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AWS BMg-1 vs. AWS BAg-4

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

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition


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