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4145 Aluminum vs. C99300 Copper

4145 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 (4, 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 4145 aluminum and the bottom bar is C99300 copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 73
120
Elongation at Break, % 2.2
2.0
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 28
46
Tensile Strength: Ultimate (UTS), MPa 120
660
Tensile Strength: Yield (Proof), MPa 68
380

Thermal Properties

Latent Heat of Fusion, J/g 540
240
Maximum Temperature: Mechanical, °C 160
250
Melting Completion (Liquidus), °C 590
1080
Melting Onset (Solidus), °C 520
1070
Specific Heat Capacity, J/kg-K 880
450
Thermal Conductivity, W/m-K 100
43
Thermal Expansion, µm/m-K 21
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 26
9.0
Electrical Conductivity: Equal Weight (Specific), % IACS 84
9.8

Otherwise Unclassified Properties

Base Metal Price, % relative 10
35
Density, g/cm3 2.8
8.2
Embodied Carbon, kg CO2/kg material 7.6
4.5
Embodied Energy, MJ/kg 140
70
Embodied Water, L/kg 1040
400

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.3
11
Resilience: Unit (Modulus of Resilience), kJ/m3 31
590
Stiffness to Weight: Axial, points 14
8.3
Stiffness to Weight: Bending, points 50
20
Strength to Weight: Axial, points 12
22
Strength to Weight: Bending, points 19
20
Thermal Diffusivity, mm2/s 42
12
Thermal Shock Resistance, points 5.5
22

Alloy Composition

Aluminum (Al), % 83 to 87.4
10.7 to 11.5
Chromium (Cr), % 0 to 0.15
0
Cobalt (Co), % 0
1.0 to 2.0
Copper (Cu), % 3.3 to 4.7
68.6 to 74.4
Iron (Fe), % 0 to 0.8
0.4 to 1.0
Lead (Pb), % 0
0 to 0.020
Magnesium (Mg), % 0 to 0.15
0
Manganese (Mn), % 0 to 0.15
0
Nickel (Ni), % 0
13.5 to 16.5
Silicon (Si), % 9.3 to 10.7
0 to 0.020
Tin (Sn), % 0
0 to 0.050
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0
0 to 0.3