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5070 Aluminum vs. 7178 Aluminum

Both 5070 aluminum and 7178 aluminum are aluminum alloys. They have a moderately high 92% of their average alloy composition in common.

For each property being compared, the top bar is 5070 aluminum and the bottom bar is 7178 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 68
71
Elongation at Break, % 20
4.5 to 12
Fatigue Strength, MPa 150
120 to 210
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 26
27
Shear Strength, MPa 190
140 to 380
Tensile Strength: Ultimate (UTS), MPa 300
240 to 640
Tensile Strength: Yield (Proof), MPa 140
120 to 560

Thermal Properties

Latent Heat of Fusion, J/g 390
370
Maximum Temperature: Mechanical, °C 190
180
Melting Completion (Liquidus), °C 640
630
Melting Onset (Solidus), °C 550
480
Specific Heat Capacity, J/kg-K 900
860
Thermal Conductivity, W/m-K 130
130
Thermal Expansion, µm/m-K 24
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 31
31
Electrical Conductivity: Equal Weight (Specific), % IACS 100
91

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
10
Density, g/cm3 2.7
3.1
Embodied Carbon, kg CO2/kg material 8.8
8.2
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1170
1110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 51
24 to 52
Resilience: Unit (Modulus of Resilience), kJ/m3 150
110 to 2220
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 50
45
Strength to Weight: Axial, points 31
21 to 58
Strength to Weight: Bending, points 37
28 to 54
Thermal Diffusivity, mm2/s 53
47
Thermal Shock Resistance, points 14
10 to 28

Alloy Composition

Aluminum (Al), % 92.4 to 95.7
85.4 to 89.5
Chromium (Cr), % 0 to 0.3
0.18 to 0.28
Copper (Cu), % 0 to 0.25
1.6 to 2.4
Iron (Fe), % 0 to 0.4
0 to 0.5
Magnesium (Mg), % 3.5 to 4.5
2.4 to 3.1
Manganese (Mn), % 0.4 to 0.8
0 to 0.3
Silicon (Si), % 0 to 0.25
0 to 0.4
Titanium (Ti), % 0 to 0.15
0 to 0.2
Zinc (Zn), % 0.4 to 0.8
6.3 to 7.3
Residuals, % 0 to 0.15
0 to 0.15