Annealed Grade 18 Titanium vs. Annealed R31538 Cobalt
Annealed grade 18 titanium belongs to the titanium alloys classification, while annealed R31538 cobalt belongs to the cobalt alloys. There are 28 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.
For each property being compared, the top bar is annealed grade 18 titanium and the bottom bar is annealed R31538 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 220 |
| Elongation at Break, % | 17 | |
| 23 |
| Fatigue Strength, MPa | 350 | |
| 310 |
| Poisson's Ratio | 0.32 | |
| 0.29 |
| Reduction in Area, % | 23 | |
| 22 |
| Shear Modulus, GPa | 40 | |
| 86 |
| Tensile Strength: Ultimate (UTS), MPa | 710 | |
| 1020 |
| Tensile Strength: Yield (Proof), MPa | 540 | |
| 580 |
Thermal Properties
| Latent Heat of Fusion, J/g | 410 | |
| 320 |
| Melting Completion (Liquidus), °C | 1640 | |
| 1360 |
| Melting Onset (Solidus), °C | 1590 | |
| 1290 |
| Specific Heat Capacity, J/kg-K | 550 | |
| 450 |
| Thermal Conductivity, W/m-K | 8.3 | |
| 13 |
| Thermal Expansion, µm/m-K | 9.9 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.3 | |
| 2.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.7 | |
| 2.1 |
Otherwise Unclassified Properties
| Density, g/cm3 | 4.5 | |
| 8.4 |
| Embodied Carbon, kg CO2/kg material | 41 | |
| 8.1 |
| Embodied Energy, MJ/kg | 670 | |
| 110 |
| Embodied Water, L/kg | 270 | |
| 530 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 110 | |
| 200 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1380 | |
| 750 |
| Stiffness to Weight: Axial, points | 13 | |
| 15 |
| Stiffness to Weight: Bending, points | 35 | |
| 24 |
| Strength to Weight: Axial, points | 44 | |
| 34 |
| Strength to Weight: Bending, points | 39 | |
| 27 |
| Thermal Diffusivity, mm2/s | 3.4 | |
| 3.5 |
| Thermal Shock Resistance, points | 48 | |
| 25 |
Alloy Composition
Deprecated: Automatic conversion of false to array is deprecated in /home/public/compare.php on line 452
| Aluminum (Al), % | 2.5 to 3.5 | |
| 0 |
| Carbon (C), % | 0 to 0.080 | |
| 0.15 to 0.35 |
| Chromium (Cr), % | 0 | |
| 26 to 30 |
| Cobalt (Co), % | 0 | |
| 58.7 to 68.9 |
| Hydrogen (H), % | 0 to 0.015 | |
| 0 |
| Iron (Fe), % | 0 to 0.25 | |
| 0 to 0.75 |
| Manganese (Mn), % | 0 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 0 | |
| 5.0 to 7.0 |
| Nickel (Ni), % | 0 | |
| 0 to 1.0 |
| Nitrogen (N), % | 0 to 0.030 | |
| 0 to 0.25 |
| Oxygen (O), % | 0 to 0.15 | |
| 0 |
| Palladium (Pd), % | 0.040 to 0.080 | |
| 0 |
| Silicon (Si), % | 0 | |
| 0 to 1.0 |
| Titanium (Ti), % | 92.5 to 95.5 | |
| 0 |
| Vanadium (V), % | 2.0 to 3.0 | |
| 0 |
| Residuals, % | 0 to 0.4 | |
| 0 |