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4004 Aluminum vs. 4047 Aluminum

Both 4004 aluminum and 4047 aluminum are aluminum alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have a very high 98% of their average alloy composition in common.

For each property being compared, the top bar is 4004 aluminum and the bottom bar is 4047 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
72
Elongation at Break, % 2.4
3.4
Fatigue Strength, MPa 42
45
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 27
27
Shear Strength, MPa 63
69
Tensile Strength: Ultimate (UTS), MPa 110
120
Tensile Strength: Yield (Proof), MPa 60
64

Thermal Properties

Brazing Temperature, °C 590 to 600
580 to 600
Latent Heat of Fusion, J/g 540
570
Maximum Temperature: Mechanical, °C 160
160
Melting Completion (Liquidus), °C 600
580
Melting Onset (Solidus), °C 560
580
Specific Heat Capacity, J/kg-K 910
900
Thermal Conductivity, W/m-K 130
130
Thermal Expansion, µm/m-K 22
21

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
2.5
Embodied Carbon, kg CO2/kg material 8.0
7.7
Embodied Energy, MJ/kg 150
140
Embodied Water, L/kg 1070
1050

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.3
3.5
Resilience: Unit (Modulus of Resilience), kJ/m3 25
28
Stiffness to Weight: Axial, points 15
16
Stiffness to Weight: Bending, points 54
55
Strength to Weight: Axial, points 12
13
Strength to Weight: Bending, points 20
21
Thermal Diffusivity, mm2/s 58
59
Thermal Shock Resistance, points 5.1
5.6

Alloy Composition


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Aluminum (Al), % 86 to 90
85.3 to 89
Copper (Cu), % 0 to 0.25
0 to 0.3
Iron (Fe), % 0 to 0.8
0 to 0.8
Magnesium (Mg), % 1.0 to 2.0
0 to 0.1
Manganese (Mn), % 0 to 0.1
0 to 0.15
Silicon (Si), % 9.0 to 10.5
11 to 13
Zinc (Zn), % 0 to 0.2
0 to 0.2
Residuals, % 0 to 0.15
0 to 0.15