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EN-MC65210 Magnesium vs. R30012 Cobalt

EN-MC65210 magnesium belongs to the magnesium alloys classification, while R30012 cobalt belongs to the cobalt alloys. There are 26 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-MC65210 magnesium and the bottom bar is R30012 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 44
220
Elongation at Break, % 2.8
1.0
Fatigue Strength, MPa 110
320
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 17
86
Tensile Strength: Ultimate (UTS), MPa 270
830
Tensile Strength: Yield (Proof), MPa 200
650

Thermal Properties

Latent Heat of Fusion, J/g 340
320
Melting Completion (Liquidus), °C 610
1470
Melting Onset (Solidus), °C 540
1280
Specific Heat Capacity, J/kg-K 970
440
Thermal Conductivity, W/m-K 110
15
Thermal Expansion, µm/m-K 26
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 110
1.8

Otherwise Unclassified Properties

Density, g/cm3 2.0
8.8
Embodied Carbon, kg CO2/kg material 27
8.3
Embodied Energy, MJ/kg 220
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 6.9
7.7
Resilience: Unit (Modulus of Resilience), kJ/m3 450
960
Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 59
23
Strength to Weight: Axial, points 38
26
Strength to Weight: Bending, points 47
22
Thermal Diffusivity, mm2/s 58
3.8
Thermal Shock Resistance, points 17
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), % 92.6 to 95.6
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
Silver (Ag), % 2.0 to 3.0
0
Tungsten (W), % 0
7.5 to 9.5
Unspecified Rare Earths, % 2.0 to 3.0
0
Zinc (Zn), % 0 to 0.2
0
Zirconium (Zr), % 0.4 to 1.0
0
Residuals, % 0 to 0.010
0