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7178 Aluminum vs. C15900 Copper

7178 aluminum belongs to the aluminum alloys classification, while C15900 copper 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 C15900 copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
110
Elongation at Break, % 4.5 to 12
6.5
Poisson's Ratio 0.32
0.34
Shear Modulus, GPa 27
43
Shear Strength, MPa 140 to 380
420
Tensile Strength: Ultimate (UTS), MPa 240 to 640
720
Tensile Strength: Yield (Proof), MPa 120 to 560
240

Thermal Properties

Latent Heat of Fusion, J/g 370
210
Maximum Temperature: Mechanical, °C 180
200
Melting Completion (Liquidus), °C 630
1080
Melting Onset (Solidus), °C 480
1030
Specific Heat Capacity, J/kg-K 860
390
Thermal Conductivity, W/m-K 130
280
Thermal Expansion, µm/m-K 23
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 31
48
Electrical Conductivity: Equal Weight (Specific), % IACS 91
49

Otherwise Unclassified Properties

Base Metal Price, % relative 10
30
Density, g/cm3 3.1
8.8
Embodied Carbon, kg CO2/kg material 8.2
2.8
Embodied Energy, MJ/kg 150
45
Embodied Water, L/kg 1110
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 24 to 52
37
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 2220
260
Stiffness to Weight: Axial, points 13
7.2
Stiffness to Weight: Bending, points 45
18
Strength to Weight: Axial, points 21 to 58
23
Strength to Weight: Bending, points 28 to 54
20
Thermal Diffusivity, mm2/s 47
80
Thermal Shock Resistance, points 10 to 28
26

Alloy Composition

Aluminum (Al), % 85.4 to 89.5
0.76 to 0.84
Carbon (C), % 0
0.27 to 0.33
Chromium (Cr), % 0.18 to 0.28
0
Copper (Cu), % 1.6 to 2.4
97.5 to 97.9
Iron (Fe), % 0 to 0.5
0 to 0.040
Magnesium (Mg), % 2.4 to 3.1
0
Manganese (Mn), % 0 to 0.3
0
Oxygen (O), % 0
0.4 to 0.54
Silicon (Si), % 0 to 0.4
0
Titanium (Ti), % 0 to 0.2
0.66 to 0.74
Zinc (Zn), % 6.3 to 7.3
0
Residuals, % 0 to 0.15
0