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238.0 Aluminum vs. 851.0 Aluminum

Both 238.0 aluminum and 851.0 aluminum are aluminum alloys. They have 87% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is 238.0 aluminum and the bottom bar is 851.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 76
69
Elongation at Break, % 1.5
3.9 to 9.1
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 28
26
Tensile Strength: Ultimate (UTS), MPa 210
130 to 140

Thermal Properties

Latent Heat of Fusion, J/g 430
410
Maximum Temperature: Mechanical, °C 170
180
Melting Completion (Liquidus), °C 600
630
Melting Onset (Solidus), °C 510
360
Specific Heat Capacity, J/kg-K 840
850
Thermal Conductivity, W/m-K 100
180
Thermal Expansion, µm/m-K 21
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
46
Electrical Conductivity: Equal Weight (Specific), % IACS 67
140

Otherwise Unclassified Properties

Base Metal Price, % relative 12
14
Density, g/cm3 3.4
3.1
Embodied Carbon, kg CO2/kg material 7.4
8.4
Embodied Energy, MJ/kg 140
160
Embodied Water, L/kg 1040
1140

Common Calculations

Stiffness to Weight: Axial, points 12
13
Stiffness to Weight: Bending, points 42
45
Strength to Weight: Axial, points 17
12 to 13
Strength to Weight: Bending, points 23
19 to 20
Thermal Diffusivity, mm2/s 37
69
Thermal Shock Resistance, points 9.1
6.1 to 6.3

Alloy Composition


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Aluminum (Al), % 81.9 to 84.9
86.6 to 91.5
Copper (Cu), % 9.5 to 10.5
0.7 to 1.3
Iron (Fe), % 1.0 to 1.5
0 to 0.7
Magnesium (Mg), % 0 to 0.25
0 to 0.1
Manganese (Mn), % 0
0 to 0.1
Nickel (Ni), % 0
0.3 to 0.7
Silicon (Si), % 3.6 to 4.4
2.0 to 3.0
Tin (Sn), % 0
5.5 to 7.0
Titanium (Ti), % 0
0 to 0.2
Zinc (Zn), % 1.0 to 1.5
0
Residuals, % 0
0 to 0.3