R30021 Cobalt vs. Titanium 6-6-2
R30021 cobalt belongs to the cobalt alloys classification, while titanium 6-6-2 belongs to the titanium alloys. There are 26 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.
For each property being compared, the top bar is R30021 cobalt and the bottom bar is titanium 6-6-2.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 220 | |
| 120 |
| Elongation at Break, % | 9.0 | |
| 6.7 to 9.0 |
| Fatigue Strength, MPa | 250 | |
| 590 to 670 |
| Poisson's Ratio | 0.29 | |
| 0.32 |
| Shear Modulus, GPa | 86 | |
| 44 |
| Tensile Strength: Ultimate (UTS), MPa | 700 | |
| 1140 to 1370 |
| Tensile Strength: Yield (Proof), MPa | 500 | |
| 1040 to 1230 |
Thermal Properties
| Latent Heat of Fusion, J/g | 330 | |
| 400 |
| Melting Completion (Liquidus), °C | 1350 | |
| 1610 |
| Melting Onset (Solidus), °C | 1190 | |
| 1560 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 540 |
| Thermal Conductivity, W/m-K | 15 | |
| 5.5 |
| Thermal Expansion, µm/m-K | 11 | |
| 9.4 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.9 | |
| 1.1 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.1 | |
| 2.1 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.4 | |
| 4.8 |
| Embodied Carbon, kg CO2/kg material | 8.0 | |
| 29 |
| Embodied Energy, MJ/kg | 110 | |
| 470 |
| Embodied Water, L/kg | 520 | |
| 200 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 57 | |
| 89 to 99 |
| Stiffness to Weight: Axial, points | 15 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 34 |
| Strength to Weight: Axial, points | 23 | |
| 66 to 79 |
| Strength to Weight: Bending, points | 21 | |
| 50 to 57 |
| Thermal Diffusivity, mm2/s | 3.8 | |
| 2.1 |
| Thermal Shock Resistance, points | 21 | |
| 75 to 90 |
Alloy Composition
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| Aluminum (Al), % | 0 | |
| 5.0 to 6.0 |
| Carbon (C), % | 0.2 to 0.35 | |
| 0 to 0.050 |
| Chromium (Cr), % | 26 to 29 | |
| 0 |
| Cobalt (Co), % | 61.7 to 67.3 | |
| 0 |
| Copper (Cu), % | 0 | |
| 0.35 to 1.0 |
| Hydrogen (H), % | 0 | |
| 0 to 0.015 |
| Iron (Fe), % | 0 to 3.0 | |
| 0.35 to 1.0 |
| Molybdenum (Mo), % | 4.5 to 6.0 | |
| 5.0 to 6.0 |
| Nickel (Ni), % | 2.0 to 3.0 | |
| 0 |
| Nitrogen (N), % | 0 | |
| 0 to 0.040 |
| Oxygen (O), % | 0 | |
| 0 to 0.2 |
| Silicon (Si), % | 0 to 1.5 | |
| 0 |
| Tin (Sn), % | 0 | |
| 1.5 to 2.5 |
| Titanium (Ti), % | 0 | |
| 82.8 to 87.8 |
| Residuals, % | 0 | |
| 0 to 0.4 |