R30816 Cobalt vs. ASTM A204 Steel
R30816 cobalt belongs to the cobalt alloys classification, while ASTM A204 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 A204 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 280 | |
| 160 to 180 |
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 190 |
| Elongation at Break, % | 23 | |
| 18 to 22 |
| Fatigue Strength, MPa | 250 | |
| 200 to 220 |
| Poisson's Ratio | 0.3 | |
| 0.29 |
| Shear Modulus, GPa | 81 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 1020 | |
| 520 to 590 |
| Tensile Strength: Yield (Proof), MPa | 460 | |
| 290 to 330 |
Thermal Properties
| Latent Heat of Fusion, J/g | 300 | |
| 250 |
| Melting Completion (Liquidus), °C | 1540 | |
| 1470 |
| Melting Onset (Solidus), °C | 1460 | |
| 1420 to 1430 |
| Specific Heat Capacity, J/kg-K | 420 | |
| 470 |
| Thermal Conductivity, W/m-K | 13 | |
| 52 |
| Thermal Expansion, µm/m-K | 12 | |
| 13 |
Otherwise Unclassified Properties
| Density, g/cm3 | 9.1 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 20 | |
| 1.5 |
| Embodied Energy, MJ/kg | 320 | |
| 20 |
| Embodied Water, L/kg | 440 | |
| 47 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 190 | |
| 90 to 95 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 510 | |
| 220 to 290 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 22 | |
| 24 |
| Strength to Weight: Axial, points | 31 | |
| 18 to 21 |
| Strength to Weight: Bending, points | 25 | |
| 18 to 20 |
| Thermal Diffusivity, mm2/s | 3.3 | |
| 14 |
| Thermal Shock Resistance, points | 28 | |
| 15 to 17 |