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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.

Copper (Cu) 97.3 to 99.04
Nickel (Ni) 0.8 to 1.8
Silicon (Si) 0.15 to 0.35
Phosphorus (P) 0.010 to 0.050
Residuals 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