ASTM A203 Steel vs. R31233 Cobalt
ASTM A203 steel belongs to the iron alloys classification, while R31233 cobalt belongs to the cobalt 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 ASTM A203 steel and the bottom bar is R31233 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 220 |
| Elongation at Break, % | 22 to 26 | |
| 17 |
| Fatigue Strength, MPa | 210 to 280 | |
| 220 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 85 |
| Tensile Strength: Ultimate (UTS), MPa | 520 to 590 | |
| 1020 |
| Tensile Strength: Yield (Proof), MPa | 290 to 390 | |
| 420 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 320 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1350 |
| Melting Onset (Solidus), °C | 1420 | |
| 1330 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 440 |
| Thermal Conductivity, W/m-K | 52 | |
| 12 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.4 to 7.6 | |
| 2.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.5 to 8.7 | |
| 2.1 |
Otherwise Unclassified Properties
| Density, g/cm3 | 7.9 | |
| 8.6 |
| Embodied Carbon, kg CO2/kg material | 1.6 to 1.7 | |
| 8.4 |
| Embodied Energy, MJ/kg | 21 to 23 | |
| 110 |
| Embodied Water, L/kg | 50 to 52 | |
| 480 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 110 to 120 | |
| 140 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 230 to 410 | |
| 410 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 | |
| 23 |
| Strength to Weight: Axial, points | 18 to 21 | |
| 33 |
| Strength to Weight: Bending, points | 18 to 20 | |
| 26 |
| Thermal Diffusivity, mm2/s | 14 | |
| 3.2 |
| Thermal Shock Resistance, points | 15 to 17 | |
| 25 |