Copper Alloy (UNS C79600)

Topics Covered

Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties


UNS designations C73150 to C79900 indicate nickel silvers and leaded nickel silvers, a specific category of copper alloys.

Initially they were widely used as a base metal for silver-plated cutlery and other silverware. Today they are used to manufacture musical instruments, automobile components, jewelry, keys, buckles, and zippers.

The following datasheet discusses the chemical composition and properties of copper UNS C79600.

Chemical Composition

The chemical composition of UNS C79600 copper alloy is outlined in the following table.

Element Content (%)
Copper, Cu + Silver, Ag 43.5-46.5
Nickel, Ni 9-11
Manganese, Mn 1.5-2.5
Lead, Pb 0.8-1.2
Zinc, Zn Balance

Physical Properties

The following table discusses the physical properties of copper UNS C79600.

Properties Metric Imperial
Density 8.39 g/cm3 0.303 lb/in3
Melting point – (liquidus) 927°C 1700°F

Mechanical Properties

The mechanical properties of UNS C79600 copper rod (H04-temper) are tabulated below.

Properties Metric Imperial
Tensile strength 480 MPa 70 ksi
Yield strength 273 MPa 40 ksi
Elongation 15% 15%
Hardness B 70 70

Thermal Properties

The thermal properties of copper UNS C79600 are tabulated below.

Properties Metric Imperial
Thermal expansion co-efficient (@20-300°C/68-572°F) 19 x 10-6 / °C 11 x 10-6 /°F
Thermal conductivity(@20°C/68°F) 36.4 W/mK 21 BTU in/hr.ft2.°F


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