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AWS BAg-4 vs. AWS BMg-1

AWS BAg-4 belongs to the otherwise unclassified metals classification, while AWS BMg-1 belongs to the magnesium 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-4 and the bottom bar is AWS BMg-1.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 91
47
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 34
18
Tensile Strength: Ultimate (UTS), MPa 150
180

Thermal Properties

Brazing Temperature, °C 740 to 900
600 to 630
Latent Heat of Fusion, J/g 140
350
Melting Completion (Liquidus), °C 780
600
Melting Onset (Solidus), °C 670
440
Specific Heat Capacity, J/kg-K 330
980
Thermal Expansion, µm/m-K 21
26

Otherwise Unclassified Properties

Density, g/cm3 8.9
1.8
Embodied Carbon, kg CO2/kg material 40
22
Embodied Energy, MJ/kg 630
160

Common Calculations

Stiffness to Weight: Axial, points 5.7
14
Stiffness to Weight: Bending, points 17
66
Strength to Weight: Axial, points 4.7
27
Strength to Weight: Bending, points 7.1
39
Thermal Shock Resistance, points 5.7
10

Alloy Composition


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Aluminum (Al), % 0
8.3 to 9.7
Beryllium (Be), % 0
0.00020 to 0.00080
Copper (Cu), % 29 to 31
0 to 0.050
Iron (Fe), % 0
0 to 0.0050
Magnesium (Mg), % 0
86.1 to 89.8
Manganese (Mn), % 0
0.15 to 1.5
Nickel (Ni), % 1.5 to 2.5
0 to 0.0050
Silicon (Si), % 0
0 to 0.050
Silver (Ag), % 39 to 41
0
Zinc (Zn), % 26 to 30
1.7 to 2.3
Residuals, % 0 to 0.15
0 to 0.3