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4047 Aluminum vs. 7178 Aluminum

Both 4047 aluminum and 7178 aluminum are aluminum alloys. They have 88% 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 4047 aluminum and the bottom bar is 7178 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 72
71
Elongation at Break, % 3.4
4.5 to 12
Fatigue Strength, MPa 45
120 to 210
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 27
27
Shear Strength, MPa 69
140 to 380
Tensile Strength: Ultimate (UTS), MPa 120
240 to 640
Tensile Strength: Yield (Proof), MPa 64
120 to 560

Thermal Properties

Latent Heat of Fusion, J/g 570
370
Maximum Temperature: Mechanical, °C 160
180
Melting Completion (Liquidus), °C 580
630
Melting Onset (Solidus), °C 580
480
Specific Heat Capacity, J/kg-K 900
860
Thermal Conductivity, W/m-K 130
130
Thermal Expansion, µm/m-K 21
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 33
31
Electrical Conductivity: Equal Weight (Specific), % IACS 120
91

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
10
Density, g/cm3 2.5
3.1
Embodied Carbon, kg CO2/kg material 7.7
8.2
Embodied Energy, MJ/kg 140
150
Embodied Water, L/kg 1050
1110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 3.5
24 to 52
Resilience: Unit (Modulus of Resilience), kJ/m3 28
110 to 2220
Stiffness to Weight: Axial, points 16
13
Stiffness to Weight: Bending, points 55
45
Strength to Weight: Axial, points 13
21 to 58
Strength to Weight: Bending, points 21
28 to 54
Thermal Diffusivity, mm2/s 59
47
Thermal Shock Resistance, points 5.6
10 to 28

Alloy Composition

Aluminum (Al), % 85.3 to 89
85.4 to 89.5
Chromium (Cr), % 0
0.18 to 0.28
Copper (Cu), % 0 to 0.3
1.6 to 2.4
Iron (Fe), % 0 to 0.8
0 to 0.5
Magnesium (Mg), % 0 to 0.1
2.4 to 3.1
Manganese (Mn), % 0 to 0.15
0 to 0.3
Silicon (Si), % 11 to 13
0 to 0.4
Titanium (Ti), % 0
0 to 0.2
Zinc (Zn), % 0 to 0.2
6.3 to 7.3
Residuals, % 0
0 to 0.15