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UNS C16200 (CW131C) Cadmium Copper

C16200 copper is a lightly alloyed grade of copper, formulated for primary forming into wrought products. CW131C is the EN numeric designation for this material. C16200 is the UNS number. Additionally, the EN chemical designation is CuCd1.

The properties of C16200 copper include three common variations. This page shows summary ranges across all of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare C16200 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

2.0 to 56 %

Fatigue Strength

100 to 210 MPa 15 to 30 x 103 psi

Poisson's Ratio


Shear Modulus

43 GPa 6.2 x 106 psi

Shear Strength

190 to 390 MPa 27 to 56 x 103 psi

Tensile Strength: Ultimate (UTS)

240 to 550 MPa 35 to 80 x 103 psi

Tensile Strength: Yield (Proof)

48 to 470 MPa 7.0 to 69 x 103 psi

Thermal Properties

Latent Heat of Fusion

210 J/g

Maximum Temperature: Mechanical

370 °C 700 °F

Melting Completion (Liquidus)

1080 °C 1970 °F

Melting Onset (Solidus)

1030 °C 1890 °F

Specific Heat Capacity

380 J/kg-K 0.092 BTU/lb-°F

Thermal Conductivity

360 W/m-K 210 BTU/h-ft-°F

Thermal Expansion

17 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

90 % IACS

Electrical Conductivity: Equal Weight (Specific)

90 % IACS

Otherwise Unclassified Properties

Base Metal Price

30 % 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 38 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

10 to 99 MJ/m3

Resilience: Unit (Modulus of Resilience)

10 to 970 kJ/m3

Stiffness to Weight: Axial

7.2 points

Stiffness to Weight: Bending

18 points

Strength to Weight: Axial

7.4 to 17 points

Strength to Weight: Bending

9.6 to 17 points

Thermal Diffusivity

100 mm2/s

Thermal Shock Resistance

8.7 to 20 points

Alloy Composition

Among wrought copper alloys, the composition of C16200 copper is notable for including cadmium (Cd). Cadmium is used to improve strength at elevated temperatures.

Copper (Cu)Cu 98.6 to 99.3
Cadmium (Cd)Cd 0.7 to 1.2
Iron (Fe)Fe 0 to 0.2

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

Followup Questions

Similar Alloys

Further Reading

Copper Alloys: Preparation, Properties and Applications, Michael Naboka and Jennifer Giordano (editors), 2013

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

Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM Handbook vol. 2, ASM International, 1993