciation in the value of silver, the standard for coinage has been lowered to "500 fine," with addition of nickel. Alloys with the alkali-metals have also been described.