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C71640 Copper-nickel vs. C74400 Nickel Silver

Both C71640 copper-nickel and C74400 nickel silver are copper alloys. They have 68% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is C71640 copper-nickel and the bottom bar is C74400 nickel silver.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 140
110
Poisson's Ratio 0.33
0.31
Shear Modulus, GPa 52
39
Tensile Strength: Ultimate (UTS), MPa 490 to 630
350
Tensile Strength: Yield (Proof), MPa 190 to 460
120

Thermal Properties

Latent Heat of Fusion, J/g 240
180
Maximum Temperature: Mechanical, °C 260
140
Melting Completion (Liquidus), °C 1180
930
Melting Onset (Solidus), °C 1120
910
Specific Heat Capacity, J/kg-K 410
390
Thermal Conductivity, W/m-K 29
120
Thermal Expansion, µm/m-K 15
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
26
Electrical Conductivity: Equal Weight (Specific), % IACS 7.1
29

Otherwise Unclassified Properties

Base Metal Price, % relative 40
25
Density, g/cm3 8.9
8.2
Embodied Carbon, kg CO2/kg material 5.0
2.9
Embodied Energy, MJ/kg 73
48
Embodied Water, L/kg 280
320

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 750
63
Stiffness to Weight: Axial, points 8.7
7.4
Stiffness to Weight: Bending, points 20
19
Strength to Weight: Axial, points 15 to 20
12
Strength to Weight: Bending, points 16 to 18
14
Thermal Diffusivity, mm2/s 8.2
37
Thermal Shock Resistance, points 16 to 21
12

Alloy Composition


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Copper (Cu), % 61.7 to 67.8
62 to 66
Iron (Fe), % 1.7 to 2.3
0 to 0.050
Lead (Pb), % 0 to 0.050
0 to 0.050
Manganese (Mn), % 1.5 to 2.5
0
Nickel (Ni), % 29 to 32
2.0 to 4.0
Zinc (Zn), % 0 to 1.0
29.6 to 36
Residuals, % 0 to 0.5
0 to 0.3