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AM60A Magnesium vs. R30075 Cobalt

AM60A magnesium belongs to the magnesium alloys classification, while R30075 cobalt belongs to the cobalt alloys. There are 27 material properties with values for both materials. Properties with values for just one material (5, 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 AM60A magnesium and the bottom bar is R30075 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
210 to 250
Elongation at Break, % 8.8
12
Fatigue Strength, MPa 70
250 to 840
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 18
82 to 98
Tensile Strength: Ultimate (UTS), MPa 230
780 to 1280
Tensile Strength: Yield (Proof), MPa 130
480 to 840

Thermal Properties

Latent Heat of Fusion, J/g 350
320
Melting Completion (Liquidus), °C 620
1360
Melting Onset (Solidus), °C 550
1290
Specific Heat Capacity, J/kg-K 1000
450
Thermal Conductivity, W/m-K 62
13
Thermal Expansion, µm/m-K 26
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 13
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 69
2.1

Otherwise Unclassified Properties

Density, g/cm3 1.7
8.4
Embodied Carbon, kg CO2/kg material 23
8.1
Embodied Energy, MJ/kg 160
110
Embodied Water, L/kg 990
530

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 17
84 to 140
Resilience: Unit (Modulus of Resilience), kJ/m3 190
560 to 1410
Stiffness to Weight: Axial, points 15
14 to 17
Stiffness to Weight: Bending, points 71
24 to 25
Strength to Weight: Axial, points 37
26 to 42
Strength to Weight: Bending, points 49
22 to 31
Thermal Diffusivity, mm2/s 37
3.5
Thermal Shock Resistance, points 14
21 to 29

Alloy Composition

Aluminum (Al), % 5.5 to 6.5
0 to 0.1
Boron (B), % 0
0 to 0.010
Carbon (C), % 0
0 to 0.35
Chromium (Cr), % 0
27 to 30
Cobalt (Co), % 0
58.7 to 68
Copper (Cu), % 0 to 0.35
0
Iron (Fe), % 0
0 to 0.75
Magnesium (Mg), % 91.8 to 94.4
0
Manganese (Mn), % 0.13 to 0.6
0 to 1.0
Molybdenum (Mo), % 0
5.0 to 7.0
Nickel (Ni), % 0 to 0.030
0 to 0.5
Nitrogen (N), % 0
0 to 0.25
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 0
0 to 0.1
Tungsten (W), % 0
0 to 0.2
Zinc (Zn), % 0 to 0.22
0