GOLD ALLOY

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FIELD : metallurgy, possibly manufacture of parts of instruments and precise mechanical devices, medical equipment, dentures, glasses rims, jewelry.SUBSTANCE : in order to improve mechanical properties of gold alloy it contains, mass% : gold, 57.0 - 59.0; silver, 8.0 - 10.0; boron, 0.01 - 0.02; rare earth metal, 0.05 - 0.1; zinc, 3.0 - 4.0; zirconium, 1.0 - 1.5; copper, the balance.EFFECT : enhanced mechanical properties of gold alloy.1 tbl