R30605 Cobalt vs. ASTM B817 Type II
R30605 cobalt belongs to the cobalt alloys classification, while ASTM B817 type II belongs to the titanium alloys. There are 21 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.
For each property being compared, the top bar is R30605 cobalt and the bottom bar is ASTM B817 type II.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 100 |
| Elongation at Break, % | 34 | |
| 3.0 to 13 |
| Fatigue Strength, MPa | 260 to 590 | |
| 390 to 530 |
| Poisson's Ratio | 0.29 | |
| 0.32 |
| Shear Modulus, GPa | 81 | |
| 40 |
| Tensile Strength: Ultimate (UTS), MPa | 1130 to 1900 | |
| 900 to 960 |
| Tensile Strength: Yield (Proof), MPa | 470 to 1600 | |
| 780 to 900 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 400 |
| Melting Completion (Liquidus), °C | 1410 | |
| 1580 |
| Melting Onset (Solidus), °C | 1330 | |
| 1530 |
| Specific Heat Capacity, J/kg-K | 410 | |
| 550 |
| Thermal Expansion, µm/m-K | 12 | |
| 9.9 |
Otherwise Unclassified Properties
| Density, g/cm3 | 9.6 | |
| 4.6 |
| Embodied Carbon, kg CO2/kg material | 9.8 | |
| 40 |
| Embodied Energy, MJ/kg | 140 | |
| 650 |
| Embodied Water, L/kg | 450 | |
| 220 |
Common Calculations
| Stiffness to Weight: Axial, points | 12 | |
| 13 |
| Stiffness to Weight: Bending, points | 21 | |
| 34 |
| Strength to Weight: Axial, points | 33 to 55 | |
| 55 to 58 |
| Strength to Weight: Bending, points | 25 to 36 | |
| 45 to 47 |
| Thermal Shock Resistance, points | 31 to 52 | |
| 62 to 66 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 5.0 to 6.0 |
| Carbon (C), % | 0.050 to 0.15 | |
| 0 to 0.1 |
| Chlorine (Cl), % | 0 | |
| 0 to 0.2 |
| Chromium (Cr), % | 19 to 21 | |
| 0 |
| Cobalt (Co), % | 46.4 to 57 | |
| 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 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 0 |
| Nickel (Ni), % | 9.0 to 11 | |
| 0 |
| Nitrogen (N), % | 0 | |
| 0 to 0.040 |
| Oxygen (O), % | 0 | |
| 0 to 0.3 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 |
| Silicon (Si), % | 0 to 0.4 | |
| 0 to 0.1 |
| Sodium (Na), % | 0 | |
| 0 to 0.2 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 |
| Tin (Sn), % | 0 | |
| 1.5 to 2.5 |
| Titanium (Ti), % | 0 | |
| 82.1 to 87.8 |
| Tungsten (W), % | 14 to 16 | |
| 0 |
| Vanadium (V), % | 0 | |
| 5.0 to 6.0 |
| Residuals, % | 0 | |
| 0 to 0.4 |