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AWS BCo-1 vs. ZC63A Magnesium

AWS BCo-1 belongs to the cobalt alloys classification, while ZC63A magnesium belongs to the magnesium alloys. There are 18 material properties with values for both materials. Properties with values for just one material (15, 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 BCo-1 and the bottom bar is ZC63A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
48
Poisson's Ratio 0.3
0.29
Shear Modulus, GPa 78
19
Tensile Strength: Ultimate (UTS), MPa 700
220

Thermal Properties

Latent Heat of Fusion, J/g 420
330
Melting Completion (Liquidus), °C 1150
550
Melting Onset (Solidus), °C 1120
470
Specific Heat Capacity, J/kg-K 480
950
Thermal Expansion, µm/m-K 12
26

Otherwise Unclassified Properties

Density, g/cm3 8.1
2.1
Embodied Carbon, kg CO2/kg material 8.0
22
Embodied Energy, MJ/kg 110
150
Embodied Water, L/kg 430
920

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
58
Strength to Weight: Axial, points 24
29
Strength to Weight: Bending, points 22
38
Thermal Shock Resistance, points 21
12

Alloy Composition

Aluminum (Al), % 0 to 0.050
0
Boron (B), % 0.7 to 0.9
0
Carbon (C), % 0.35 to 0.45
0
Chromium (Cr), % 18 to 20
0
Cobalt (Co), % 46 to 54
0
Copper (Cu), % 0
2.4 to 3.0
Iron (Fe), % 0 to 1.0
0
Magnesium (Mg), % 0
89.2 to 91.9
Manganese (Mn), % 0
0.25 to 0.75
Nickel (Ni), % 16 to 18
0 to 0.010
Phosphorus (P), % 0 to 0.020
0
Selenium (Se), % 0 to 0.0050
0
Silicon (Si), % 7.5 to 8.5
0 to 0.2
Sulfur (S), % 0 to 0.020
0
Titanium (Ti), % 0 to 0.050
0
Tungsten (W), % 3.5 to 4.5
0
Zinc (Zn), % 0
5.5 to 6.5
Zirconium (Zr), % 0 to 0.050
0
Residuals, % 0 to 0.5
0 to 0.3