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7178 Aluminum vs. C14200 Copper

7178 aluminum belongs to the aluminum alloys classification, while C14200 copper belongs to the copper alloys. There are 30 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 7178 aluminum and the bottom bar is C14200 copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
120
Elongation at Break, % 4.5 to 12
8.0 to 45
Fatigue Strength, MPa 120 to 210
76 to 130
Poisson's Ratio 0.32
0.34
Shear Modulus, GPa 27
43
Shear Strength, MPa 140 to 380
150 to 200
Tensile Strength: Ultimate (UTS), MPa 240 to 640
220 to 370
Tensile Strength: Yield (Proof), MPa 120 to 560
75 to 340

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
190
Thermal Expansion, µm/m-K 23
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 31
45
Electrical Conductivity: Equal Weight (Specific), % IACS 91
45

Otherwise Unclassified Properties

Base Metal Price, % relative 10
31
Density, g/cm3 3.1
8.9
Embodied Carbon, kg CO2/kg material 8.2
2.6
Embodied Energy, MJ/kg 150
41
Embodied Water, L/kg 1110
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 24 to 52
29 to 83
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 2220
24 to 500
Stiffness to Weight: Axial, points 13
7.2
Stiffness to Weight: Bending, points 45
18
Strength to Weight: Axial, points 21 to 58
6.8 to 11
Strength to Weight: Bending, points 28 to 54
9.1 to 13
Thermal Diffusivity, mm2/s 47
56
Thermal Shock Resistance, points 10 to 28
7.9 to 13

Alloy Composition

Aluminum (Al), % 85.4 to 89.5
0
Arsenic (As), % 0
0.15 to 0.5
Chromium (Cr), % 0.18 to 0.28
0
Copper (Cu), % 1.6 to 2.4
99.4 to 99.835
Iron (Fe), % 0 to 0.5
0
Magnesium (Mg), % 2.4 to 3.1
0
Manganese (Mn), % 0 to 0.3
0
Phosphorus (P), % 0
0.015 to 0.040
Silicon (Si), % 0 to 0.4
0
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 6.3 to 7.3
0
Residuals, % 0 to 0.15
0