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4145 Aluminum vs. AWS BAg-2

4145 aluminum belongs to the aluminum alloys classification, while AWS BAg-2 belongs to the otherwise unclassified metals. There are 18 material properties with values for both materials. Properties with values for just one material (13, 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 4145 aluminum and the bottom bar is AWS BAg-2.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 73
82
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 28
31
Tensile Strength: Ultimate (UTS), MPa 120
180

Thermal Properties

Brazing Temperature, °C 570 to 600
700 to 840
Latent Heat of Fusion, J/g 540
130
Melting Completion (Liquidus), °C 590
700
Melting Onset (Solidus), °C 520
610
Specific Heat Capacity, J/kg-K 880
310
Thermal Expansion, µm/m-K 21
22

Otherwise Unclassified Properties

Density, g/cm3 2.8
8.9
Embodied Carbon, kg CO2/kg material 7.6
35
Embodied Energy, MJ/kg 140
550

Common Calculations

Stiffness to Weight: Axial, points 14
5.1
Stiffness to Weight: Bending, points 50
16
Strength to Weight: Axial, points 12
5.6
Strength to Weight: Bending, points 19
7.9
Thermal Shock Resistance, points 5.5
7.0

Alloy Composition

Aluminum (Al), % 83 to 87.4
0
Cadmium (Cd), % 0
17 to 19
Chromium (Cr), % 0 to 0.15
0
Copper (Cu), % 3.3 to 4.7
25 to 27
Iron (Fe), % 0 to 0.8
0
Magnesium (Mg), % 0 to 0.15
0
Manganese (Mn), % 0 to 0.15
0
Silicon (Si), % 9.3 to 10.7
0
Silver (Ag), % 0
34 to 36
Zinc (Zn), % 0 to 0.2
19 to 23
Residuals, % 0
0 to 0.15