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AWS BVAg-32 vs. AZ91A Magnesium

AWS BVAg-32 belongs to the otherwise unclassified metals classification, while AZ91A magnesium belongs to the magnesium alloys. There are 15 material properties with values for both materials. Properties with values for just one material (19, 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 BVAg-32 and the bottom bar is AZ91A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 93
46
Poisson's Ratio 0.37
0.29
Shear Modulus, GPa 34
18
Tensile Strength: Ultimate (UTS), MPa 180
240

Thermal Properties

Latent Heat of Fusion, J/g 140
360
Melting Completion (Liquidus), °C 950
600
Melting Onset (Solidus), °C 900
470
Specific Heat Capacity, J/kg-K 270
990
Thermal Expansion, µm/m-K 17
26

Otherwise Unclassified Properties

Density, g/cm3 11
1.7

Common Calculations

Stiffness to Weight: Axial, points 4.9
15
Stiffness to Weight: Bending, points 14
69
Strength to Weight: Axial, points 4.7
38
Strength to Weight: Bending, points 6.7
49
Thermal Shock Resistance, points 8.0
14

Alloy Composition

Aluminum (Al), % 0
8.3 to 9.7
Cadmium (Cd), % 0 to 0.0010
0
Carbon (C), % 0 to 0.0050
0
Copper (Cu), % 20 to 22
0 to 0.1
Lead (Pb), % 0 to 0.0020
0
Magnesium (Mg), % 0
88.2 to 91.2
Manganese (Mn), % 0
0.13 to 0.5
Nickel (Ni), % 0
0 to 0.030
Palladium (Pd), % 23 to 27
0
Phosphorus (P), % 0 to 0.0020
0
Silicon (Si), % 0
0 to 0.5
Silver (Ag), % 53 to 55
0
Zinc (Zn), % 0 to 0.0010
0.35 to 1.0