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EQ21A Magnesium vs. AWS BVAu-4

EQ21A magnesium belongs to the magnesium alloys classification, while AWS BVAu-4 belongs to the otherwise unclassified metals. 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 EQ21A magnesium and the bottom bar is AWS BVAu-4.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 44
110
Poisson's Ratio 0.29
0.4
Shear Modulus, GPa 17
41
Tensile Strength: Ultimate (UTS), MPa 250
190

Thermal Properties

Latent Heat of Fusion, J/g 340
100
Melting Completion (Liquidus), °C 640
950
Melting Onset (Solidus), °C 560
950
Specific Heat Capacity, J/kg-K 980
190
Thermal Expansion, µm/m-K 27
14

Otherwise Unclassified Properties

Density, g/cm3 1.9
17

Common Calculations

Stiffness to Weight: Axial, points 13
3.6
Stiffness to Weight: Bending, points 63
9.3
Strength to Weight: Axial, points 37
3.0
Strength to Weight: Bending, points 47
4.2
Thermal Shock Resistance, points 15
8.7

Alloy Composition


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Cadmium (Cd), % 0
0 to 0.0010
Carbon (C), % 0
0 to 0.0050
Copper (Cu), % 0.050 to 0.1
0
Gold (Au), % 0
81.5 to 82.5
Lead (Pb), % 0
0 to 0.0020
Magnesium (Mg), % 93.9 to 96.8
0
Nickel (Ni), % 0 to 0.010
17.5 to 18.5
Phosphorus (P), % 0
0 to 0.0020
Silver (Ag), % 1.3 to 1.7
0
Unspecified Rare Earths, % 1.5 to 3.0
0
Zinc (Zn), % 0
0 to 0.0010
Zirconium (Zr), % 0.4 to 1.0
0
Residuals, % 0 to 0.3
0