History of Technology in India, Vol. I: From Antiquity to c. 1200 A.D. v1.c13.s2.t9.2

v1.c13.s2.t9.2

Similarly copper was added to the gold to impart hardness and better strength as well as more reddish colour to the metal. Au- Cu binary alloy system is characterised by the formation of Eutectic at 20% Cu, having a M.P. of 889°C. In recent years detailed studies of the binary, ternary and even quaternary alloy systems have been studied and published. The details of the binary alloy systems can be found in the book by Hansen(1958).