Copper Chromium Zirconium

The C18150 Copper Chromium Zirconium is the copper alloy that is less sticky and resist deformation in comparison to other copper chromium alloys. The alloy is mainly used in cap style resistance welding electrodes and is highly recommended for cold as well as hot rolled spot and seam welding.


  • Consumer Applications : Pencil-type & Light Soldering Guns: Tips, Rod Extensions
  • Electrical Applications : Resistance Welding Electrodes
  • Industrial Applications : Welding Electrodes, Welding Wheels, Tips and Rod Extensions

Chemical Composition:

Min/Max0.5 – 1.5Rem0.02 – 0.20
(1) Cu + Sum of Named Elements 99.7% min.
(2) Cu value includes Ag.


Joining TechniqueSuitability
Machinability Rating20

Physical Properties:

Product PropertyUS CustomaryMetric
Coefficient of Thermal Expansion9.5 ·10-6 per oF (68-572 F)16.45 · 10 6? per °C (20-200 C)
Density0.321 lb/in3 @ 68 F8.89 gm/cm3 @ 20 C
Electrical Conductivity80 %IACS @ 68 F0.464 MegaSiemens/cm @ 20 C
Melting Point Liquid US1976 F1080 C
Melting Point Solid US1958 F1070 C
Modulas of Elasticity in Tension17000 ksi117200 MPa
Specific Gravity8.898.89
Thermal Conductivity187.0 Btu · ft/(hr · ft2 ·°F)
@ 68 F
323.9 W/m · °K at 20 C

Sizes Available:

HOLLOW RODSMin Bore Size 20 mm and Max OD 100 mm
ROUND RODS8mm To 100 mm
HEX10mm To 60mm
SQUARE10mm To 60mm
FLAT10mm Min Thickness and max Width 120mm
BILLETSUp to 200 mm
INGOTSAs per Specification

Copper Chromium Zirconium

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