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