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4004 Aluminum vs. 4104 Aluminum

Both 4004 aluminum and 4104 aluminum are aluminum alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. Their average alloy composition is basically identical.

For each property being compared, the top bar is 4004 aluminum and the bottom bar is 4104 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
71
Elongation at Break, % 2.4
2.4
Fatigue Strength, MPa 42
42
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 27
27
Shear Strength, MPa 63
63
Tensile Strength: Ultimate (UTS), MPa 110
110
Tensile Strength: Yield (Proof), MPa 60
60

Thermal Properties

Brazing Temperature, °C 590 to 600
590 to 600
Latent Heat of Fusion, J/g 540
540
Maximum Temperature: Mechanical, °C 160
160
Melting Completion (Liquidus), °C 600
600
Melting Onset (Solidus), °C 560
560
Specific Heat Capacity, J/kg-K 910
900
Thermal Conductivity, W/m-K 130
130
Thermal Expansion, µm/m-K 22
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 33
33
Electrical Conductivity: Equal Weight (Specific), % IACS 120
120

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
9.5
Density, g/cm3 2.6
2.6
Embodied Carbon, kg CO2/kg material 8.0
8.0
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1070
1080

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.3
2.3
Resilience: Unit (Modulus of Resilience), kJ/m3 25
25
Stiffness to Weight: Axial, points 15
15
Stiffness to Weight: Bending, points 54
54
Strength to Weight: Axial, points 12
12
Strength to Weight: Bending, points 20
20
Thermal Diffusivity, mm2/s 58
58
Thermal Shock Resistance, points 5.1
5.1

Alloy Composition


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Aluminum (Al), % 86 to 90
85.8 to 90
Bismuth (Bi), % 0
0.020 to 0.2
Copper (Cu), % 0 to 0.25
0 to 0.25
Iron (Fe), % 0 to 0.8
0 to 0.8
Magnesium (Mg), % 1.0 to 2.0
1.0 to 2.0
Manganese (Mn), % 0 to 0.1
0 to 0.1
Silicon (Si), % 9.0 to 10.5
9.0 to 10.5
Zinc (Zn), % 0 to 0.2
0 to 0.2
Residuals, % 0 to 0.15
0 to 0.15