4006 Aluminum vs. R31233 Cobalt
4006 aluminum belongs to the aluminum alloys classification, while R31233 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 4006 aluminum and the bottom bar is R31233 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
Elastic (Young's, Tensile) Modulus, GPa | 69 | |
220 |
Elongation at Break, % | 3.4 to 24 | |
17 |
Fatigue Strength, MPa | 35 to 110 | |
220 |
Poisson's Ratio | 0.33 | |
0.29 |
Shear Modulus, GPa | 26 | |
85 |
Tensile Strength: Ultimate (UTS), MPa | 110 to 160 | |
1020 |
Tensile Strength: Yield (Proof), MPa | 62 to 140 | |
420 |
Thermal Properties
Latent Heat of Fusion, J/g | 410 | |
320 |
Melting Completion (Liquidus), °C | 640 | |
1350 |
Melting Onset (Solidus), °C | 620 | |
1330 |
Specific Heat Capacity, J/kg-K | 900 | |
440 |
Thermal Conductivity, W/m-K | 220 | |
12 |
Thermal Expansion, µm/m-K | 23 | |
13 |
Electrical Properties
Electrical Conductivity: Equal Volume, % IACS | 56 | |
2.0 |
Electrical Conductivity: Equal Weight (Specific), % IACS | 180 | |
2.1 |
Otherwise Unclassified Properties
Density, g/cm3 | 2.7 | |
8.6 |
Embodied Carbon, kg CO2/kg material | 8.1 | |
8.4 |
Embodied Energy, MJ/kg | 150 | |
110 |
Embodied Water, L/kg | 1180 | |
480 |
Common Calculations
Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 5.1 to 26 | |
140 |
Resilience: Unit (Modulus of Resilience), kJ/m3 | 28 to 130 | |
410 |
Stiffness to Weight: Axial, points | 14 | |
14 |
Stiffness to Weight: Bending, points | 50 | |
23 |
Strength to Weight: Axial, points | 11 to 16 | |
33 |
Strength to Weight: Bending, points | 19 to 24 | |
26 |
Thermal Diffusivity, mm2/s | 89 | |
3.2 |
Thermal Shock Resistance, points | 4.9 to 7.0 | |
25 |
Alloy Composition
Aluminum (Al), % | 97.4 to 98.7 | |
0 |
Boron (B), % | 0 | |
0 to 0.015 |
Carbon (C), % | 0 | |
0.020 to 0.1 |
Chromium (Cr), % | 0 to 0.2 | |
23.5 to 27.5 |
Cobalt (Co), % | 0 | |
44.7 to 63.3 |
Copper (Cu), % | 0 to 0.1 | |
0 |
Iron (Fe), % | 0.5 to 0.8 | |
1.0 to 5.0 |
Magnesium (Mg), % | 0 to 0.010 | |
0 |
Manganese (Mn), % | 0 to 0.050 | |
0.1 to 1.5 |
Molybdenum (Mo), % | 0 | |
4.0 to 6.0 |
Nickel (Ni), % | 0 | |
7.0 to 11 |
Nitrogen (N), % | 0 | |
0.030 to 0.12 |
Phosphorus (P), % | 0 | |
0 to 0.030 |
Silicon (Si), % | 0.8 to 1.2 | |
0.050 to 1.0 |
Sulfur (S), % | 0 | |
0 to 0.020 |
Tungsten (W), % | 0 | |
1.0 to 3.0 |
Zinc (Zn), % | 0 to 0.050 | |
0 |
Residuals, % | 0 to 0.15 | |
0 |