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238.0 Aluminum vs. 7178 Aluminum

Both 238.0 aluminum and 7178 aluminum are aluminum alloys. They have 87% of their average alloy composition in common. There are 29 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 238.0 aluminum and the bottom bar is 7178 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 76
71
Elongation at Break, % 1.5
4.5 to 12
Fatigue Strength, MPa 110
120 to 210
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 28
27
Tensile Strength: Ultimate (UTS), MPa 210
240 to 640
Tensile Strength: Yield (Proof), MPa 170
120 to 560

Thermal Properties

Latent Heat of Fusion, J/g 430
370
Maximum Temperature: Mechanical, °C 170
180
Melting Completion (Liquidus), °C 600
630
Melting Onset (Solidus), °C 510
480
Specific Heat Capacity, J/kg-K 840
860
Thermal Conductivity, W/m-K 100
130
Thermal Expansion, µm/m-K 21
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
31
Electrical Conductivity: Equal Weight (Specific), % IACS 67
91

Otherwise Unclassified Properties

Base Metal Price, % relative 12
10
Density, g/cm3 3.4
3.1
Embodied Carbon, kg CO2/kg material 7.4
8.2
Embodied Energy, MJ/kg 140
150
Embodied Water, L/kg 1040
1110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.9
24 to 52
Resilience: Unit (Modulus of Resilience), kJ/m3 180
110 to 2220
Stiffness to Weight: Axial, points 12
13
Stiffness to Weight: Bending, points 42
45
Strength to Weight: Axial, points 17
21 to 58
Strength to Weight: Bending, points 23
28 to 54
Thermal Diffusivity, mm2/s 37
47
Thermal Shock Resistance, points 9.1
10 to 28

Alloy Composition


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Aluminum (Al), % 81.9 to 84.9
85.4 to 89.5
Chromium (Cr), % 0
0.18 to 0.28
Copper (Cu), % 9.5 to 10.5
1.6 to 2.4
Iron (Fe), % 1.0 to 1.5
0 to 0.5
Magnesium (Mg), % 0 to 0.25
2.4 to 3.1
Manganese (Mn), % 0
0 to 0.3
Silicon (Si), % 3.6 to 4.4
0 to 0.4
Titanium (Ti), % 0
0 to 0.2
Zinc (Zn), % 1.0 to 1.5
6.3 to 7.3
Residuals, % 0
0 to 0.15