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UNS C77100 Nickel Silver

C77100 nickel silver is a copper-nickel alloy formulated for primary forming into wrought products. Cited properties are appropriate for the H02 (half hard) temper. It has a moderately low base cost and a moderately high tensile strength among wrought copper-nickels.

The graph bars on the material properties cards below compare C77100 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

Poisson's Ratio

0.31

Shear Modulus

45 GPa 6.5 x 106 psi

Tensile Strength: Ultimate (UTS)

600 MPa 88 x 103 psi

Tensile Strength: Yield (Proof)

540 MPa 78 x 103 psi

Thermal Properties

Latent Heat of Fusion

180 J/g

Maximum Temperature: Mechanical

150 °C 300 °F

Melting Completion (Liquidus)

990 °C 1820 °F

Melting Onset (Solidus)

950 °C 1740 °F

Specific Heat Capacity

390 J/kg-K 0.094 BTU/lb-°F

Thermal Conductivity

40 W/m-K 23 BTU/h-ft-°F

Thermal Expansion

20 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

7.6 % IACS

Electrical Conductivity: Equal Weight (Specific)

8.5 % IACS

Otherwise Unclassified Properties

Base Metal Price

27 % relative

Density

8.1 g/cm3 500 lb/ft3

Embodied Carbon

3.5 kg CO2/kg material

Embodied Energy

56 MJ/kg 24 x 103 BTU/lb

Embodied Water

310 L/kg 37 gal/lb

Common Calculations

Resilience: Unit (Modulus of Resilience)

1280 kJ/m3

Stiffness to Weight: Axial

7.8 points

Stiffness to Weight: Bending

20 points

Strength to Weight: Axial

21 points

Strength to Weight: Bending

20 points

Thermal Diffusivity

13 mm2/s

Thermal Shock Resistance

19 points

Alloy Composition

Among wrought copper alloys, the composition of C77100 nickel silver is notable for including manganese (Mn) and nickel (Ni). Manganese is used to improve strength without a proportional reduction in ductility. Nickel is used to improve strength (particularly at elevated temperatures) and corrosion resistance.

Copper (Cu) 52 to 56
Zinc (Zn) 30.6 to 39
Nickel (Ni) 9.0 to 12
Manganese (Mn) 0 to 0.9
Lead (Pb) 0 to 0.030
Residuals 0 to 0.5

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

Followup Questions

Similar Alloys

Further Reading

Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM Handbook vol. 2, ASM International, 1993