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UNS C17465 Nickel-Lead-Beryllium Copper

C17465 copper is a lightly alloyed grade of copper, formulated for primary forming into wrought products. It has a moderately high base cost and a moderately high embodied energy among wrought coppers.

The properties of C17465 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 C17465 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

5.3 to 36 %

Poisson's Ratio


Rockwell B Hardness

44 to 110

Shear Modulus

44 GPa 6.3 x 106 psi

Shear Strength

210 to 540 MPa 30 to 78 x 103 psi

Tensile Strength: Ultimate (UTS)

310 to 930 MPa 45 to 130 x 103 psi

Tensile Strength: Yield (Proof)

120 to 830 MPa 18 to 120 x 103 psi

Thermal Properties

Latent Heat of Fusion

210 J/g

Maximum Temperature: Mechanical

210 °C 420 °F

Melting Completion (Liquidus)

1080 °C 1970 °F

Melting Onset (Solidus)

1030 °C 1880 °F

Specific Heat Capacity

390 J/kg-K 0.092 BTU/lb-°F

Thermal Conductivity

220 W/m-K 130 BTU/h-ft-°F

Thermal Expansion

17 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

22 to 51 % IACS

Electrical Conductivity: Equal Weight (Specific)

23 to 52 % IACS

Otherwise Unclassified Properties

Base Metal Price

45 % relative


8.9 g/cm3 560 lb/ft3

Embodied Carbon

4.1 kg CO2/kg material

Embodied Energy

64 MJ/kg 28 x 103 BTU/lb

Embodied Water

310 L/kg 37 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

47 to 90 MJ/m3

Resilience: Unit (Modulus of Resilience)

64 to 2920 kJ/m3

Stiffness to Weight: Axial

7.3 points

Stiffness to Weight: Bending

18 points

Strength to Weight: Axial

9.7 to 29 points

Strength to Weight: Bending

11 to 24 points

Thermal Diffusivity

64 mm2/s

Thermal Shock Resistance

11 to 33 points

Alloy Composition

Among wrought copper alloys, the composition of C17465 copper is notable for including zirconium (Zr) and beryllium (Be). Zirconium is used to increase recrystallization temperature and to permit or facilitate certain forms of heat treatment. Beryllium is used to permit precipitation hardening (which increases strength) without much effect on electrical conductivity, but at the cost of substantial toxicity.

Copper (Cu)Cu 95.7 to 98.7
Nickel (Ni)Ni 1.0 to 1.4
Lead (Pb)Pb 0.2 to 0.6
Beryllium (Be)Be 0.15 to 0.5
Zirconium (Zr)Zr 0 to 0.5
Tin (Sn)Sn 0 to 0.25
Silicon (Si)Si 0 to 0.2
Iron (Fe)Fe 0 to 0.2
Aluminum (Al)Al 0 to 0.2
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