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UNS C17510 (CW110C) Nickel-Beryllium Copper

C17510 copper is a lightly alloyed grade of copper, formulated for primary forming into wrought products. CW110C is the EN numeric designation for this material. C17510 is the UNS number. Additionally, the EN chemical designation is CuNi2Be. Older literature may refer to this material as ASTM Alloy 3 or ASTM Alloy 14.

It has a moderately high base cost and a moderately high embodied energy among wrought coppers.

The properties of C17510 copper include four 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 C17510 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

5.4 to 37 %

Poisson's Ratio


Rockwell B Hardness

44 to 99

Shear Modulus

44 GPa 6.4 x 106 psi

Shear Strength

210 to 500 MPa 30 to 73 x 103 psi

Tensile Strength: Ultimate (UTS)

310 to 860 MPa 45 to 130 x 103 psi

Tensile Strength: Yield (Proof)

120 to 750 MPa 18 to 110 x 103 psi

Thermal Properties

Latent Heat of Fusion

220 J/g

Maximum Temperature: Mechanical

220 °C 430 °F

Melting Completion (Liquidus)

1070 °C 1950 °F

Melting Onset (Solidus)

1030 °C 1880 °F

Specific Heat Capacity

390 J/kg-K 0.092 BTU/lb-°F

Thermal Conductivity

210 W/m-K 120 BTU/h-ft-°F

Thermal Expansion

17 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

22 to 54 % IACS

Electrical Conductivity: Equal Weight (Specific)

23 to 54 % IACS

Otherwise Unclassified Properties

Base Metal Price

49 % relative


8.9 g/cm3 560 lb/ft3

Embodied Carbon

4.2 kg CO2/kg material

Embodied Energy

65 MJ/kg 28 x 103 BTU/lb

Embodied Water

310 L/kg 37 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

39 to 92 MJ/m3

Resilience: Unit (Modulus of Resilience)

64 to 2410 kJ/m3

Stiffness to Weight: Axial

7.4 points

Stiffness to Weight: Bending

18 points

Strength to Weight: Axial

9.7 to 27 points

Strength to Weight: Bending

11 to 23 points

Thermal Diffusivity

60 mm2/s

Thermal Shock Resistance

11 to 30 points

Alloy Composition

Among wrought copper alloys, the composition of C17510 copper is notable for including beryllium (Be) and cobalt (Co). Beryllium is used to permit precipitation hardening (which increases strength) without much effect on electrical conductivity, but at the cost of substantial toxicity. Cobalt is used to improve strength.

Copper (Cu)Cu 95.9 to 98.4
Nickel (Ni)Ni 1.4 to 2.2
Beryllium (Be)Be 0.2 to 0.6
Cobalt (Co)Co 0 to 0.3
Silicon (Si)Si 0 to 0.2
Aluminum (Al)Al 0 to 0.2
Iron (Fe)Fe 0 to 0.1
Residualsres. 0 to 0.5

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

Followup Questions

Similar Alloys

Further Reading

ASTM B441: Standard Specification for Copper-Cobalt-Beryllium, Copper-Nickel-Beryllium, and Copper-Nickel-Lead-Beryllium Rod and Bar (UNS Nos. C17500, C17510, and C17465)

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

ASM Specialty Handbook: Copper and Copper Alloys, J. R. Davis (editor), 2001