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EN-MC21220 Magnesium vs. EN 2.4964 Cobalt

EN-MC21220 magnesium belongs to the magnesium alloys classification, while EN 2.4964 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-MC21220 magnesium and the bottom bar is EN 2.4964 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
220
Elongation at Break, % 11
40
Fatigue Strength, MPa 89
220
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 17
86
Tensile Strength: Ultimate (UTS), MPa 210
960
Tensile Strength: Yield (Proof), MPa 120
390

Thermal Properties

Latent Heat of Fusion, J/g 350
290
Melting Completion (Liquidus), °C 600
1630
Melting Onset (Solidus), °C 540
1550
Specific Heat Capacity, J/kg-K 1000
400
Thermal Conductivity, W/m-K 65
15
Thermal Expansion, µm/m-K 27
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 16
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 87
1.8

Otherwise Unclassified Properties

Density, g/cm3 1.7
9.6
Embodied Carbon, kg CO2/kg material 23
9.8
Embodied Energy, MJ/kg 160
140
Embodied Water, L/kg 990
450

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 20
310
Resilience: Unit (Modulus of Resilience), kJ/m3 160
340
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 71
21
Strength to Weight: Axial, points 34
28
Strength to Weight: Bending, points 46
23
Thermal Diffusivity, mm2/s 39
3.9
Thermal Shock Resistance, points 12
25

Alloy Composition


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Aluminum (Al), % 4.4 to 5.5
0
Carbon (C), % 0
0.050 to 0.15
Chromium (Cr), % 0
19 to 21
Cobalt (Co), % 0
46.4 to 58
Copper (Cu), % 0 to 0.010
0
Iron (Fe), % 0 to 0.0050
0 to 3.0
Magnesium (Mg), % 93.5 to 95.5
0
Manganese (Mn), % 0.1 to 0.6
0 to 2.0
Nickel (Ni), % 0 to 0.0020
9.0 to 11
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0 to 0.1
0 to 0.4
Sulfur (S), % 0
0 to 0.015
Tungsten (W), % 0
14 to 16
Zinc (Zn), % 0 to 0.3
0
Residuals, % 0 to 0.010
0