MakeItFrom.com
Menu (ESC)

C71640 Copper-nickel vs. 8021 Aluminum

C71640 copper-nickel belongs to the copper alloys classification, while 8021 aluminum belongs to the aluminum alloys. There are 26 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is C71640 copper-nickel and the bottom bar is 8021 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 140
70
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 52
26
Tensile Strength: Ultimate (UTS), MPa 490 to 630
160
Tensile Strength: Yield (Proof), MPa 190 to 460
130

Thermal Properties

Latent Heat of Fusion, J/g 240
400
Maximum Temperature: Mechanical, °C 260
170
Melting Completion (Liquidus), °C 1180
650
Melting Onset (Solidus), °C 1120
640
Specific Heat Capacity, J/kg-K 410
900
Thermal Conductivity, W/m-K 29
220
Thermal Expansion, µm/m-K 15
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
56
Electrical Conductivity: Equal Weight (Specific), % IACS 7.1
180

Otherwise Unclassified Properties

Base Metal Price, % relative 40
9.0
Density, g/cm3 8.9
2.8
Embodied Carbon, kg CO2/kg material 5.0
8.1
Embodied Energy, MJ/kg 73
150
Embodied Water, L/kg 280
1180

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 750
130
Stiffness to Weight: Axial, points 8.7
14
Stiffness to Weight: Bending, points 20
49
Strength to Weight: Axial, points 15 to 20
16
Strength to Weight: Bending, points 16 to 18
23
Thermal Diffusivity, mm2/s 8.2
88
Thermal Shock Resistance, points 16 to 21
7.0

Alloy Composition

Aluminum (Al), % 0
98 to 98.8
Copper (Cu), % 61.7 to 67.8
0 to 0.050
Iron (Fe), % 1.7 to 2.3
1.2 to 1.7
Lead (Pb), % 0 to 0.050
0
Manganese (Mn), % 1.5 to 2.5
0
Nickel (Ni), % 29 to 32
0
Silicon (Si), % 0
0 to 0.15
Zinc (Zn), % 0 to 1.0
0
Residuals, % 0
0 to 0.15