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2124 Aluminum vs. AWS BAu-3

2124 aluminum belongs to the aluminum alloys classification, while AWS BAu-3 belongs to the otherwise unclassified metals. There are 15 material properties with values for both materials. Properties with values for just one material (16, 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 2124 aluminum and the bottom bar is AWS BAu-3.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
110
Poisson's Ratio 0.33
0.37
Shear Modulus, GPa 27
41
Tensile Strength: Ultimate (UTS), MPa 490
220

Thermal Properties

Latent Heat of Fusion, J/g 390
160
Melting Completion (Liquidus), °C 640
1030
Melting Onset (Solidus), °C 500
970
Specific Heat Capacity, J/kg-K 880
300
Thermal Expansion, µm/m-K 23
16

Otherwise Unclassified Properties

Density, g/cm3 3.0
13

Common Calculations

Stiffness to Weight: Axial, points 13
5.0
Stiffness to Weight: Bending, points 46
13
Strength to Weight: Axial, points 45
4.9
Strength to Weight: Bending, points 46
6.4
Thermal Shock Resistance, points 21
8.7

Alloy Composition

Aluminum (Al), % 91.3 to 94.7
0
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 3.8 to 4.9
60.9 to 63
Gold (Au), % 0
34.5 to 35.5
Iron (Fe), % 0 to 0.3
0
Magnesium (Mg), % 1.2 to 1.8
0
Manganese (Mn), % 0.3 to 0.9
0
Nickel (Ni), % 0
2.5 to 3.5
Silicon (Si), % 0 to 0.2
0
Titanium (Ti), % 0 to 0.15
0
Zinc (Zn), % 0 to 0.25
0
Residuals, % 0
0 to 0.15