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5082 Aluminum vs. 2218 Aluminum

Both 5082 aluminum and 2218 aluminum are aluminum alloys. They have a moderately high 93% 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 5082 aluminum and the bottom bar is 2218 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 67
73
Elongation at Break, % 1.1
6.8 to 10
Fatigue Strength, MPa 110 to 130
110
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 25
27
Shear Strength, MPa 210 to 230
210 to 250
Tensile Strength: Ultimate (UTS), MPa 380 to 400
330 to 430
Tensile Strength: Yield (Proof), MPa 300 to 340
260 to 310

Thermal Properties

Latent Heat of Fusion, J/g 400
390
Maximum Temperature: Mechanical, °C 180
220
Melting Completion (Liquidus), °C 640
640
Melting Onset (Solidus), °C 560
510
Specific Heat Capacity, J/kg-K 910
870
Thermal Conductivity, W/m-K 130
140
Thermal Expansion, µm/m-K 24
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 32
37
Electrical Conductivity: Equal Weight (Specific), % IACS 110
110

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
11
Density, g/cm3 2.7
3.1
Embodied Carbon, kg CO2/kg material 8.9
8.2
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1180
1130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.0 to 4.3
27 to 31
Resilience: Unit (Modulus of Resilience), kJ/m3 670 to 870
450 to 650
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 51
45
Strength to Weight: Axial, points 39 to 41
30 to 39
Strength to Weight: Bending, points 43 to 45
34 to 41
Thermal Diffusivity, mm2/s 54
52
Thermal Shock Resistance, points 17 to 18
15 to 19

Alloy Composition

Aluminum (Al), % 93.5 to 96
88.8 to 93.6
Chromium (Cr), % 0 to 0.15
0 to 0.1
Copper (Cu), % 0 to 0.15
3.5 to 4.5
Iron (Fe), % 0 to 0.35
0 to 1.0
Magnesium (Mg), % 4.0 to 5.0
1.2 to 1.8
Manganese (Mn), % 0 to 0.15
0 to 0.2
Nickel (Ni), % 0
1.7 to 2.3
Silicon (Si), % 0 to 0.2
0 to 0.9
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.25
0 to 0.25
Residuals, % 0
0 to 0.15