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712.0 Aluminum vs. 7178 Aluminum

Both 712.0 aluminum and 7178 aluminum are aluminum alloys. They have a moderately high 95% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is 712.0 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, % 4.5 to 4.7
4.5 to 12
Fatigue Strength, MPa 140 to 180
120 to 210
Poisson's Ratio 0.32
0.32
Shear Modulus, GPa 27
27
Shear Strength, MPa 180
140 to 380
Tensile Strength: Ultimate (UTS), MPa 250 to 260
240 to 640
Tensile Strength: Yield (Proof), MPa 180 to 200
120 to 560

Thermal Properties

Latent Heat of Fusion, J/g 380
370
Maximum Temperature: Mechanical, °C 190
180
Melting Completion (Liquidus), °C 640
630
Melting Onset (Solidus), °C 610
480
Specific Heat Capacity, J/kg-K 870
860
Thermal Conductivity, W/m-K 160
130
Thermal Expansion, µm/m-K 24
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 9.5
10
Density, g/cm3 3.0
3.1
Embodied Carbon, kg CO2/kg material 8.0
8.2
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1140
1110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
24 to 52
Resilience: Unit (Modulus of Resilience), kJ/m3 240 to 270
110 to 2220
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 46
45
Strength to Weight: Axial, points 24 to 25
21 to 58
Strength to Weight: Bending, points 30 to 31
28 to 54
Thermal Diffusivity, mm2/s 62
47
Thermal Shock Resistance, points 11
10 to 28

Alloy Composition

Aluminum (Al), % 90.7 to 94
85.4 to 89.5
Chromium (Cr), % 0.4 to 0.6
0.18 to 0.28
Copper (Cu), % 0 to 0.25
1.6 to 2.4
Iron (Fe), % 0 to 0.5
0 to 0.5
Magnesium (Mg), % 0.5 to 0.65
2.4 to 3.1
Manganese (Mn), % 0 to 0.1
0 to 0.3
Silicon (Si), % 0 to 0.3
0 to 0.4
Titanium (Ti), % 0.15 to 0.25
0 to 0.2
Zinc (Zn), % 5.0 to 6.5
6.3 to 7.3
Residuals, % 0
0 to 0.15