C18150 Chromium Zirconium Copper

The following data is provided for informational purposes only. It was provided with permission by the Copper Development Association at www.copper.org.

Last Update: Jan 10, 2007

Chemical Composition (%max., unless shown as range or min.)

Cu(1) CR Zr
Min./Max. Rem. .50–1.5 .05-.25
Nominal 98.9 1.0 .10

(1) Cu value includes Ag.
Note: Cu + Sum of Named Elements, 99.7% min.

Applicable Specifications
No information available.

Common Fabrication Processes
Bending, Cold Heading, Machining

Fabrication Properties

Joining Technique Suitability
Machinability Rating 20

Physical Properties

US Customary Metric
Melting Point – Liquidus 1976 F 1080 C
Melting Point – Solidus 1958 F 1070 C
Density 0.321 lb/in3 at 68 F 8.89 gm/cm3 @ 20 C
Specific Gravity 8.89 8.89
Electrical Conductivity 80% IACS @ 68 F 0.464 MegaSiemens/cm @ 20 C
Thermal Conductivity 187.0 Btu · ft/(hr · ft2·oF)at 68F 323.9 W/m · oK at 20 C
Coefficient of Thermal Expansion 9.5 ·10-6 per oF (68-212 F) 16.45 ·10-6 per oC (20-100 C)
Modulas of Elasticity in Tension 17000 ksi 117200 MPa

Tempers Most Commonly Used
No information available.

Typical Uses

Consumer
Pencil-type & Light Soldering Guns: Tips, Rod Extensions

Electrical
Resistance Welding Electrodes

Industrial
Welding Electrodes, Welding Wheels, Tips and Rod Extensions