UNS C79600 Leaded Nickel Silver
C79600 nickel silver is a copper-nickel alloy formulated for primary forming into wrought products. Cited properties are appropriate for the H04 (full hard) temper.
It has a moderately low base cost among wrought copper-nickels. In addition, it has a moderately low melting temperature and a moderately low tensile strength.
The graph bars on the material properties cards below compare C79600 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
15 %
Poisson's Ratio
0.3
Rockwell B Hardness
70
Shear Modulus
43 GPa 6.2 x 106 psi
Shear Strength
290 MPa 43 x 103 psi
Tensile Strength: Ultimate (UTS)
480 MPa 70 x 103 psi
Tensile Strength: Yield (Proof)
300 MPa 43 x 103 psi
Thermal Properties
Latent Heat of Fusion
180 J/g
Maximum Temperature: Mechanical
130 °C 270 °F
Melting Completion (Liquidus)
930 °C 1700 °F
Melting Onset (Solidus)
880 °C 1620 °F
Specific Heat Capacity
390 J/kg-K 0.093 BTU/lb-°F
Thermal Conductivity
36 W/m-K 21 BTU/h-ft-°F
Thermal Expansion
21 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
7.0 % IACS
Electrical Conductivity: Equal Weight (Specific)
8.0 % IACS
Otherwise Unclassified Properties
Base Metal Price
25 % relative
Density
7.9 g/cm3 490 lb/ft3
Embodied Carbon
3.5 kg CO2/kg material
Embodied Energy
57 MJ/kg 24 x 103 BTU/lb
Embodied Water
310 L/kg 38 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
63 MJ/m3
Resilience: Unit (Modulus of Resilience)
400 kJ/m3
Stiffness to Weight: Axial
7.8 points
Stiffness to Weight: Bending
20 points
Strength to Weight: Axial
17 points
Strength to Weight: Bending
17 points
Thermal Diffusivity
12 mm2/s
Thermal Shock Resistance
15 points
Alloy Composition
Among wrought copper alloys, the composition of C79600 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 | 43.5 to 46.5 | |
| Zn | 38.3 to 45.2 | |
| Ni | 9.0 to 11 | |
| Mn | 1.5 to 2.5 | |
| Pb | 0.8 to 1.2 | |
| 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