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.
| Cu | 63.5 to 66.5 | |
| Zn | 16.2 to 22.5 | |
| Ni | 14 to 16 | |
| Mn | 0 to 0.5 | |
| Fe | 0 to 0.25 | |
| Pb | 0 to 0.1 | |
| res. | 0 to 0.5 |
All values are % weight. Ranges represent what is permitted under applicable standards.