R31233 Cobalt vs. ASTM A285 Carbon Steel
R31233 cobalt belongs to the cobalt alloys classification, while ASTM A285 carbon 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 R31233 cobalt and the bottom bar is ASTM A285 carbon steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 220 | |
| 190 |
| Elongation at Break, % | 17 | |
| 30 to 34 |
| Fatigue Strength, MPa | 220 | |
| 150 to 180 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 85 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 1020 | |
| 380 to 450 |
| Tensile Strength: Yield (Proof), MPa | 420 | |
| 190 to 230 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 250 |
| Melting Completion (Liquidus), °C | 1350 | |
| 1470 |
| Melting Onset (Solidus), °C | 1330 | |
| 1420 to 1430 |
| Specific Heat Capacity, J/kg-K | 440 | |
| 470 |
| Thermal Conductivity, W/m-K | 12 | |
| 53 |
| Thermal Expansion, µm/m-K | 13 | |
| 12 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.0 | |
| 7.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.1 | |
| 8.0 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.6 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 8.4 | |
| 1.4 |
| Embodied Energy, MJ/kg | 110 | |
| 18 |
| Embodied Water, L/kg | 480 | |
| 46 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 140 | |
| 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 410 | |
| 94 to 150 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 23 | |
| 24 |
| Strength to Weight: Axial, points | 33 | |
| 13 to 16 |
| Strength to Weight: Bending, points | 26 | |
| 15 to 17 |
| Thermal Diffusivity, mm2/s | 3.2 | |
| 14 |
| Thermal Shock Resistance, points | 25 | |
| 12 to 14 |