R30605 Cobalt vs. ASTM A148 Cast Steel
R30605 cobalt belongs to the cobalt alloys classification, while ASTM A148 cast steel belongs to the iron alloys. There are 25 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 R30605 cobalt and the bottom bar is ASTM A148 cast steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 190 |
| Elongation at Break, % | 34 | |
| 5.7 to 25 |
| Fatigue Strength, MPa | 260 to 590 | |
| 280 to 670 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 81 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 1130 to 1900 | |
| 630 to 1300 |
| Tensile Strength: Yield (Proof), MPa | 470 to 1600 | |
| 390 to 1160 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 250 |
| Melting Completion (Liquidus), °C | 1410 | |
| 1460 |
| Melting Onset (Solidus), °C | 1330 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 410 | |
| 470 |
| Thermal Conductivity, W/m-K | 9.6 | |
| 37 to 47 |
| Thermal Expansion, µm/m-K | 12 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.0 | |
| 7.3 to 7.5 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 1.8 | |
| 8.3 to 8.6 |
Otherwise Unclassified Properties
| Density, g/cm3 | 9.6 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 9.8 | |
| 1.5 to 1.7 |
| Embodied Energy, MJ/kg | 140 | |
| 20 to 22 |
| Embodied Water, L/kg | 450 | |
| 48 to 53 |
Common Calculations
| Stiffness to Weight: Axial, points | 12 | |
| 13 |
| Stiffness to Weight: Bending, points | 21 | |
| 24 |
| Strength to Weight: Axial, points | 33 to 55 | |
| 22 to 46 |
| Strength to Weight: Bending, points | 25 to 36 | |
| 21 to 34 |
| Thermal Diffusivity, mm2/s | 2.5 | |
| 9.9 to 13 |
| Thermal Shock Resistance, points | 31 to 52 | |
| 18 to 38 |