R30003 Cobalt vs. Grade 21 Titanium
R30003 cobalt belongs to the cobalt alloys classification, while grade 21 titanium belongs to the titanium alloys. There are 25 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.
For each property being compared, the top bar is R30003 cobalt and the bottom bar is grade 21 titanium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 140 |
| Elongation at Break, % | 10 to 73 | |
| 9.0 to 17 |
| Fatigue Strength, MPa | 320 to 560 | |
| 550 to 660 |
| Poisson's Ratio | 0.29 | |
| 0.32 |
| Shear Modulus, GPa | 83 | |
| 51 |
| Tensile Strength: Ultimate (UTS), MPa | 970 to 1720 | |
| 890 to 1340 |
| Tensile Strength: Yield (Proof), MPa | 510 to 1090 | |
| 870 to 1170 |
Thermal Properties
| Latent Heat of Fusion, J/g | 310 | |
| 410 |
| Melting Completion (Liquidus), °C | 1400 | |
| 1740 |
| Melting Onset (Solidus), °C | 1440 | |
| 1690 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 500 |
| Thermal Conductivity, W/m-K | 13 | |
| 7.5 |
| Thermal Expansion, µm/m-K | 13 | |
| 7.1 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 95 | |
| 60 |
| Density, g/cm3 | 8.4 | |
| 5.4 |
| Embodied Carbon, kg CO2/kg material | 8.0 | |
| 32 |
| Embodied Energy, MJ/kg | 110 | |
| 490 |
| Embodied Water, L/kg | 400 | |
| 180 |
Common Calculations
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 600 to 2790 | |
| 2760 to 5010 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 | |
| 32 |
| Strength to Weight: Axial, points | 32 to 57 | |
| 46 to 69 |
| Strength to Weight: Bending, points | 26 to 38 | |
| 38 to 50 |
| Thermal Diffusivity, mm2/s | 3.3 | |
| 2.8 |
| Thermal Shock Resistance, points | 26 to 45 | |
| 66 to 100 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 2.5 to 3.5 |
| Boron (B), % | 0 to 0.1 | |
| 0 |
| Carbon (C), % | 0 to 0.15 | |
| 0 to 0.050 |
| Chromium (Cr), % | 19 to 21 | |
| 0 |
| Cobalt (Co), % | 39 to 41 | |
| 0 |
| Hydrogen (H), % | 0 | |
| 0 to 0.015 |
| Iron (Fe), % | 10 to 20.5 | |
| 0 to 0.4 |
| Manganese (Mn), % | 1.5 to 2.5 | |
| 0 |
| Molybdenum (Mo), % | 6.0 to 8.0 | |
| 14 to 16 |
| Nickel (Ni), % | 14 to 16 | |
| 0 |
| Niobium (Nb), % | 0 | |
| 2.2 to 3.2 |
| Nitrogen (N), % | 0 | |
| 0 to 0.030 |
| Oxygen (O), % | 0 | |
| 0 to 0.17 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 |
| Silicon (Si), % | 0 to 1.2 | |
| 0.15 to 0.25 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 |
| Titanium (Ti), % | 0 | |
| 76 to 81.2 |
| Residuals, % | 0 | |
| 0 to 0.4 |