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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.

Copper (Cu) 43.5 to 46.5
Zinc (Zn) 38.3 to 45.2
Nickel (Ni) 9.0 to 11
Manganese (Mn) 1.5 to 2.5
Lead (Pb) 0.8 to 1.2
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