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C72200 Copper-nickel vs. C78200 Nickel Silver

Both C72200 copper-nickel and C78200 nickel silver are copper alloys. They have 74% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is C72200 copper-nickel and the bottom bar is C78200 nickel silver.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 130
110
Poisson's Ratio 0.33
0.32
Rockwell B Hardness 71 to 86
65 to 90
Rockwell Superficial 30T Hardness 64 to 75
63 to 75
Shear Modulus, GPa 48
43
Tensile Strength: Ultimate (UTS), MPa 350 to 580
370 to 630

Thermal Properties

Latent Heat of Fusion, J/g 220
190
Maximum Temperature: Mechanical, °C 230
160
Melting Completion (Liquidus), °C 1180
1000
Melting Onset (Solidus), °C 1120
970
Specific Heat Capacity, J/kg-K 400
390
Thermal Conductivity, W/m-K 34
48
Thermal Expansion, µm/m-K 16
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 6.5
11
Electrical Conductivity: Equal Weight (Specific), % IACS 6.6
12

Otherwise Unclassified Properties

Base Metal Price, % relative 36
28
Density, g/cm3 8.9
8.4
Embodied Carbon, kg CO2/kg material 3.9
3.3
Embodied Energy, MJ/kg 59
52
Embodied Water, L/kg 300
310

Common Calculations

Stiffness to Weight: Axial, points 8.0
7.4
Stiffness to Weight: Bending, points 19
19
Strength to Weight: Axial, points 11 to 18
12 to 21
Strength to Weight: Bending, points 12 to 17
14 to 19
Thermal Diffusivity, mm2/s 9.6
15
Thermal Shock Resistance, points 12 to 20
12 to 21

Alloy Composition

Chromium (Cr), % 0.3 to 0.7
0
Copper (Cu), % 78.1 to 84.2
63 to 67
Iron (Fe), % 0.5 to 1.0
0 to 0.35
Lead (Pb), % 0 to 0.050
1.5 to 2.5
Manganese (Mn), % 0 to 1.0
0 to 0.5
Nickel (Ni), % 15 to 18
7.0 to 9.0
Zinc (Zn), % 0 to 1.0
20.2 to 28.5
Residuals, % 0
0 to 0.5

Comparable Variants