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7178 Aluminum vs. C72150 Copper-nickel

7178 aluminum belongs to the aluminum alloys classification, while C72150 copper-nickel belongs to the copper alloys. There are 29 material properties with values for both materials. Properties with values for just one material (2, 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 7178 aluminum and the bottom bar is C72150 copper-nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
150
Elongation at Break, % 4.5 to 12
29
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 27
55
Shear Strength, MPa 140 to 380
320
Tensile Strength: Ultimate (UTS), MPa 240 to 640
490
Tensile Strength: Yield (Proof), MPa 120 to 560
210

Thermal Properties

Latent Heat of Fusion, J/g 370
250
Maximum Temperature: Mechanical, °C 180
600
Melting Completion (Liquidus), °C 630
1210
Melting Onset (Solidus), °C 480
1250
Specific Heat Capacity, J/kg-K 860
410
Thermal Conductivity, W/m-K 130
22
Thermal Expansion, µm/m-K 23
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 31
3.5
Electrical Conductivity: Equal Weight (Specific), % IACS 91
3.6

Otherwise Unclassified Properties

Base Metal Price, % relative 10
45
Density, g/cm3 3.1
8.9
Embodied Carbon, kg CO2/kg material 8.2
6.1
Embodied Energy, MJ/kg 150
88
Embodied Water, L/kg 1110
270

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 24 to 52
120
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 2220
150
Stiffness to Weight: Axial, points 13
9.1
Stiffness to Weight: Bending, points 45
20
Strength to Weight: Axial, points 21 to 58
15
Strength to Weight: Bending, points 28 to 54
15
Thermal Diffusivity, mm2/s 47
6.0
Thermal Shock Resistance, points 10 to 28
18

Alloy Composition

Aluminum (Al), % 85.4 to 89.5
0
Carbon (C), % 0
0 to 0.1
Chromium (Cr), % 0.18 to 0.28
0
Copper (Cu), % 1.6 to 2.4
52.5 to 57
Iron (Fe), % 0 to 0.5
0 to 0.1
Lead (Pb), % 0
0 to 0.050
Magnesium (Mg), % 2.4 to 3.1
0
Manganese (Mn), % 0 to 0.3
0 to 0.050
Nickel (Ni), % 0
43 to 46
Silicon (Si), % 0 to 0.4
0 to 0.5
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 6.3 to 7.3
0 to 0.2
Residuals, % 0
0 to 0.5