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238.0 Aluminum vs. 771.0 Aluminum

Both 238.0 aluminum and 771.0 aluminum are aluminum alloys. They have 85% of their average alloy composition in common. There are 29 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 238.0 aluminum and the bottom bar is 771.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 76
70
Elongation at Break, % 1.5
1.7 to 6.5
Fatigue Strength, MPa 110
92 to 180
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 28
26
Tensile Strength: Ultimate (UTS), MPa 210
250 to 370
Tensile Strength: Yield (Proof), MPa 170
210 to 350

Thermal Properties

Latent Heat of Fusion, J/g 430
380
Maximum Temperature: Mechanical, °C 170
180
Melting Completion (Liquidus), °C 600
630
Melting Onset (Solidus), °C 510
620
Specific Heat Capacity, J/kg-K 840
870
Thermal Conductivity, W/m-K 100
140 to 150
Thermal Expansion, µm/m-K 21
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
27
Electrical Conductivity: Equal Weight (Specific), % IACS 67
82

Otherwise Unclassified Properties

Base Metal Price, % relative 12
9.5
Density, g/cm3 3.4
3.0
Embodied Carbon, kg CO2/kg material 7.4
8.0
Embodied Energy, MJ/kg 140
150
Embodied Water, L/kg 1040
1130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.9
4.4 to 20
Resilience: Unit (Modulus of Resilience), kJ/m3 180
310 to 900
Stiffness to Weight: Axial, points 12
13
Stiffness to Weight: Bending, points 42
46
Strength to Weight: Axial, points 17
23 to 35
Strength to Weight: Bending, points 23
29 to 39
Thermal Diffusivity, mm2/s 37
54 to 58
Thermal Shock Resistance, points 9.1
11 to 16

Alloy Composition


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Aluminum (Al), % 81.9 to 84.9
90.5 to 92.5
Chromium (Cr), % 0
0.060 to 0.2
Copper (Cu), % 9.5 to 10.5
0 to 0.1
Iron (Fe), % 1.0 to 1.5
0 to 0.15
Magnesium (Mg), % 0 to 0.25
0.8 to 1.0
Manganese (Mn), % 0
0 to 0.1
Silicon (Si), % 3.6 to 4.4
0 to 0.15
Titanium (Ti), % 0
0.1 to 0.2
Zinc (Zn), % 1.0 to 1.5
6.5 to 7.5
Residuals, % 0
0 to 0.15