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UNS C75400 Nickel Silver

C75400 nickel silver is a copper-nickel alloy formulated for primary forming into wrought products. It can have the lowest ductility among the wrought copper-nickels in the database.

The properties of C75400 nickel silver include eight common variations. This page shows summary ranges across all of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare C75400 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

120 GPa 17 x 106 psi

Elongation at Break

2.0 to 43 %

Poisson's Ratio

0.32

Rockwell B Hardness

60 to 90

Rockwell Superficial 30T Hardness

27 to 77

Shear Modulus

46 GPa 6.6 x 106 psi

Shear Strength

250 to 370 MPa 37 to 54 x 103 psi

Tensile Strength: Ultimate (UTS)

370 to 630 MPa 53 to 92 x 103 psi

Tensile Strength: Yield (Proof)

130 to 590 MPa 20 to 86 x 103 psi

Thermal Properties

Latent Heat of Fusion

200 J/g

Maximum Temperature: Mechanical

190 °C 370 °F

Melting Completion (Liquidus)

1080 °C 1970 °F

Melting Onset (Solidus)

1040 °C 1900 °F

Specific Heat Capacity

390 J/kg-K 0.094 BTU/lb-°F

Thermal Conductivity

36 W/m-K 21 BTU/h-ft-°F

Thermal Expansion

18 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

7.0 % IACS

Electrical Conductivity: Equal Weight (Specific)

7.4 % IACS

Otherwise Unclassified Properties

Base Metal Price

32 % relative

Density

8.5 g/cm3 530 lb/ft3

Embodied Carbon

3.8 kg CO2/kg material

Embodied Energy

59 MJ/kg 25 x 103 BTU/lb

Embodied Water

300 L/kg 36 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

12 to 120 MJ/m3

Resilience: Unit (Modulus of Resilience)

75 to 1450 kJ/m3

Stiffness to Weight: Axial

7.9 points

Stiffness to Weight: Bending

19 points

Strength to Weight: Axial

12 to 21 points

Strength to Weight: Bending

13 to 19 points

Thermal Diffusivity

11 mm2/s

Thermal Shock Resistance

12 to 21 points

Alloy Composition

Among wrought copper alloys, the composition of C75400 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) 63.5 to 66.5
Zinc (Zn) 16.2 to 22.5
Nickel (Ni) 14 to 16
Manganese (Mn) 0 to 0.5
Iron (Fe) 0 to 0.25
Lead (Pb) 0 to 0.1
Residuals 0 to 0.5

All values are % weight. Ranges represent what is permitted under applicable standards.

Followup Questions

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