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UNS C19000 (CW108C) Nickel-Phosphorus Copper

C19000 copper is a lightly alloyed grade of copper, formulated for primary forming into wrought products. CW108C is the EN numeric designation for this material. C19000 is the UNS number. Additionally, the EN chemical designation is CuNi1P. And the British Standard (BS) designation is C113.

The properties of C19000 copper include seven 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 C19000 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

2.5 to 50 %

Poisson's Ratio


Rockwell B Hardness

45 to 94

Shear Modulus

43 GPa 6.3 x 106 psi

Shear Strength

170 to 390 MPa 25 to 57 x 103 psi

Tensile Strength: Ultimate (UTS)

260 to 760 MPa 38 to 110 x 103 psi

Tensile Strength: Yield (Proof)

140 to 630 MPa 21 to 92 x 103 psi

Thermal Properties

Latent Heat of Fusion

210 J/g

Maximum Temperature: Mechanical

200 °C 390 °F

Melting Completion (Liquidus)

1080 °C 1980 °F

Melting Onset (Solidus)

1040 °C 1900 °F

Specific Heat Capacity

390 J/kg-K 0.092 BTU/lb-°F

Thermal Conductivity

250 W/m-K 150 BTU/h-ft-°F

Thermal Expansion

17 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

60 % IACS

Electrical Conductivity: Equal Weight (Specific)

61 % IACS

Otherwise Unclassified Properties

Base Metal Price

31 % relative


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)

18 to 110 MJ/m3

Resilience: Unit (Modulus of Resilience)

89 to 1730 kJ/m3

Stiffness to Weight: Axial

7.2 points

Stiffness to Weight: Bending

18 points

Strength to Weight: Axial

8.2 to 24 points

Strength to Weight: Bending

10 to 21 points

Thermal Diffusivity

73 mm2/s

Thermal Shock Resistance

9.3 to 27 points

Alloy Composition

Among wrought copper alloys, the composition of C19000 copper is notable for including phosphorus (P) and nickel (Ni). Phosphorus is used as an alloy deoxidizer, and to reduce vulnerability to dezincification. Nickel is used to improve strength (particularly at elevated temperatures) and corrosion resistance.

Copper (Cu)Cu 96.9 to 99
Nickel (Ni)Ni 0.9 to 1.3
Zinc (Zn)Zn 0 to 0.8
Phosphorus (P)P 0.15 to 0.35
Iron (Fe)Fe 0 to 0.1
Lead (Pb)Pb 0 to 0.050
Residualsres. 0 to 0.5

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

Followup Questions

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