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5051A Aluminum vs. 2218 Aluminum

Both 5051A 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 5051A aluminum and the bottom bar is 2218 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 68
73
Elongation at Break, % 18 to 21
6.8 to 10
Fatigue Strength, MPa 51 to 61
110
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 26
27
Shear Strength, MPa 110
210 to 250
Tensile Strength: Ultimate (UTS), MPa 170
330 to 430
Tensile Strength: Yield (Proof), MPa 56
260 to 310

Thermal Properties

Latent Heat of Fusion, J/g 400
390
Maximum Temperature: Mechanical, °C 190
220
Melting Completion (Liquidus), °C 640
640
Melting Onset (Solidus), °C 610
510
Specific Heat Capacity, J/kg-K 900
870
Thermal Conductivity, W/m-K 150
140
Thermal Expansion, µm/m-K 23
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 39
37
Electrical Conductivity: Equal Weight (Specific), % IACS 130
110

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
11
Density, g/cm3 2.7
3.1
Embodied Carbon, kg CO2/kg material 8.5
8.2
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1190
1130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 24 to 27
27 to 31
Resilience: Unit (Modulus of Resilience), kJ/m3 23
450 to 650
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 50
45
Strength to Weight: Axial, points 17 to 18
30 to 39
Strength to Weight: Bending, points 25
34 to 41
Thermal Diffusivity, mm2/s 63
52
Thermal Shock Resistance, points 7.6
15 to 19

Alloy Composition

Aluminum (Al), % 96.1 to 98.6
88.8 to 93.6
Chromium (Cr), % 0 to 0.3
0 to 0.1
Copper (Cu), % 0 to 0.050
3.5 to 4.5
Iron (Fe), % 0 to 0.45
0 to 1.0
Magnesium (Mg), % 1.4 to 2.1
1.2 to 1.8
Manganese (Mn), % 0 to 0.25
0 to 0.2
Nickel (Ni), % 0
1.7 to 2.3
Silicon (Si), % 0 to 0.3
0 to 0.9
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.2
0 to 0.25
Residuals, % 0
0 to 0.15