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2124 Aluminum vs. 5449 Aluminum

Both 2124 aluminum and 5449 aluminum are aluminum alloys. They have a very high 96% of their average alloy composition in common.

For each property being compared, the top bar is 2124 aluminum and the bottom bar is 5449 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
69
Elongation at Break, % 5.7
4.0 to 17
Fatigue Strength, MPa 130
78 to 120
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 27
26
Shear Strength, MPa 280
130 to 190
Tensile Strength: Ultimate (UTS), MPa 490
210 to 330
Tensile Strength: Yield (Proof), MPa 430
91 to 260

Thermal Properties

Latent Heat of Fusion, J/g 390
400
Maximum Temperature: Mechanical, °C 190
190
Melting Completion (Liquidus), °C 640
650
Melting Onset (Solidus), °C 500
590
Specific Heat Capacity, J/kg-K 880
900
Thermal Conductivity, W/m-K 150
140
Thermal Expansion, µm/m-K 23
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 38
35
Electrical Conductivity: Equal Weight (Specific), % IACS 110
110

Otherwise Unclassified Properties

Base Metal Price, % relative 10
9.5
Density, g/cm3 3.0
2.8
Embodied Carbon, kg CO2/kg material 8.2
8.5
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1150
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 27
12 to 29
Resilience: Unit (Modulus of Resilience), kJ/m3 1290
60 to 480
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 46
50
Strength to Weight: Axial, points 45
22 to 33
Strength to Weight: Bending, points 46
29 to 39
Thermal Diffusivity, mm2/s 58
56
Thermal Shock Resistance, points 21
9.4 to 15

Alloy Composition

Aluminum (Al), % 91.3 to 94.7
94.1 to 97.8
Chromium (Cr), % 0 to 0.1
0 to 0.3
Copper (Cu), % 3.8 to 4.9
0 to 0.3
Iron (Fe), % 0 to 0.3
0 to 0.7
Magnesium (Mg), % 1.2 to 1.8
1.6 to 2.6
Manganese (Mn), % 0.3 to 0.9
0.6 to 1.1
Silicon (Si), % 0 to 0.2
0 to 0.4
Titanium (Ti), % 0 to 0.15
0 to 0.1
Zinc (Zn), % 0 to 0.25
0 to 0.3
Residuals, % 0
0 to 0.15