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2124 Aluminum vs. 5051A Aluminum

Both 2124 aluminum and 5051A 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 2124 aluminum and the bottom bar is 5051A aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Electrical Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

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