CuCr1Zr C18150 plate copper alloy disk

Chromium zirconium Alloy C18150 has good thermal and electrical conductivity. More than 400 types of these copper alloys are available, but C18150 is highly preferred since it has high strength and wear resistance at elevated temperatures. C18150 is used extensively for cap-style resistance welding electrodes. It can provide less sticking and resist deformation for much longer than its copper-chrome counterpart in some specific situations.

The chemical composition of C18150 is 1% chromium, 98.85% copper, and 0.15% zirconium. The addition of Zirconium to chromium copper improves creep resistance at high operating temperatures and reduces sticking of electrodes to the work during spot welding of galvanized or coated materials. The physical copper properties of C18150 include a density of 8.89 grams per cubic centimeter.


CuCr1Zr C18150 plate copper alloy disk | Welding roller

Typical Application for C18150 Chromium Zirconium Copper Alloys:

Electrical Industry: Resistance Welding Electrodes, Circuit Breaker Switches
Consumer: Rod Extensions, Pencil-type, Light Soldering Guns, Tips
Industrial: Welding Wheels, Tips and Rod extensions for resistance seam and spot welding

Available Sizes:
Custom Diameter & Sizes, Random Mill lengths

Available Products (forms):

Round bars, Flat bars, Square bars, Rectangular bars, Hexagon bars, Plates
Custom shapes are available upon request.

Chemical Composition:

Cr: 0.50-1.50%
Zr: 0.05-0.25%
Cu: Balance
Note: Copper plus additions equal 99.70% minimum.

Typical Physical Properties:

Density at 68°F: 0.321 Lbs./In.3
Specific Gravity: 8.89
Melting Point (Liquidus): 1080°C (1976°F)
(Solidus): 1070°C (1958°F)
Coefficient of Thermal Expansion per °F: 9.5 x 10-6 (77-212°F)
Electrical Conductivity at 68°F (volumetric): 80% IACS (aged and drawn)
Thermal Conductivity Btu/ft.2/ft./hr./°F at 68°F: 187
Modulus of Elasticity – Tension: 17,000 ksi


Product Application Cases