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7175 Aluminum vs. C99300 Copper

7175 aluminum belongs to the aluminum alloys classification, while C99300 copper belongs to the copper alloys. There are 28 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 7175 aluminum and the bottom bar is C99300 copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
120
Elongation at Break, % 3.8 to 5.9
2.0
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 26
46
Tensile Strength: Ultimate (UTS), MPa 520 to 570
660
Tensile Strength: Yield (Proof), MPa 430 to 490
380

Thermal Properties

Latent Heat of Fusion, J/g 380
240
Maximum Temperature: Mechanical, °C 180
250
Melting Completion (Liquidus), °C 640
1080
Melting Onset (Solidus), °C 480
1070
Specific Heat Capacity, J/kg-K 870
450
Thermal Conductivity, W/m-K 140
43
Thermal Expansion, µm/m-K 23
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 33
9.0
Electrical Conductivity: Equal Weight (Specific), % IACS 99
9.8

Otherwise Unclassified Properties

Base Metal Price, % relative 10
35
Density, g/cm3 3.0
8.2
Embodied Carbon, kg CO2/kg material 8.2
4.5
Embodied Energy, MJ/kg 150
70
Embodied Water, L/kg 1130
400

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 18 to 29
11
Resilience: Unit (Modulus of Resilience), kJ/m3 1310 to 1730
590
Stiffness to Weight: Axial, points 13
8.3
Stiffness to Weight: Bending, points 46
20
Strength to Weight: Axial, points 48 to 52
22
Strength to Weight: Bending, points 48 to 51
20
Thermal Diffusivity, mm2/s 53
12
Thermal Shock Resistance, points 23 to 25
22

Alloy Composition

Aluminum (Al), % 88 to 91.4
10.7 to 11.5
Chromium (Cr), % 0.18 to 0.28
0
Cobalt (Co), % 0
1.0 to 2.0
Copper (Cu), % 1.2 to 2.0
68.6 to 74.4
Iron (Fe), % 0 to 0.2
0.4 to 1.0
Lead (Pb), % 0
0 to 0.020
Magnesium (Mg), % 2.1 to 2.9
0
Manganese (Mn), % 0 to 0.1
0
Nickel (Ni), % 0
13.5 to 16.5
Silicon (Si), % 0 to 0.15
0 to 0.020
Tin (Sn), % 0
0 to 0.050
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 5.1 to 6.1
0
Residuals, % 0
0 to 0.3