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4004 Aluminum vs. AWS BAu-5

4004 aluminum belongs to the aluminum alloys classification, while AWS BAu-5 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 4004 aluminum and the bottom bar is AWS BAu-5.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
140
Poisson's Ratio 0.33
0.37
Shear Modulus, GPa 27
50
Tensile Strength: Ultimate (UTS), MPa 110
210

Thermal Properties

Brazing Temperature, °C 590 to 600
1170 to 1230
Latent Heat of Fusion, J/g 540
180
Melting Completion (Liquidus), °C 600
1170
Melting Onset (Solidus), °C 560
1140
Specific Heat Capacity, J/kg-K 910
280
Thermal Expansion, µm/m-K 22
12

Otherwise Unclassified Properties

Density, g/cm3 2.6
13

Common Calculations

Stiffness to Weight: Axial, points 15
5.8
Stiffness to Weight: Bending, points 54
13
Strength to Weight: Axial, points 12
4.5
Strength to Weight: Bending, points 20
6.0
Thermal Shock Resistance, points 5.1
9.0

Alloy Composition

Aluminum (Al), % 86 to 90
0
Copper (Cu), % 0 to 0.25
0
Gold (Au), % 0
29.5 to 30.5
Iron (Fe), % 0 to 0.8
0
Magnesium (Mg), % 1.0 to 2.0
0
Manganese (Mn), % 0 to 0.1
0
Nickel (Ni), % 0
35.5 to 36.4
Palladium (Pd), % 0
33.5 to 34.5
Silicon (Si), % 9.0 to 10.5
0
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0
0 to 0.15