R31233 Cobalt vs. ASTM B817 Type II
R31233 cobalt belongs to the cobalt alloys classification, while ASTM B817 type II belongs to the titanium alloys. There are 23 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 R31233 cobalt and the bottom bar is ASTM B817 type II.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 220 | |
| 100 |
| Elongation at Break, % | 17 | |
| 3.0 to 13 |
| Fatigue Strength, MPa | 220 | |
| 390 to 530 |
| Poisson's Ratio | 0.29 | |
| 0.32 |
| Shear Modulus, GPa | 85 | |
| 40 |
| Tensile Strength: Ultimate (UTS), MPa | 1020 | |
| 900 to 960 |
| Tensile Strength: Yield (Proof), MPa | 420 | |
| 780 to 900 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 400 |
| Melting Completion (Liquidus), °C | 1350 | |
| 1580 |
| Melting Onset (Solidus), °C | 1330 | |
| 1530 |
| Specific Heat Capacity, J/kg-K | 440 | |
| 550 |
| Thermal Expansion, µm/m-K | 13 | |
| 9.9 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.6 | |
| 4.6 |
| Embodied Carbon, kg CO2/kg material | 8.4 | |
| 40 |
| Embodied Energy, MJ/kg | 110 | |
| 650 |
| Embodied Water, L/kg | 480 | |
| 220 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 140 | |
| 26 to 120 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 410 | |
| 2890 to 3890 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 23 | |
| 34 |
| Strength to Weight: Axial, points | 33 | |
| 55 to 58 |
| Strength to Weight: Bending, points | 26 | |
| 45 to 47 |
| Thermal Shock Resistance, points | 25 | |
| 62 to 66 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 5.0 to 6.0 |
| Boron (B), % | 0 to 0.015 | |
| 0 |
| Carbon (C), % | 0.020 to 0.1 | |
| 0 to 0.1 |
| Chlorine (Cl), % | 0 | |
| 0 to 0.2 |
| Chromium (Cr), % | 23.5 to 27.5 | |
| 0 |
| Cobalt (Co), % | 44.7 to 63.3 | |
| 0 |
| Copper (Cu), % | 0 | |
| 0.35 to 1.0 |
| Hydrogen (H), % | 0 | |
| 0 to 0.015 |
| Iron (Fe), % | 1.0 to 5.0 | |
| 0.35 to 1.0 |
| Manganese (Mn), % | 0.1 to 1.5 | |
| 0 |
| Molybdenum (Mo), % | 4.0 to 6.0 | |
| 0 |
| Nickel (Ni), % | 7.0 to 11 | |
| 0 |
| Nitrogen (N), % | 0.030 to 0.12 | |
| 0 to 0.040 |
| Oxygen (O), % | 0 | |
| 0 to 0.3 |
| Phosphorus (P), % | 0 to 0.030 | |
| 0 |
| Silicon (Si), % | 0.050 to 1.0 | |
| 0 to 0.1 |
| Sodium (Na), % | 0 | |
| 0 to 0.2 |
| Sulfur (S), % | 0 to 0.020 | |
| 0 |
| Tin (Sn), % | 0 | |
| 1.5 to 2.5 |
| Titanium (Ti), % | 0 | |
| 82.1 to 87.8 |
| Tungsten (W), % | 1.0 to 3.0 | |
| 0 |
| Vanadium (V), % | 0 | |
| 5.0 to 6.0 |
| Residuals, % | 0 | |
| 0 to 0.4 |