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AZ81A Magnesium vs. AWS BAg-5

AZ81A magnesium belongs to the magnesium alloys classification, while AWS BAg-5 belongs to the otherwise unclassified metals. There are 17 material properties with values for both materials. Properties with values for just one material (17, 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 AZ81A magnesium and the bottom bar is AWS BAg-5.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
88
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 18
33
Tensile Strength: Ultimate (UTS), MPa 160 to 240
150

Thermal Properties

Latent Heat of Fusion, J/g 350
140
Melting Completion (Liquidus), °C 600
740
Melting Onset (Solidus), °C 500
660
Specific Heat Capacity, J/kg-K 990
320
Thermal Expansion, µm/m-K 27
21

Otherwise Unclassified Properties

Density, g/cm3 1.7
9.0
Embodied Carbon, kg CO2/kg material 23
44
Embodied Energy, MJ/kg 160
700

Common Calculations

Stiffness to Weight: Axial, points 15
5.4
Stiffness to Weight: Bending, points 70
16
Strength to Weight: Axial, points 26 to 39
4.6
Strength to Weight: Bending, points 38 to 50
6.9
Thermal Shock Resistance, points 9.1 to 14
5.9

Alloy Composition


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Aluminum (Al), % 7.0 to 8.1
0
Copper (Cu), % 0 to 0.1
29 to 31
Magnesium (Mg), % 89.8 to 92.5
0
Manganese (Mn), % 0.13 to 0.35
0
Nickel (Ni), % 0 to 0.010
0
Silicon (Si), % 0 to 0.3
0
Silver (Ag), % 0
44 to 46
Zinc (Zn), % 0.4 to 1.0
23 to 27
Residuals, % 0 to 0.3
0 to 0.15