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AZ61A Magnesium vs. R30001 Cobalt

AZ61A magnesium belongs to the magnesium alloys classification, while R30001 cobalt belongs to the cobalt alloys. There are 24 material properties with values for both materials. Properties with values for just one material (8, 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 AZ61A magnesium and the bottom bar is R30001 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Compressive (Crushing) Strength, MPa 380
1930
Elastic (Young's, Tensile) Modulus, GPa 45
220
Elongation at Break, % 11
1.0
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 17
86
Tensile Strength: Ultimate (UTS), MPa 280
620

Thermal Properties

Latent Heat of Fusion, J/g 350
310
Melting Completion (Liquidus), °C 600
1530
Melting Onset (Solidus), °C 530
1260
Specific Heat Capacity, J/kg-K 990
430
Thermal Conductivity, W/m-K 79
15
Thermal Expansion, µm/m-K 27
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 12
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 62
1.8

Otherwise Unclassified Properties

Density, g/cm3 1.7
9.0
Embodied Carbon, kg CO2/kg material 23
8.9
Embodied Energy, MJ/kg 160
130
Embodied Water, L/kg 980
460

Common Calculations

Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 69
22
Strength to Weight: Axial, points 46
19
Strength to Weight: Bending, points 56
18
Thermal Diffusivity, mm2/s 47
3.7
Thermal Shock Resistance, points 17
19

Alloy Composition


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Aluminum (Al), % 5.5 to 7.2
0
Carbon (C), % 0
2.0 to 3.0
Chromium (Cr), % 0
28 to 32
Cobalt (Co), % 0
43 to 59
Copper (Cu), % 0 to 0.050
0
Iron (Fe), % 0 to 0.0050
0 to 3.0
Magnesium (Mg), % 90.3 to 93.9
0
Manganese (Mn), % 0.15 to 0.5
0
Molybdenum (Mo), % 0
0 to 1.0
Nickel (Ni), % 0 to 0.0050
0 to 3.0
Silicon (Si), % 0 to 0.1
0 to 2.0
Tungsten (W), % 0
11 to 13
Zinc (Zn), % 0.4 to 1.5
0
Residuals, % 0 to 0.3
0