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2014-T6 Aluminum vs. 7178-T6 Aluminum

Both 2014-T6 aluminum and 7178-T6 aluminum are aluminum alloys. Both are furnished in the T6 temper. They have a moderately high 91% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is 2014-T6 aluminum and the bottom bar is 7178-T6 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 72
71
Elongation at Break, % 6.8
8.5
Fatigue Strength, MPa 130
210
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 27
27
Shear Strength, MPa 290
380
Tensile Strength: Ultimate (UTS), MPa 490
640
Tensile Strength: Yield (Proof), MPa 420
550

Thermal Properties

Latent Heat of Fusion, J/g 400
370
Maximum Temperature: Mechanical, °C 210
180
Melting Completion (Liquidus), °C 630
630
Melting Onset (Solidus), °C 510
480
Specific Heat Capacity, J/kg-K 870
860
Thermal Conductivity, W/m-K 150
130
Thermal Expansion, µm/m-K 23
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
31
Electrical Conductivity: Equal Weight (Specific), % IACS 120
91

Otherwise Unclassified Properties

Base Metal Price, % relative 11
10
Density, g/cm3 3.0
3.1
Embodied Carbon, kg CO2/kg material 8.1
8.2
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1130
1110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 32
52
Resilience: Unit (Modulus of Resilience), kJ/m3 1210
2180
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 46
45
Strength to Weight: Axial, points 45
57
Strength to Weight: Bending, points 45
53
Thermal Diffusivity, mm2/s 58
47
Thermal Shock Resistance, points 21
28

Alloy Composition

Aluminum (Al), % 90.4 to 95
85.4 to 89.5
Chromium (Cr), % 0 to 0.1
0.18 to 0.28
Copper (Cu), % 3.9 to 5.0
1.6 to 2.4
Iron (Fe), % 0 to 0.7
0 to 0.5
Magnesium (Mg), % 0.2 to 0.8
2.4 to 3.1
Manganese (Mn), % 0.4 to 1.2
0 to 0.3
Silicon (Si), % 0.5 to 1.2
0 to 0.4
Titanium (Ti), % 0 to 0.15
0 to 0.2
Zinc (Zn), % 0 to 0.25
6.3 to 7.3
Zirconium (Zr), % 0 to 0.2
0
Residuals, % 0
0 to 0.15