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AWS BAg-8a vs. QE22A Magnesium

AWS BAg-8a belongs to the otherwise unclassified metals classification, while QE22A magnesium belongs to the magnesium alloys. There are 15 material properties with values for both materials. Properties with values for just one material (18, 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-8a and the bottom bar is QE22A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 83
44
Poisson's Ratio 0.36
0.29
Shear Modulus, GPa 31
17
Tensile Strength: Ultimate (UTS), MPa 150
250

Thermal Properties

Latent Heat of Fusion, J/g 140
340
Melting Completion (Liquidus), °C 770
640
Melting Onset (Solidus), °C 770
570
Specific Heat Capacity, J/kg-K 290
970
Thermal Expansion, µm/m-K 19
27

Otherwise Unclassified Properties

Density, g/cm3 10
2.0

Common Calculations

Stiffness to Weight: Axial, points 4.6
13
Stiffness to Weight: Bending, points 15
60
Strength to Weight: Axial, points 4.2
36
Strength to Weight: Bending, points 6.3
46
Thermal Shock Resistance, points 6.7
15

Alloy Composition

Copper (Cu), % 26.4 to 28.8
0 to 0.1
Lithium (Li), % 0.25 to 0.5
0
Magnesium (Mg), % 0
93.1 to 95.8
Nickel (Ni), % 0
0 to 0.010
Silver (Ag), % 71 to 73
2.0 to 3.0
Unspecified Rare Earths, % 0
1.8 to 2.5
Zirconium (Zr), % 0
0.4 to 1.0
Residuals, % 0
0 to 0.3