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UNS C73100 Nickel Silver

C73100 nickel silver is a copper-nickel alloy formulated for primary forming into wrought products. It has a moderately low embodied energy among the wrought copper-nickels in the database.

The properties of C73100 nickel silver include three 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 C73100 nickel silver to: wrought copper-nickels (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

110 GPa 16 x 106 psi

Elongation at Break

3.4 to 8.0 %

Poisson's Ratio

0.32

Shear Modulus

43 GPa 6.2 x 106 psi

Shear Strength

260 to 370 MPa 38 to 53 x 103 psi

Tensile Strength: Ultimate (UTS)

450 to 640 MPa 65 to 93 x 103 psi

Tensile Strength: Yield (Proof)

420 to 590 MPa 62 to 86 x 103 psi

Thermal Properties

Latent Heat of Fusion

190 J/g

Maximum Temperature: Mechanical

170 °C 330 °F

Melting Completion (Liquidus)

1030 °C 1880 °F

Melting Onset (Solidus)

1000 °C 1830 °F

Specific Heat Capacity

390 J/kg-K 0.093 BTU/lb-°F

Thermal Conductivity

35 W/m-K 20 BTU/h-ft-°F

Thermal Expansion

19 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

7.5 % IACS

Electrical Conductivity: Equal Weight (Specific)

8.0 % IACS

Otherwise Unclassified Properties

Base Metal Price

28 % relative

Density

8.4 g/cm3 530 lb/ft3

Embodied Carbon

3.0 kg CO2/kg material

Embodied Energy

49 MJ/kg 21 x 103 BTU/lb

Embodied Water

310 L/kg 37 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

21 to 35 MJ/m3

Resilience: Unit (Modulus of Resilience)

790 to 1560 kJ/m3

Stiffness to Weight: Axial

7.5 points

Stiffness to Weight: Bending

19 points

Strength to Weight: Axial

15 to 21 points

Strength to Weight: Bending

15 to 20 points

Thermal Diffusivity

11 mm2/s

Thermal Shock Resistance

15 to 21 points

Alloy Composition

Among wrought copper alloys, the composition of C73100 nickel silver is notable for including manganese (Mn) and tin (Sn). Manganese is used to improve strength without a proportional reduction in ductility. Tin is used to improve strength, bearing properties, and corrosion resistance against certain types of media.

Copper (Cu) 70.8 to 78
Zinc (Zn) 18 to 22
Nickel (Ni) 4.0 to 6.0
Manganese (Mn) 0 to 0.5
Iron (Fe) 0 to 0.1
Tin (Sn) 0 to 0.1
Lead (Pb) 0 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

CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015