R30816 Cobalt vs. ASTM B522 Class II
R30816 cobalt belongs to the cobalt alloys classification, while ASTM B522 class II belongs to the otherwise unclassified metals. There are 19 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.
For each property being compared, the top bar is R30816 cobalt and the bottom bar is ASTM B522 class II.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 96 |
| Elongation at Break, % | 23 | |
| 1.1 to 28 |
| Poisson's Ratio | 0.3 | |
| 0.41 |
| Shear Modulus, GPa | 81 | |
| 34 |
| Tensile Strength: Ultimate (UTS), MPa | 1020 | |
| 280 to 490 |
| Tensile Strength: Yield (Proof), MPa | 460 | |
| 120 to 210 |
Thermal Properties
| Latent Heat of Fusion, J/g | 300 | |
| 77 |
| Melting Completion (Liquidus), °C | 1540 | |
| 1030 |
| Melting Onset (Solidus), °C | 1460 | |
| 1030 |
| Specific Heat Capacity, J/kg-K | 420 | |
| 160 |
| Thermal Expansion, µm/m-K | 12 | |
| 15 |
Otherwise Unclassified Properties
| Density, g/cm3 | 9.1 | |
| 17 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 190 | |
| 4.4 to 63 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 510 | |
| 75 to 230 |
| Stiffness to Weight: Axial, points | 13 | |
| 3.1 |
| Stiffness to Weight: Bending, points | 22 | |
| 8.9 |
| Strength to Weight: Axial, points | 31 | |
| 4.4 to 7.8 |
| Strength to Weight: Bending, points | 25 | |
| 5.5 to 8.0 |
| Thermal Shock Resistance, points | 28 | |
| 13 to 24 |
Alloy Composition
| Carbon (C), % | 0.32 to 0.42 | |
| 0 |
| Chromium (Cr), % | 19 to 21 | |
| 0 |
| Cobalt (Co), % | 40 to 49.8 | |
| 0 |
| Gold (Au), % | 0 | |
| 68.5 to 69.5 |
| Iron (Fe), % | 0 to 5.0 | |
| 0 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 0 |
| Molybdenum (Mo), % | 3.5 to 4.5 | |
| 0 |
| Nickel (Ni), % | 19 to 21 | |
| 0 |
| Niobium (Nb), % | 3.5 to 4.5 | |
| 0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 |
| Platinum (Pt), % | 0 | |
| 5.5 to 6.5 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 |
| Silver (Ag), % | 0 | |
| 24.5 to 25.5 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.010 |
| Tantalum (Ta), % | 3.5 to 4.5 | |
| 0 |
| Tungsten (W), % | 3.5 to 4.5 | |
| 0 |
| Residuals, % | 0 | |
| 0 to 0.26 |