Patent ID: 11970762
Assignee: nan
Field: Materials, metallurgy (Chemistry)
Classification: CPC C | IPC C

Claim 20:
21. The gold alloy composition as claimed in claim 19, wherein the gold alloy is a 21-carat gold alloy having a specific gravity of 16.69 g/cc; hardness of 205-230 Vickers HV-0.05 ASM F 384-11 consisting essentially of:
87.5 to 88% by weight of gold,
0.01 to 1.5% by weight of zirconium,
0.01 to 1.5% by weight of titanium,
0 to 12.48% by weight of copper,
0 to 3.05% by weight of zinc,
0 to 3.05% by weight of silver.