R30816 Cobalt vs. ASTM A148 Cast Steel
R30816 cobalt belongs to the cobalt alloys classification, while ASTM A148 cast steel belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.
For each property being compared, the top bar is R30816 cobalt and the bottom bar is ASTM A148 cast steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 280 | |
| 190 to 390 |
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 190 |
| Elongation at Break, % | 23 | |
| 5.7 to 25 |
| Fatigue Strength, MPa | 250 | |
| 280 to 670 |
| Poisson's Ratio | 0.3 | |
| 0.29 |
| Reduction in Area, % | 22 | |
| 13 to 45 |
| Shear Modulus, GPa | 81 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 1020 | |
| 630 to 1300 |
| Tensile Strength: Yield (Proof), MPa | 460 | |
| 390 to 1160 |
Thermal Properties
| Latent Heat of Fusion, J/g | 300 | |
| 250 |
| Melting Completion (Liquidus), °C | 1540 | |
| 1460 |
| Melting Onset (Solidus), °C | 1460 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 420 | |
| 470 |
| Thermal Conductivity, W/m-K | 13 | |
| 37 to 47 |
| 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 1.7 |
| Embodied Energy, MJ/kg | 320 | |
| 20 to 22 |
| Embodied Water, L/kg | 440 | |
| 48 to 53 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 190 | |
| 71 to 150 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 510 | |
| 400 to 3570 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 22 | |
| 24 |
| Strength to Weight: Axial, points | 31 | |
| 22 to 46 |
| Strength to Weight: Bending, points | 25 | |
| 21 to 34 |
| Thermal Diffusivity, mm2/s | 3.3 | |
| 9.9 to 13 |
| Thermal Shock Resistance, points | 28 | |
| 18 to 38 |