A method of manufacturing a hard precious metal alloy member comprising casting a material consisting essentially of a gold alloy, which has a gold content of from 37.50 to 98.45 wt %, and contains gadolinium in an amount of not less than 50 ppm, but less than 1,5000 ppm; subjecting the material to a solution heat treatment; and subjecting the material to an aging treatment after the solution heat treatment.

 
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< Hot-dip galvanized hot-rolled and cold-rolled steel sheets excellent in strain age hardening property

> High tensile hot rolled steel sheet excellent in shape freezing property and endurance fatigue characteristics after forming

~ 00445