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C71640 Copper-nickel vs. C72700 Copper-nickel

Both C71640 copper-nickel and C72700 copper-nickel are copper alloys. They have 75% 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 C72700 copper-nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 140
120
Poisson's Ratio 0.33
0.34
Shear Modulus, GPa 52
44
Tensile Strength: Ultimate (UTS), MPa 490 to 630
460 to 1070
Tensile Strength: Yield (Proof), MPa 190 to 460
580 to 1060

Thermal Properties

Latent Heat of Fusion, J/g 240
210
Maximum Temperature: Mechanical, °C 260
200
Melting Completion (Liquidus), °C 1180
1100
Melting Onset (Solidus), °C 1120
930
Specific Heat Capacity, J/kg-K 410
380
Thermal Conductivity, W/m-K 29
54
Thermal Expansion, µm/m-K 15
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
11
Electrical Conductivity: Equal Weight (Specific), % IACS 7.1
11

Otherwise Unclassified Properties

Base Metal Price, % relative 40
36
Density, g/cm3 8.9
8.8
Embodied Carbon, kg CO2/kg material 5.0
4.0
Embodied Energy, MJ/kg 73
62
Embodied Water, L/kg 280
350

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 750
1420 to 4770
Stiffness to Weight: Axial, points 8.7
7.4
Stiffness to Weight: Bending, points 20
19
Strength to Weight: Axial, points 15 to 20
14 to 34
Strength to Weight: Bending, points 16 to 18
15 to 26
Thermal Diffusivity, mm2/s 8.2
16
Thermal Shock Resistance, points 16 to 21
16 to 38

Alloy Composition


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Copper (Cu), % 61.7 to 67.8
82.1 to 86
Iron (Fe), % 1.7 to 2.3
0 to 0.5
Lead (Pb), % 0 to 0.050
0 to 0.020
Magnesium (Mg), % 0
0 to 0.15
Manganese (Mn), % 1.5 to 2.5
0.050 to 0.3
Nickel (Ni), % 29 to 32
8.5 to 9.5
Niobium (Nb), % 0
0 to 0.1
Tin (Sn), % 0
5.5 to 6.5
Zinc (Zn), % 0 to 1.0
0 to 0.5
Residuals, % 0 to 0.5
0 to 0.3