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8090 Aluminum vs. 4045 Aluminum

Both 8090 aluminum and 4045 aluminum are aluminum alloys. They have 90% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is 8090 aluminum and the bottom bar is 4045 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 67
71
Elongation at Break, % 3.5 to 13
2.3
Fatigue Strength, MPa 91 to 140
45
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 25
27
Tensile Strength: Ultimate (UTS), MPa 340 to 490
120
Tensile Strength: Yield (Proof), MPa 210 to 420
64

Thermal Properties

Latent Heat of Fusion, J/g 400
540
Maximum Temperature: Mechanical, °C 190
160
Melting Completion (Liquidus), °C 660
600
Melting Onset (Solidus), °C 600
580
Specific Heat Capacity, J/kg-K 960
900
Thermal Conductivity, W/m-K 95 to 160
170
Thermal Expansion, µm/m-K 24
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 20
45
Electrical Conductivity: Equal Weight (Specific), % IACS 66
160

Otherwise Unclassified Properties

Base Metal Price, % relative 18
9.5
Density, g/cm3 2.7
2.6
Embodied Carbon, kg CO2/kg material 8.6
7.8
Embodied Energy, MJ/kg 170
150
Embodied Water, L/kg 1160
1070

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 16 to 41
2.4
Resilience: Unit (Modulus of Resilience), kJ/m3 340 to 1330
29
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 50
54
Strength to Weight: Axial, points 34 to 49
13
Strength to Weight: Bending, points 39 to 50
21
Thermal Diffusivity, mm2/s 36 to 60
74
Thermal Shock Resistance, points 15 to 22
5.7

Alloy Composition

Aluminum (Al), % 93 to 98.4
87.4 to 91
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 1.0 to 1.6
0 to 0.3
Iron (Fe), % 0 to 0.3
0 to 0.8
Lithium (Li), % 2.2 to 2.7
0
Magnesium (Mg), % 0.6 to 1.3
0 to 0.050
Manganese (Mn), % 0 to 0.1
0 to 0.050
Silicon (Si), % 0 to 0.2
9.0 to 11
Titanium (Ti), % 0 to 0.1
0 to 0.2
Zinc (Zn), % 0 to 0.25
0 to 0.1
Zirconium (Zr), % 0.040 to 0.16
0
Residuals, % 0
0 to 0.15