UNS C19010 (CW109C) Nickel-Silicon Copper
C19010 copper is a lightly alloyed grade of copper, formulated for primary forming into wrought products. CW109C is the EN numeric designation for this material. C19010 is the UNS number. Additionally, the EN chemical designation is CuNi1Si.
It has a moderately low melting temperature among the wrought coppers in the database.
The properties of C19010 copper include eleven 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 C19010 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
2.4 to 22 %
Poisson's Ratio
0.34
Shear Modulus
43 GPa 6.3 x 106 psi
Shear Strength
210 to 360 MPa 30 to 53 x 103 psi
Tensile Strength: Ultimate (UTS)
330 to 640 MPa 47 to 92 x 103 psi
Tensile Strength: Yield (Proof)
260 to 620 MPa 38 to 91 x 103 psi
Thermal Properties
Latent Heat of Fusion
210 J/g
Maximum Temperature: Mechanical
200 °C 400 °F
Melting Completion (Liquidus)
1060 °C 1940 °F
Melting Onset (Solidus)
1010 °C 1850 °F
Specific Heat Capacity
390 J/kg-K 0.093 BTU/lb-°F
Thermal Conductivity
260 W/m-K 150 BTU/h-ft-°F
Thermal Expansion
17 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
48 to 63 % IACS
Electrical Conductivity: Equal Weight (Specific)
48 to 63 % IACS
Otherwise Unclassified Properties
Base Metal Price
31 % relative
Density
8.9 g/cm3 560 lb/ft3
Embodied Carbon
2.7 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)
7.3 to 140 MJ/m3
Resilience: Unit (Modulus of Resilience)
290 to 1680 kJ/m3
Stiffness to Weight: Axial
7.3 points
Stiffness to Weight: Bending
18 points
Strength to Weight: Axial
10 to 20 points
Strength to Weight: Bending
12 to 18 points
Thermal Diffusivity
75 mm2/s
Thermal Shock Resistance
12 to 23 points
Alloy Composition
Among wrought copper alloys, the composition of C19010 copper is notable for including silicon (Si) and phosphorus (P). Silicon is used to increase strength at the expense of ductility. It also lowers the melting temperature and raises the fluidity of the alloy. Phosphorus is used as an alloy deoxidizer, and to reduce vulnerability to dezincification.
| Cu | 97.3 to 99.04 | |
| Ni | 0.8 to 1.8 | |
| Si | 0.15 to 0.35 | |
| P | 0.010 to 0.050 | |
| res. | 0 to 0.5 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
ASTM B422: Standard Specification for Copper-Aluminum-Silicon-Cobalt Alloy, Copper-Nickel-Silicon-Magnesium Alloy, Copper-Nickel-Silicon Alloy, Copper-Nickel-Aluminum-Magnesium Alloy, and Copper- Nickel-Tin Alloy Sheet and Strip
Copper: Its Trade, Manufacture, Use, and Environmental Status, Gunter Joseph, 2001
ASM Specialty Handbook: Copper and Copper Alloys, J. R. Davis (editor), 2001