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4145 Aluminum vs. 5449 Aluminum

Both 4145 aluminum and 5449 aluminum are aluminum alloys. They have 86% 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 4145 aluminum and the bottom bar is 5449 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 73
69
Elongation at Break, % 2.2
4.0 to 17
Fatigue Strength, MPa 48
78 to 120
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 28
26
Shear Strength, MPa 69
130 to 190
Tensile Strength: Ultimate (UTS), MPa 120
210 to 330
Tensile Strength: Yield (Proof), MPa 68
91 to 260

Thermal Properties

Latent Heat of Fusion, J/g 540
400
Maximum Temperature: Mechanical, °C 160
190
Melting Completion (Liquidus), °C 590
650
Melting Onset (Solidus), °C 520
590
Specific Heat Capacity, J/kg-K 880
900
Thermal Conductivity, W/m-K 100
140
Thermal Expansion, µm/m-K 21
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 26
35
Electrical Conductivity: Equal Weight (Specific), % IACS 84
110

Otherwise Unclassified Properties

Base Metal Price, % relative 10
9.5
Density, g/cm3 2.8
2.8
Embodied Carbon, kg CO2/kg material 7.6
8.5
Embodied Energy, MJ/kg 140
150
Embodied Water, L/kg 1040
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.3
12 to 29
Resilience: Unit (Modulus of Resilience), kJ/m3 31
60 to 480
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
50
Strength to Weight: Axial, points 12
22 to 33
Strength to Weight: Bending, points 19
29 to 39
Thermal Diffusivity, mm2/s 42
56
Thermal Shock Resistance, points 5.5
9.4 to 15

Alloy Composition


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Aluminum (Al), % 83 to 87.4
94.1 to 97.8
Chromium (Cr), % 0 to 0.15
0 to 0.3
Copper (Cu), % 3.3 to 4.7
0 to 0.3
Iron (Fe), % 0 to 0.8
0 to 0.7
Magnesium (Mg), % 0 to 0.15
1.6 to 2.6
Manganese (Mn), % 0 to 0.15
0.6 to 1.1
Silicon (Si), % 9.3 to 10.7
0 to 0.4
Titanium (Ti), % 0
0 to 0.1
Zinc (Zn), % 0 to 0.2
0 to 0.3
Residuals, % 0 to 0.15
0 to 0.15