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8090 Aluminum vs. AWS BAg-21

8090 aluminum belongs to the aluminum alloys classification, while AWS BAg-21 belongs to the otherwise unclassified metals. There are 16 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is 8090 aluminum and the bottom bar is AWS BAg-21.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 67
85
Poisson's Ratio 0.33
0.36
Shear Modulus, GPa 25
31
Tensile Strength: Ultimate (UTS), MPa 340 to 490
150

Thermal Properties

Latent Heat of Fusion, J/g 400
140
Melting Completion (Liquidus), °C 660
800
Melting Onset (Solidus), °C 600
690
Specific Heat Capacity, J/kg-K 960
280
Thermal Expansion, µm/m-K 24
19

Otherwise Unclassified Properties

Density, g/cm3 2.7
9.8
Embodied Energy, MJ/kg 170
970

Common Calculations

Stiffness to Weight: Axial, points 14
4.8
Stiffness to Weight: Bending, points 50
15
Strength to Weight: Axial, points 34 to 49
4.2
Strength to Weight: Bending, points 39 to 50
6.4
Thermal Shock Resistance, points 15 to 22
6.6

Alloy Composition

Aluminum (Al), % 93 to 98.4
0
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 1.0 to 1.6
27.5 to 29.5
Iron (Fe), % 0 to 0.3
0
Lithium (Li), % 2.2 to 2.7
0
Magnesium (Mg), % 0.6 to 1.3
0
Manganese (Mn), % 0 to 0.1
0
Nickel (Ni), % 0
2.0 to 3.0
Silicon (Si), % 0 to 0.2
0
Silver (Ag), % 0
62 to 64
Tin (Sn), % 0
5.0 to 7.0
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.25
0
Zirconium (Zr), % 0.040 to 0.16
0
Residuals, % 0
0 to 0.15