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
0.34
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
Density
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.
| Cu | 98.6 to 99.3 | |
| Cd | 0.7 to 1.2 | |
| 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