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EN-MC65120 Magnesium vs. R30012 Cobalt

EN-MC65120 magnesium belongs to the magnesium alloys classification, while R30012 cobalt belongs to the cobalt alloys. There are 27 material properties with values for both materials. Properties with values for just one material (6, 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-MC65120 magnesium and the bottom bar is R30012 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
220
Elongation at Break, % 3.1
1.0
Fatigue Strength, MPa 80
320
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 17
86
Tensile Strength: Ultimate (UTS), MPa 160
830
Tensile Strength: Yield (Proof), MPa 110
650

Thermal Properties

Latent Heat of Fusion, J/g 330
320
Melting Completion (Liquidus), °C 590
1470
Melting Onset (Solidus), °C 520
1280
Specific Heat Capacity, J/kg-K 970
440
Thermal Conductivity, W/m-K 100
15
Thermal Expansion, µm/m-K 26
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 120
1.8

Otherwise Unclassified Properties

Density, g/cm3 1.9
8.8
Embodied Carbon, kg CO2/kg material 25
8.3
Embodied Energy, MJ/kg 190
120
Embodied Water, L/kg 930
480

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.4
7.7
Resilience: Unit (Modulus of Resilience), kJ/m3 140
960
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 62
23
Strength to Weight: Axial, points 23
26
Strength to Weight: Bending, points 34
22
Thermal Diffusivity, mm2/s 56
3.8
Thermal Shock Resistance, points 9.8
23

Alloy Composition


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Carbon (C), % 0
1.4 to 2.0
Chromium (Cr), % 0
27 to 32
Cobalt (Co), % 0
47.5 to 64.1
Copper (Cu), % 0 to 0.030
0
Iron (Fe), % 0 to 0.010
0 to 3.0
Magnesium (Mg), % 91.8 to 95.1
0
Manganese (Mn), % 0 to 0.15
0
Molybdenum (Mo), % 0
0 to 1.0
Nickel (Ni), % 0 to 0.0050
0 to 3.0
Silicon (Si), % 0 to 0.010
0 to 2.0
Tungsten (W), % 0
7.5 to 9.5
Unspecified Rare Earths, % 2.5 to 4.0
0
Zinc (Zn), % 2.0 to 3.0
0
Zirconium (Zr), % 0.4 to 1.0
0
Residuals, % 0 to 0.010
0