Copper (UNS C19700)

Topics Covered

Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties


Copper mining has been in progress for more than 10,000 years. It is found in the minerals malachite, azurite, cuprite, chalcopyrite and bornite. Large deposits of copper ore are located in Chile, Peru, Zaire, Zambia, and Canada and the United States.

Copper UNS C19700 is a high copper alloy. Copper UNS C19700 possesses good corrosion resistance in natural, marine, and industrial atmosphere. It is resistant to stress corrosion cracking.

The following datasheet discusses the chemical composition and properties of copper UNS C19700.

Chemical Composition

The chemical composition of copper UNS C19700 is given in the following table.

Element Content (%)
Iron, Fe 0.3 - 1.2
Manganese, Mn 0.05 max
Cobalt, Co 0.05 max
Nickel, Ni 0.05 max
Lead, Pb 0.05 max
Tin, Sn 0.02 max
Zinc, Zn 0.02 max
Phosphorus, P 0.1 - 0.4
Magnesium, Mg 0.01 - 0.2
Copper, Cu Balance

Physical Properties

The following table discusses the physical properties of copper UNS C19700.

Properties Metric Imperial
Density 8.9 g/cm3 0.323 lb/in3
Melting point 1069 - 1086 °C 1956 - 1987 °F

Mechanical Properties

The mechanical properties of copper UNS C19700 (H02-temper) are tabulated below.

Properties Metric Imperial
Tensile strength 380 MPa 55100 ksi
Yield strength 315 MPa 45700 ksi
Modulus of elasticity 121 GPa 17500 ksi
Elongation 10% 10%
Hardness, Rockwell B 68 68
Machinability 20 20

Thermal Properties

The thermal properties of copper UNS C19700 (H02-temper) are tabulated below.

Properties Metric Imperial
Thermal expansion co-efficient (@20-100°C/68-212°F) 15.8 µm/m°C 8.78 µin/in°F
Thermal conductivity 320 W/mK 2220 BTU in/hr.ft².°F


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Welding - Soldering and brazing of copper UNS C19700 is rated as excellent. Gas shielded arc welding is rated as excellent. This alloy can also be welding using laser and resistance welding techniques.

Cold and Hot Working – This alloy possesses excellent capacity for both cold and hot forming.


Copper UNS C19700 is basically suited for applications requiring excellent formability coupled with high strength and conductivity.

Copper UNS C19700 finds application in:

  • Stamped parts
  • Electrical and electronic connectors
  • Circuit breaker components
  • Lead frames
  • Fuse clips
  • Cable shielding.

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