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.
| Cu | 42 to 45 | |
| Zn | 39.7 to 46 | |
| Ni | 12 to 14 | |
| Mn | 0 to 0.25 | |
| Pb | 0 to 0.25 | |
| Fe | 0 to 0.2 | |
| Sn | 0 to 0.15 | |
| res. | 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