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EN-MC21320 Magnesium vs. ASTM B596 Au-Cu

EN-MC21320 magnesium belongs to the magnesium alloys classification, while ASTM B596 Au-Cu belongs to the otherwise unclassified metals. There are 19 material properties with values for both materials. Properties with values for just one material (12, 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-MC21320 magnesium and the bottom bar is ASTM B596 Au-Cu.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
100
Elongation at Break, % 7.5
4.3 to 17
Poisson's Ratio 0.29
0.41
Shear Modulus, GPa 18
36
Shear Strength, MPa 130
280 to 360
Tensile Strength: Ultimate (UTS), MPa 230
450 to 620

Thermal Properties

Latent Heat of Fusion, J/g 370
77
Melting Completion (Liquidus), °C 600
1060
Melting Onset (Solidus), °C 530
930
Specific Heat Capacity, J/kg-K 1000
150
Thermal Expansion, µm/m-K 26
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 17
14
Electrical Conductivity: Equal Weight (Specific), % IACS 91
6.7

Otherwise Unclassified Properties

Density, g/cm3 1.6
18

Common Calculations

Stiffness to Weight: Axial, points 15
3.1
Stiffness to Weight: Bending, points 72
8.5
Strength to Weight: Axial, points 38
6.8 to 9.4
Strength to Weight: Bending, points 50
7.1 to 8.8
Thermal Shock Resistance, points 13
22 to 30

Alloy Composition


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Aluminum (Al), % 3.5 to 5.0
0
Copper (Cu), % 0 to 0.010
9.0 to 11
Gold (Au), % 0
89 to 91
Iron (Fe), % 0 to 0.0050
0
Magnesium (Mg), % 92.5 to 95.9
0
Manganese (Mn), % 0.1 to 0.7
0
Nickel (Ni), % 0 to 0.0020
0
Silicon (Si), % 0.5 to 1.5
0
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.010
0 to 0.4