Chromium Copper Alloy UNS C18150

Topics Covered

Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties


Pure copper has good electrical and thermal conductivity. More than 400 varieties of copper alloys are available. UNS C18150 chromium copper alloys have high strength and wear resistance at elevated temperatures. They are available in the form of bar, rod and plate.

The following datasheet gives details about UNS C18150 chromium copper alloys.

Chemical Composition

The following table shows the chemical composition of UNS C18150 copper alloys.

Element Content (%)
Cr 1
Cu 98.85
Zr 0.15

Physical Properties

The physical properties of UNS C18150 copper alloys are outlined in the following table.

Properties Metric Imperial
Density 8.89 g/cm3 0.321 lb/in3

Mechanical Properties

The mechanical properties of UNS C18150 copper alloys are tabulated below.

Properties Metric Imperial
Hardness, Rockwell B (@ 50.8 - 76.2 mm/ 2.00 - 3.00 in.) 65 65
Hardness, Rockwell B (@ 25.4 - 50.8 mm/ 1.00 - 2.00 in.) 70 70
Hardness, Rockwell B (@ 25.4 mm/1.00 in., heat treated) ≥ 75 ≥ 75
Tensile strength at break (any thickness) ≥ 379 MPa ≥ 55000 psi
Yield strength (@ 0.500%, any thickness) ≥ 379 MPa ≥ 55000 psi
Modulus of elasticity 117 GPa 17000 ksi
Poisson’s ratio 0.181 0.181
Shear modulus 49.6 GPa 7200 ksi

Thermal Properties

The thermal properties of UNS C18150 copper alloys are given in the following table.

Properties Metric English
Thermal conductivity 323.4 W/mK 2244 BTU in/hr.ft².°F


UNS C18150 copper alloys are mainly used in high stress and high temperature applications that include:

  • Electrical components
  • Welding electrodes
  • Studs
  • Contacts

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