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AM60B Magnesium vs. R30016 Cobalt

AM60B magnesium belongs to the magnesium alloys classification, while R30016 cobalt belongs to the cobalt alloys. There are 27 material properties with values for both materials. Properties with values for just one material (9, 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 AM60B magnesium and the bottom bar is R30016 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
220
Elongation at Break, % 11
8.4
Fatigue Strength, MPa 96
290
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 17
85
Tensile Strength: Ultimate (UTS), MPa 230
1010
Tensile Strength: Yield (Proof), MPa 130
580

Thermal Properties

Latent Heat of Fusion, J/g 350
320
Melting Completion (Liquidus), °C 620
1360
Melting Onset (Solidus), °C 540
1270
Specific Heat Capacity, J/kg-K 1000
450
Thermal Conductivity, W/m-K 61
15
Thermal Expansion, µm/m-K 26
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 13
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 72
2.0

Otherwise Unclassified Properties

Density, g/cm3 1.7
8.5
Embodied Carbon, kg CO2/kg material 23
7.7
Embodied Energy, MJ/kg 160
110
Embodied Water, L/kg 990
500

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 21
72
Resilience: Unit (Modulus of Resilience), kJ/m3 190
770
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 71
24
Strength to Weight: Axial, points 38
33
Strength to Weight: Bending, points 50
26
Thermal Diffusivity, mm2/s 37
3.9
Thermal Shock Resistance, points 14
24

Alloy Composition

Aluminum (Al), % 5.5 to 6.5
0
Carbon (C), % 0
0.9 to 1.4
Chromium (Cr), % 0
28 to 32
Cobalt (Co), % 0
49.6 to 66.9
Copper (Cu), % 0 to 0.010
0
Iron (Fe), % 0 to 0.0050
0 to 3.0
Magnesium (Mg), % 92.6 to 94.3
0
Manganese (Mn), % 0.24 to 0.6
0.5 to 2.0
Molybdenum (Mo), % 0
0 to 1.5
Nickel (Ni), % 0 to 0.0020
0 to 3.0
Silicon (Si), % 0 to 0.1
0.2 to 2.0
Tungsten (W), % 0
3.5 to 5.5
Zinc (Zn), % 0 to 0.22
0