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EN CR009A (Cu-OFE) Oxygen-Free Electronic Copper

CR009A copper is a lightly alloyed grade of copper, formulated for casting. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. CR009A is the EN numeric designation for this material. Cu-OFE is the EN chemical designation. Additionally, the British Standard (BS) designation is C110.

The graph bars on the material properties cards below compare CR009A copper to: cast coppers (top), all copper alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.

Mechanical Properties

Elastic (Young's, Tensile) Modulus

120 GPa 17 x 106 psi

Elongation at Break

15 %

Poisson's Ratio


Shear Modulus

43 GPa 6.3 x 106 psi

Tensile Strength: Ultimate (UTS)

230 MPa 33 x 103 psi

Tensile Strength: Yield (Proof)

140 MPa 20 x 103 psi

Thermal Properties

Latent Heat of Fusion

210 J/g

Maximum Temperature: Mechanical

200 °C 390 °F

Melting Completion (Liquidus)

1090 °C 2000 °F

Melting Onset (Solidus)

1040 °C 1900 °F

Specific Heat Capacity

390 J/kg-K 0.092 BTU/lb-°F

Thermal Conductivity

380 W/m-K 220 BTU/h-ft-°F

Thermal Expansion

17 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

100 % IACS

Electrical Conductivity: Equal Weight (Specific)

100 % IACS

Otherwise Unclassified Properties

Base Metal Price

31 % relative


9.0 g/cm3 560 lb/ft3

Embodied Carbon

2.6 kg CO2/kg material

Embodied Energy

41 MJ/kg 18 x 103 BTU/lb

Embodied Water

310 L/kg 37 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

31 MJ/m3

Resilience: Unit (Modulus of Resilience)

83 kJ/m3

Stiffness to Weight: Axial

7.2 points

Stiffness to Weight: Bending

18 points

Strength to Weight: Axial

7.1 points

Strength to Weight: Bending

9.3 points

Thermal Diffusivity

110 mm2/s

Thermal Shock Resistance

8.1 points

Alloy Composition

Among cast copper alloys, the composition of CR009A copper is notable for including cadmium (Cd) and tellurium (Te). Cadmium is used to improve strength at elevated temperatures. Tellurium is used to improve machinability.

Copper (Cu)Cu 99.99 to 100
Phosphorus (P)P 0 to 0.0030
Silver (Ag)Ag 0 to 0.0025
Sulfur (S)S 0 to 0.0015
Nickel (Ni)Ni 0 to 0.0010
Iron (Fe)Fe 0 to 0.0010
Manganese (Mn)Mn 0 to 0.00050
Lead (Pb)Pb 0 to 0.00050
Arsenic (As)As 0 to 0.00050
Antimony (Sb)Sb 0 to 0.00040
Tin (Sn)Sn 0 to 0.00020
Bismuth (Bi)Bi 0 to 0.00020
Selenium (Se)Se 0 to 0.00020
Tellurium (Te)Te 0 to 0.00020
Zinc (Zn)Zn 0 to 0.00010
Cadmium (Cd)Cd 0 to 0.00010

All values are % weight. Ranges represent what is permitted under applicable standards.

Followup Questions

Similar Alloys

Further Reading

EN 1976: Copper and copper alloys - Cast unwrought copper products