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EN-MC21220 Magnesium vs. AWS BAu-5

EN-MC21220 magnesium belongs to the magnesium alloys classification, while AWS BAu-5 belongs to the otherwise unclassified metals. There are 15 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 EN-MC21220 magnesium and the bottom bar is AWS BAu-5.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
140
Poisson's Ratio 0.29
0.37
Shear Modulus, GPa 17
50
Tensile Strength: Ultimate (UTS), MPa 210
210

Thermal Properties

Latent Heat of Fusion, J/g 350
180
Melting Completion (Liquidus), °C 600
1170
Melting Onset (Solidus), °C 540
1140
Specific Heat Capacity, J/kg-K 1000
280
Thermal Expansion, µm/m-K 27
12

Otherwise Unclassified Properties

Density, g/cm3 1.7
13

Common Calculations

Stiffness to Weight: Axial, points 15
5.8
Stiffness to Weight: Bending, points 71
13
Strength to Weight: Axial, points 34
4.5
Strength to Weight: Bending, points 46
6.0
Thermal Shock Resistance, points 12
9.0

Alloy Composition


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Aluminum (Al), % 4.4 to 5.5
0
Copper (Cu), % 0 to 0.010
0
Gold (Au), % 0
29.5 to 30.5
Iron (Fe), % 0 to 0.0050
0
Magnesium (Mg), % 93.5 to 95.5
0
Manganese (Mn), % 0.1 to 0.6
0
Nickel (Ni), % 0 to 0.0020
35.5 to 36.4
Palladium (Pd), % 0
33.5 to 34.5
Silicon (Si), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.3
0
Residuals, % 0 to 0.010
0 to 0.15