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UNS C14520 Tellurium Copper

C14520 copper is a lightly alloyed grade of copper, formulated for primary forming into wrought products. It can have a moderately low tensile strength and a moderately low ductility among wrought coppers.

The properties of C14520 copper include two common variations. This page shows summary ranges across both of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare C14520 copper to: wrought 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

9.0 to 9.6 %

Poisson's Ratio

0.34

Shear Modulus

43 GPa 6.3 x 106 psi

Shear Strength

170 to 190 MPa 25 to 28 x 103 psi

Tensile Strength: Ultimate (UTS)

290 to 330 MPa 42 to 47 x 103 psi

Tensile Strength: Yield (Proof)

230 to 250 MPa 34 to 37 x 103 psi

Thermal Properties

Latent Heat of Fusion

210 J/g

Maximum Temperature: Mechanical

200 °C 390 °F

Melting Completion (Liquidus)

1080 °C 1970 °F

Melting Onset (Solidus)

1050 °C 1920 °F

Specific Heat Capacity

390 J/kg-K 0.092 BTU/lb-°F

Thermal Conductivity

320 W/m-K 190 BTU/h-ft-°F

Thermal Expansion

17 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

85 % IACS

Electrical Conductivity: Equal Weight (Specific)

85 % IACS

Otherwise Unclassified Properties

Base Metal Price

33 % relative

Density

8.9 g/cm3 560 lb/ft3

Embodied Carbon

2.6 kg CO2/kg material

Embodied Energy

42 MJ/kg 18 x 103 BTU/lb

Embodied Water

310 L/kg 37 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

24 to 29 MJ/m3

Resilience: Unit (Modulus of Resilience)

240 to 280 kJ/m3

Stiffness to Weight: Axial

7.2 points

Stiffness to Weight: Bending

18 points

Strength to Weight: Axial

9.0 to 10 points

Strength to Weight: Bending

11 to 12 points

Thermal Diffusivity

94 mm2/s

Thermal Shock Resistance

10 to 12 points

Alloy Composition

Among wrought copper alloys, the composition of C14520 copper is notable for including tellurium (Te). Tellurium is used to improve machinability.

Copper (Cu) 99.2 to 99.596
Tellurium (Te) 0.4 to 0.7
Phosphorus (P) 0.0040 to 0.020

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

Followup Questions

Similar Alloys

Further Reading

ASTM B301: Standard Specification for Free-Cutting Copper Rod, Bar, Wire, and Shapes

Copper: Its Trade, Manufacture, Use, and Environmental Status, Gunter Joseph, 2001

ASM Specialty Handbook: Copper and Copper Alloys, J. R. Davis (editor), 2001

CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015