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EN-MC21320 Magnesium vs. AWS BCo-1

EN-MC21320 magnesium belongs to the magnesium alloys classification, while AWS BCo-1 belongs to the cobalt alloys. There are 18 material properties with values for both materials. Properties with values for just one material (14, 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 AWS BCo-1.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
200
Poisson's Ratio 0.29
0.3
Shear Modulus, GPa 18
78
Tensile Strength: Ultimate (UTS), MPa 230
700

Thermal Properties

Latent Heat of Fusion, J/g 370
420
Melting Completion (Liquidus), °C 600
1150
Melting Onset (Solidus), °C 530
1120
Specific Heat Capacity, J/kg-K 1000
480
Thermal Expansion, µm/m-K 26
12

Otherwise Unclassified Properties

Density, g/cm3 1.6
8.1
Embodied Carbon, kg CO2/kg material 23
8.0
Embodied Energy, MJ/kg 160
110
Embodied Water, L/kg 980
430

Common Calculations

Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 72
24
Strength to Weight: Axial, points 38
24
Strength to Weight: Bending, points 50
22
Thermal Shock Resistance, points 13
21

Alloy Composition

Aluminum (Al), % 3.5 to 5.0
0 to 0.050
Boron (B), % 0
0.7 to 0.9
Carbon (C), % 0
0.35 to 0.45
Chromium (Cr), % 0
18 to 20
Cobalt (Co), % 0
46 to 54
Copper (Cu), % 0 to 0.010
0
Iron (Fe), % 0 to 0.0050
0 to 1.0
Magnesium (Mg), % 92.5 to 95.9
0
Manganese (Mn), % 0.1 to 0.7
0
Nickel (Ni), % 0 to 0.0020
16 to 18
Phosphorus (P), % 0
0 to 0.020
Selenium (Se), % 0
0 to 0.0050
Silicon (Si), % 0.5 to 1.5
7.5 to 8.5
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 0
0 to 0.050
Tungsten (W), % 0
3.5 to 4.5
Zinc (Zn), % 0 to 0.2
0
Zirconium (Zr), % 0
0 to 0.050
Residuals, % 0 to 0.010
0 to 0.5