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5051A Aluminum vs. 2124 Aluminum

Both 5051A aluminum and 2124 aluminum are aluminum alloys. They have a very high 95% of their average alloy composition in common.

For each property being compared, the top bar is 5051A aluminum and the bottom bar is 2124 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 68
71
Elongation at Break, % 18 to 21
5.7
Fatigue Strength, MPa 51 to 61
130
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 26
27
Shear Strength, MPa 110
280
Tensile Strength: Ultimate (UTS), MPa 170
490
Tensile Strength: Yield (Proof), MPa 56
430

Thermal Properties

Latent Heat of Fusion, J/g 400
390
Maximum Temperature: Mechanical, °C 190
190
Melting Completion (Liquidus), °C 640
640
Melting Onset (Solidus), °C 610
500
Specific Heat Capacity, J/kg-K 900
880
Thermal Conductivity, W/m-K 150
150
Thermal Expansion, µm/m-K 23
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 39
38
Electrical Conductivity: Equal Weight (Specific), % IACS 130
110

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
10
Density, g/cm3 2.7
3.0
Embodied Carbon, kg CO2/kg material 8.5
8.2
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1190
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 24 to 27
27
Resilience: Unit (Modulus of Resilience), kJ/m3 23
1290
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 50
46
Strength to Weight: Axial, points 17 to 18
45
Strength to Weight: Bending, points 25
46
Thermal Diffusivity, mm2/s 63
58
Thermal Shock Resistance, points 7.6
21

Alloy Composition

Aluminum (Al), % 96.1 to 98.6
91.3 to 94.7
Chromium (Cr), % 0 to 0.3
0 to 0.1
Copper (Cu), % 0 to 0.050
3.8 to 4.9
Iron (Fe), % 0 to 0.45
0 to 0.3
Magnesium (Mg), % 1.4 to 2.1
1.2 to 1.8
Manganese (Mn), % 0 to 0.25
0.3 to 0.9
Silicon (Si), % 0 to 0.3
0 to 0.2
Titanium (Ti), % 0 to 0.1
0 to 0.15
Zinc (Zn), % 0 to 0.2
0 to 0.25
Residuals, % 0
0 to 0.15