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AZ91B Magnesium vs. AWS BAg-28

AZ91B magnesium belongs to the magnesium alloys classification, while AWS BAg-28 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 AZ91B magnesium and the bottom bar is AWS BAg-28.

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 240
150

Thermal Properties

Latent Heat of Fusion, J/g 360
140
Melting Completion (Liquidus), °C 600
710
Melting Onset (Solidus), °C 470
650
Specific Heat Capacity, J/kg-K 990
320
Thermal Expansion, µm/m-K 26
21

Otherwise Unclassified Properties

Density, g/cm3 1.7
8.9
Embodied Carbon, kg CO2/kg material 22
40
Embodied Energy, MJ/kg 160
630

Common Calculations

Stiffness to Weight: Axial, points 15
5.6
Stiffness to Weight: Bending, points 69
17
Strength to Weight: Axial, points 38
4.7
Strength to Weight: Bending, points 49
7.1
Thermal Shock Resistance, points 14
5.8

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
0
Copper (Cu), % 0 to 0.35
29 to 31
Magnesium (Mg), % 87.9 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0
Nickel (Ni), % 0 to 0.030
0
Silicon (Si), % 0 to 0.5
0
Silver (Ag), % 0
39 to 41
Tin (Sn), % 0
1.5 to 2.5
Zinc (Zn), % 0.35 to 1.0
26 to 30
Residuals, % 0
0 to 0.15