Grade 5 Titanium vs. R30021 Cobalt
Grade 5 titanium belongs to the titanium alloys classification, while R30021 cobalt belongs to the cobalt alloys. There are 28 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.
For each property being compared, the top bar is grade 5 titanium and the bottom bar is R30021 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 220 |
| Elongation at Break, % | 8.6 to 11 | |
| 9.0 |
| Fatigue Strength, MPa | 530 to 630 | |
| 250 |
| Poisson's Ratio | 0.32 | |
| 0.29 |
| Rockwell C Hardness | 33 | |
| 32 |
| Shear Modulus, GPa | 40 | |
| 86 |
| Tensile Strength: Ultimate (UTS), MPa | 1000 to 1190 | |
| 700 |
| Tensile Strength: Yield (Proof), MPa | 910 to 1110 | |
| 500 |
Thermal Properties
| Latent Heat of Fusion, J/g | 410 | |
| 330 |
| Melting Completion (Liquidus), °C | 1610 | |
| 1350 |
| Melting Onset (Solidus), °C | 1650 | |
| 1190 |
| Specific Heat Capacity, J/kg-K | 560 | |
| 450 |
| Thermal Conductivity, W/m-K | 6.8 | |
| 15 |
| Thermal Expansion, µm/m-K | 8.9 | |
| 11 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.0 | |
| 1.9 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.0 | |
| 2.1 |
Otherwise Unclassified Properties
| Density, g/cm3 | 4.4 | |
| 8.4 |
| Embodied Carbon, kg CO2/kg material | 38 | |
| 8.0 |
| Embodied Energy, MJ/kg | 610 | |
| 110 |
| Embodied Water, L/kg | 200 | |
| 520 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 100 to 110 | |
| 57 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 3980 to 5880 | |
| 570 |
| Stiffness to Weight: Axial, points | 13 | |
| 15 |
| Stiffness to Weight: Bending, points | 35 | |
| 24 |
| Strength to Weight: Axial, points | 62 to 75 | |
| 23 |
| Strength to Weight: Bending, points | 50 to 56 | |
| 21 |
| Thermal Diffusivity, mm2/s | 2.7 | |
| 3.8 |
| Thermal Shock Resistance, points | 76 to 91 | |
| 21 |
Alloy Composition
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| Aluminum (Al), % | 5.5 to 6.8 | |
| 0 |
| Carbon (C), % | 0 to 0.080 | |
| 0.2 to 0.35 |
| Chromium (Cr), % | 0 | |
| 26 to 29 |
| Cobalt (Co), % | 0 | |
| 61.7 to 67.3 |
| Hydrogen (H), % | 0 to 0.015 | |
| 0 |
| Iron (Fe), % | 0 to 0.4 | |
| 0 to 3.0 |
| Molybdenum (Mo), % | 0 | |
| 4.5 to 6.0 |
| Nickel (Ni), % | 0 | |
| 2.0 to 3.0 |
| Nitrogen (N), % | 0 to 0.050 | |
| 0 |
| Oxygen (O), % | 0 to 0.2 | |
| 0 |
| Silicon (Si), % | 0 | |
| 0 to 1.5 |
| Titanium (Ti), % | 87.4 to 91 | |
| 0 |
| Vanadium (V), % | 3.5 to 4.5 | |
| 0 |
| Yttrium (Y), % | 0 to 0.0050 | |
| 0 |
| Residuals, % | 0 to 0.4 | |
| 0 |