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7050 Aluminum vs. 7178 Aluminum

Both 7050 aluminum and 7178 aluminum are aluminum alloys. They have a very high 98% of their average alloy composition in common.

For each property being compared, the top bar is 7050 aluminum and the bottom bar is 7178 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
71
Elongation at Break, % 2.2 to 12
4.5 to 12
Fatigue Strength, MPa 130 to 210
120 to 210
Poisson's Ratio 0.32
0.32
Shear Modulus, GPa 26
27
Shear Strength, MPa 280 to 330
140 to 380
Tensile Strength: Ultimate (UTS), MPa 490 to 570
240 to 640
Tensile Strength: Yield (Proof), MPa 390 to 500
120 to 560

Thermal Properties

Latent Heat of Fusion, J/g 370
370
Maximum Temperature: Mechanical, °C 190
180
Melting Completion (Liquidus), °C 630
630
Melting Onset (Solidus), °C 490
480
Specific Heat Capacity, J/kg-K 860
860
Thermal Conductivity, W/m-K 140
130
Thermal Expansion, µm/m-K 24
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 35
31
Electrical Conductivity: Equal Weight (Specific), % IACS 100
91

Otherwise Unclassified Properties

Base Metal Price, % relative 10
10
Density, g/cm3 3.1
3.1
Embodied Carbon, kg CO2/kg material 8.2
8.2
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1120
1110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 10 to 55
24 to 52
Resilience: Unit (Modulus of Resilience), kJ/m3 1110 to 1760
110 to 2220
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 45
45
Strength to Weight: Axial, points 45 to 51
21 to 58
Strength to Weight: Bending, points 45 to 50
28 to 54
Thermal Diffusivity, mm2/s 54
47
Thermal Shock Resistance, points 21 to 25
10 to 28

Alloy Composition

Aluminum (Al), % 87.3 to 92.1
85.4 to 89.5
Chromium (Cr), % 0 to 0.040
0.18 to 0.28
Copper (Cu), % 2.0 to 2.6
1.6 to 2.4
Iron (Fe), % 0 to 0.15
0 to 0.5
Magnesium (Mg), % 1.9 to 2.6
2.4 to 3.1
Manganese (Mn), % 0 to 0.1
0 to 0.3
Silicon (Si), % 0 to 0.12
0 to 0.4
Titanium (Ti), % 0 to 0.060
0 to 0.2
Zinc (Zn), % 5.7 to 6.7
6.3 to 7.3
Zirconium (Zr), % 0.080 to 0.15
0
Residuals, % 0
0 to 0.15

Comparable Variants