R30021 Cobalt vs. ASTM A514 Steel
R30021 cobalt belongs to the cobalt alloys classification, while ASTM A514 steel belongs to the iron alloys. There are 27 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 R30021 cobalt and the bottom bar is ASTM A514 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 220 | |
| 190 |
| Elongation at Break, % | 9.0 | |
| 18 to 21 |
| Fatigue Strength, MPa | 250 | |
| 470 to 540 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 86 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 700 | |
| 790 to 830 |
| Tensile Strength: Yield (Proof), MPa | 500 | |
| 690 to 770 |
Thermal Properties
| Latent Heat of Fusion, J/g | 330 | |
| 250 to 260 |
| Melting Completion (Liquidus), °C | 1350 | |
| 1460 |
| Melting Onset (Solidus), °C | 1190 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 470 |
| Thermal Conductivity, W/m-K | 15 | |
| 37 to 51 |
| Thermal Expansion, µm/m-K | 11 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.9 | |
| 7.2 to 7.6 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.1 | |
| 8.3 to 8.8 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.4 | |
| 7.8 to 7.9 |
| Embodied Carbon, kg CO2/kg material | 8.0 | |
| 1.6 to 1.8 |
| Embodied Energy, MJ/kg | 110 | |
| 21 to 25 |
| Embodied Water, L/kg | 520 | |
| 48 to 57 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 57 | |
| 140 to 170 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 570 | |
| 1280 to 1590 |
| Stiffness to Weight: Axial, points | 15 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 23 | |
| 28 to 29 |
| Strength to Weight: Bending, points | 21 | |
| 24 to 25 |
| Thermal Diffusivity, mm2/s | 3.8 | |
| 10 to 14 |
| Thermal Shock Resistance, points | 21 | |
| 23 to 24 |