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AWS BAg-20 vs. 4145 Aluminum

AWS BAg-20 belongs to the otherwise unclassified metals classification, while 4145 aluminum belongs to the aluminum alloys. 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 AWS BAg-20 and the bottom bar is 4145 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 93
73
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 35
28
Tensile Strength: Ultimate (UTS), MPa 160
120

Thermal Properties

Brazing Temperature, °C 770 to 900
570 to 600
Latent Heat of Fusion, J/g 150
540
Melting Completion (Liquidus), °C 770
590
Melting Onset (Solidus), °C 680
520
Specific Heat Capacity, J/kg-K 340
880
Thermal Expansion, µm/m-K 21
21

Otherwise Unclassified Properties

Density, g/cm3 8.6
2.8
Embodied Carbon, kg CO2/kg material 30
7.6
Embodied Energy, MJ/kg 480
140

Common Calculations

Stiffness to Weight: Axial, points 6.0
14
Stiffness to Weight: Bending, points 17
50
Strength to Weight: Axial, points 5.1
12
Strength to Weight: Bending, points 7.6
19
Thermal Shock Resistance, points 5.9
5.5

Alloy Composition

Aluminum (Al), % 0
83 to 87.4
Chromium (Cr), % 0
0 to 0.15
Copper (Cu), % 37 to 39
3.3 to 4.7
Iron (Fe), % 0
0 to 0.8
Magnesium (Mg), % 0
0 to 0.15
Manganese (Mn), % 0
0 to 0.15
Silicon (Si), % 0
9.3 to 10.7
Silver (Ag), % 29 to 31
0
Zinc (Zn), % 30 to 34
0 to 0.2
Residuals, % 0 to 0.15
0 to 0.15