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UNS C77600 Nickel Silver

C77600 nickel silver is a copper-nickel alloy formulated for primary forming into wrought products. Cited properties are appropriate for the M30 (as hot extruded) condition.

It has a moderately low melting temperature among wrought copper-nickels. In addition, it has a moderately low base cost and a moderately high tensile strength.

The graph bars on the material properties cards below compare C77600 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

30 %

Poisson's Ratio

0.3

Rockwell B Hardness

83

Shear Modulus

43 GPa 6.3 x 106 psi

Shear Strength

410 MPa 60 x 103 psi

Tensile Strength: Ultimate (UTS)

630 MPa 91 x 103 psi

Tensile Strength: Yield (Proof)

320 MPa 47 x 103 psi

Thermal Properties

Latent Heat of Fusion

180 J/g

Maximum Temperature: Mechanical

140 °C 280 °F

Melting Completion (Liquidus)

830 °C 1530 °F

Melting Onset (Solidus)

790 °C 1450 °F

Specific Heat Capacity

390 J/kg-K 0.094 BTU/lb-°F

Thermal Expansion

20 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

27 % IACS

Electrical Conductivity: Equal Weight (Specific)

31 % IACS

Otherwise Unclassified Properties

Base Metal Price

27 % relative

Density

7.9 g/cm3 490 lb/ft3

Embodied Carbon

3.7 kg CO2/kg material

Embodied Energy

60 MJ/kg 26 x 103 BTU/lb

Embodied Water

310 L/kg 37 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

160 MJ/m3

Resilience: Unit (Modulus of Resilience)

470 kJ/m3

Stiffness to Weight: Axial

7.9 points

Stiffness to Weight: Bending

20 points

Strength to Weight: Axial

22 points

Strength to Weight: Bending

21 points

Thermal Shock Resistance

20 points

Alloy Composition

Among wrought copper alloys, the composition of C77600 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) 42 to 45
Zinc (Zn) 39.7 to 46
Nickel (Ni) 12 to 14
Manganese (Mn) 0 to 0.25
Lead (Pb) 0 to 0.25
Iron (Fe) 0 to 0.2
Tin (Sn) 0 to 0.15
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