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.
| Cu | 52 to 56 | |
| Zn | 30.6 to 39 | |
| Ni | 9.0 to 12 | |
| Mn | 0 to 0.9 | |
| Pb | 0 to 0.030 | |
| res. | 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