R30816 Cobalt vs. ASTM A588 Steel
R30816 cobalt belongs to the cobalt alloys classification, while ASTM A588 steel belongs to the iron alloys. There are 26 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 R30816 cobalt and the bottom bar is ASTM A588 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 280 | |
| 170 |
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 190 |
| Elongation at Break, % | 23 | |
| 22 |
| Fatigue Strength, MPa | 250 | |
| 270 |
| Poisson's Ratio | 0.3 | |
| 0.29 |
| Shear Modulus, GPa | 81 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 1020 | |
| 550 |
| Tensile Strength: Yield (Proof), MPa | 460 | |
| 390 |
Thermal Properties
| Latent Heat of Fusion, J/g | 300 | |
| 250 to 260 |
| Melting Completion (Liquidus), °C | 1540 | |
| 1460 |
| Melting Onset (Solidus), °C | 1460 | |
| 1410 to 1420 |
| Specific Heat Capacity, J/kg-K | 420 | |
| 470 |
| Thermal Conductivity, W/m-K | 13 | |
| 43 to 44 |
| Thermal Expansion, µm/m-K | 12 | |
| 13 |
Otherwise Unclassified Properties
| Density, g/cm3 | 9.1 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 20 | |
| 1.5 to 1.6 |
| Embodied Energy, MJ/kg | 320 | |
| 20 to 22 |
| Embodied Water, L/kg | 440 | |
| 50 to 51 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 190 | |
| 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 510 | |
| 400 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 22 | |
| 24 |
| Strength to Weight: Axial, points | 31 | |
| 20 |
| Strength to Weight: Bending, points | 25 | |
| 19 |
| Thermal Diffusivity, mm2/s | 3.3 | |
| 12 |
| Thermal Shock Resistance, points | 28 | |
| 16 |