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EN-MC21120 Magnesium vs. EN 2.4964 Cobalt

EN-MC21120 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-MC21120 magnesium and the bottom bar is EN 2.4964 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
220
Elongation at Break, % 2.2 to 6.7
40
Fatigue Strength, MPa 84 to 96
220
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 18
86
Tensile Strength: Ultimate (UTS), MPa 200 to 270
960
Tensile Strength: Yield (Proof), MPa 130 to 170
390

Thermal Properties

Latent Heat of Fusion, J/g 350
290
Melting Completion (Liquidus), °C 600
1630
Melting Onset (Solidus), °C 490
1550
Specific Heat Capacity, J/kg-K 990
400
Thermal Conductivity, W/m-K 76
15
Thermal Expansion, µm/m-K 26
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 59
1.8

Otherwise Unclassified Properties

Density, g/cm3 1.7
9.6
Embodied Carbon, kg CO2/kg material 22
9.8
Embodied Energy, MJ/kg 160
140
Embodied Water, L/kg 990
450

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.0 to 15
310
Resilience: Unit (Modulus of Resilience), kJ/m3 180 to 320
340
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 69
21
Strength to Weight: Axial, points 31 to 43
28
Strength to Weight: Bending, points 43 to 53
23
Thermal Diffusivity, mm2/s 44
3.9
Thermal Shock Resistance, points 11 to 16
25

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
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 0.030
0
Iron (Fe), % 0 to 0.0050
0 to 3.0
Magnesium (Mg), % 88.6 to 91.3
0
Manganese (Mn), % 0.1 to 0.5
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 0.2
0 to 0.4
Sulfur (S), % 0
0 to 0.015
Tungsten (W), % 0
14 to 16
Zinc (Zn), % 0.35 to 1.0
0
Residuals, % 0 to 0.010
0