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7108A Aluminum vs. 4145 Aluminum

Both 7108A aluminum and 4145 aluminum are aluminum alloys. They have 86% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is 7108A aluminum and the bottom bar is 4145 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
73
Elongation at Break, % 11 to 13
2.2
Fatigue Strength, MPa 120 to 130
48
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 26
28
Shear Strength, MPa 210
69
Tensile Strength: Ultimate (UTS), MPa 350
120
Tensile Strength: Yield (Proof), MPa 290 to 300
68

Thermal Properties

Latent Heat of Fusion, J/g 380
540
Maximum Temperature: Mechanical, °C 210
160
Melting Completion (Liquidus), °C 630
590
Melting Onset (Solidus), °C 520
520
Specific Heat Capacity, J/kg-K 870
880
Thermal Conductivity, W/m-K 150
100
Thermal Expansion, µm/m-K 24
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 36
26
Electrical Conductivity: Equal Weight (Specific), % IACS 110
84

Otherwise Unclassified Properties

Base Metal Price, % relative 10
10
Density, g/cm3 2.9
2.8
Embodied Carbon, kg CO2/kg material 8.3
7.6
Embodied Energy, MJ/kg 150
140
Embodied Water, L/kg 1150
1040

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 38 to 44
2.3
Resilience: Unit (Modulus of Resilience), kJ/m3 610 to 640
31
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 47
50
Strength to Weight: Axial, points 33 to 34
12
Strength to Weight: Bending, points 38
19
Thermal Diffusivity, mm2/s 59
42
Thermal Shock Resistance, points 15 to 16
5.5

Alloy Composition

Aluminum (Al), % 91.6 to 94.4
83 to 87.4
Chromium (Cr), % 0 to 0.040
0 to 0.15
Copper (Cu), % 0 to 0.050
3.3 to 4.7
Gallium (Ga), % 0 to 0.030
0
Iron (Fe), % 0 to 0.3
0 to 0.8
Magnesium (Mg), % 0.7 to 1.5
0 to 0.15
Manganese (Mn), % 0 to 0.050
0 to 0.15
Silicon (Si), % 0 to 0.2
9.3 to 10.7
Titanium (Ti), % 0 to 0.030
0
Zinc (Zn), % 4.8 to 5.8
0 to 0.2
Zirconium (Zr), % 0.15 to 0.25
0
Residuals, % 0
0 to 0.15