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EN-MC35110 Magnesium vs. R30003 Cobalt

EN-MC35110 magnesium belongs to the magnesium alloys classification, while R30003 cobalt belongs to the cobalt alloys. There are 27 material properties with values for both materials. Properties with values for just one material (4, 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-MC35110 magnesium and the bottom bar is R30003 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
210
Elongation at Break, % 3.1
10 to 73
Fatigue Strength, MPa 110
320 to 560
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 18
83
Tensile Strength: Ultimate (UTS), MPa 230
970 to 1720
Tensile Strength: Yield (Proof), MPa 150
510 to 1090

Thermal Properties

Latent Heat of Fusion, J/g 330
310
Melting Completion (Liquidus), °C 600
1400
Melting Onset (Solidus), °C 520
1440
Specific Heat Capacity, J/kg-K 970
450
Thermal Conductivity, W/m-K 110
13
Thermal Expansion, µm/m-K 26
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 130
2.1

Otherwise Unclassified Properties

Base Metal Price, % relative 18
95
Density, g/cm3 1.9
8.4
Embodied Carbon, kg CO2/kg material 24
8.0
Embodied Energy, MJ/kg 170
110
Embodied Water, L/kg 940
400

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 260
600 to 2790
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 63
24
Strength to Weight: Axial, points 34
32 to 57
Strength to Weight: Bending, points 44
26 to 38
Thermal Diffusivity, mm2/s 61
3.3
Thermal Shock Resistance, points 14
26 to 45

Alloy Composition


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Boron (B), % 0
0 to 0.1
Carbon (C), % 0
0 to 0.15
Chromium (Cr), % 0
19 to 21
Cobalt (Co), % 0
39 to 41
Copper (Cu), % 0 to 0.030
0
Iron (Fe), % 0 to 0.010
10 to 20.5
Magnesium (Mg), % 92 to 95.4
0
Manganese (Mn), % 0 to 0.15
1.5 to 2.5
Molybdenum (Mo), % 0
6.0 to 8.0
Nickel (Ni), % 0 to 0.0050
14 to 16
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 0 to 0.010
0 to 1.2
Sulfur (S), % 0
0 to 0.015
Unspecified Rare Earths, % 0.75 to 1.8
0
Zinc (Zn), % 3.5 to 5.0
0
Zirconium (Zr), % 0.4 to 1.0
0
Residuals, % 0 to 0.010
0