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R30006 Cobalt vs. 4006 Aluminum

R30006 cobalt belongs to the cobalt alloys classification, while 4006 aluminum belongs to the aluminum alloys. There are 27 material properties with values for both materials. Properties with values for just one material (7, 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 R30006 cobalt and the bottom bar is 4006 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
69
Elongation at Break, % 1.0
3.4 to 24
Fatigue Strength, MPa 260
35 to 110
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 85
26
Tensile Strength: Ultimate (UTS), MPa 900
110 to 160
Tensile Strength: Yield (Proof), MPa 540
62 to 140

Thermal Properties

Latent Heat of Fusion, J/g 320
410
Melting Completion (Liquidus), °C 1400
640
Melting Onset (Solidus), °C 1290
620
Specific Heat Capacity, J/kg-K 450
900
Thermal Conductivity, W/m-K 15
220
Thermal Expansion, µm/m-K 11
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.6
56
Electrical Conductivity: Equal Weight (Specific), % IACS 1.7
180

Otherwise Unclassified Properties

Density, g/cm3 8.6
2.7
Embodied Carbon, kg CO2/kg material 7.8
8.1
Embodied Energy, MJ/kg 110
150
Embodied Water, L/kg 500
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.8
5.1 to 26
Resilience: Unit (Modulus of Resilience), kJ/m3 670
28 to 130
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
50
Strength to Weight: Axial, points 29
11 to 16
Strength to Weight: Bending, points 24
19 to 24
Thermal Diffusivity, mm2/s 3.9
89
Thermal Shock Resistance, points 26
4.9 to 7.0

Alloy Composition


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Aluminum (Al), % 0
97.4 to 98.7
Carbon (C), % 0.9 to 1.4
0
Chromium (Cr), % 27 to 32
0 to 0.2
Cobalt (Co), % 48.6 to 68.1
0
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 0 to 3.0
0.5 to 0.8
Magnesium (Mg), % 0
0 to 0.010
Manganese (Mn), % 0
0 to 0.050
Molybdenum (Mo), % 0 to 1.0
0
Nickel (Ni), % 0 to 3.0
0
Silicon (Si), % 0 to 2.0
0.8 to 1.2
Tungsten (W), % 4.0 to 6.0
0
Zinc (Zn), % 0
0 to 0.050
Residuals, % 0
0 to 0.15