R30816 Cobalt vs. ASTM A732 Cast Steel
R30816 cobalt belongs to the cobalt alloys classification, while ASTM A732 cast steel belongs to the iron alloys. There are 26 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.
For each property being compared, the top bar is R30816 cobalt and the bottom bar is ASTM A732 cast steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 280 | |
| 140 to 440 |
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 190 |
| Elongation at Break, % | 23 | |
| 4.0 to 25 |
| Fatigue Strength, MPa | 250 | |
| 230 to 750 |
| Poisson's Ratio | 0.3 | |
| 0.29 |
| Shear Modulus, GPa | 81 | |
| 72 to 73 |
| Tensile Strength: Ultimate (UTS), MPa | 1020 | |
| 460 to 1470 |
| Tensile Strength: Yield (Proof), MPa | 460 | |
| 310 to 1340 |
Thermal Properties
| Latent Heat of Fusion, J/g | 300 | |
| 250 to 260 |
| Melting Completion (Liquidus), °C | 1540 | |
| 1440 to 1460 |
| Melting Onset (Solidus), °C | 1460 | |
| 1400 to 1420 |
| Specific Heat Capacity, J/kg-K | 420 | |
| 470 to 480 |
| Thermal Conductivity, W/m-K | 13 | |
| 39 to 50 |
| Thermal Expansion, µm/m-K | 12 | |
| 13 |
Otherwise Unclassified Properties
| Density, g/cm3 | 9.1 | |
| 7.8 to 7.9 |
| Embodied Carbon, kg CO2/kg material | 20 | |
| 1.4 to 1.7 |
| Embodied Energy, MJ/kg | 320 | |
| 19 to 24 |
| Embodied Water, L/kg | 440 | |
| 47 to 54 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 190 | |
| 45 to 130 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 510 | |
| 260 to 4770 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 22 | |
| 24 |
| Strength to Weight: Axial, points | 31 | |
| 16 to 52 |
| Strength to Weight: Bending, points | 25 | |
| 17 to 37 |
| Thermal Diffusivity, mm2/s | 3.3 | |
| 10 to 14 |
| Thermal Shock Resistance, points | 28 | |
| 14 to 43 |