R31233 Cobalt vs. AWS E2209
R31233 cobalt belongs to the cobalt alloys classification, while AWS E2209 belongs to the iron alloys. They have a modest 39% of their average alloy composition in common, which, by itself, doesn't mean much. There are 23 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 R31233 cobalt and the bottom bar is AWS E2209.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 220 | |
| 200 |
| Elongation at Break, % | 17 | |
| 23 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 85 | |
| 79 |
| Tensile Strength: Ultimate (UTS), MPa | 1020 | |
| 770 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 300 |
| Melting Completion (Liquidus), °C | 1350 | |
| 1440 |
| Melting Onset (Solidus), °C | 1330 | |
| 1390 |
| Specific Heat Capacity, J/kg-K | 440 | |
| 480 |
| Thermal Conductivity, W/m-K | 12 | |
| 16 |
| Thermal Expansion, µm/m-K | 13 | |
| 14 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.0 | |
| 2.1 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.1 | |
| 2.5 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.6 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 8.4 | |
| 4.0 |
| Embodied Energy, MJ/kg | 110 | |
| 55 |
| Embodied Water, L/kg | 480 | |
| 170 |
Common Calculations
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 23 | |
| 25 |
| Strength to Weight: Axial, points | 33 | |
| 27 |
| Strength to Weight: Bending, points | 26 | |
| 24 |
| Thermal Diffusivity, mm2/s | 3.2 | |
| 4.3 |
| Thermal Shock Resistance, points | 25 | |
| 20 |
Alloy Composition
| Boron (B), % | 0 to 0.015 | |
| 0 |
| Carbon (C), % | 0.020 to 0.1 | |
| 0 to 0.040 |
| Chromium (Cr), % | 23.5 to 27.5 | |
| 21.5 to 23.5 |
| Cobalt (Co), % | 44.7 to 63.3 | |
| 0 |
| Copper (Cu), % | 0 | |
| 0 to 0.75 |
| Iron (Fe), % | 1.0 to 5.0 | |
| 58.4 to 66.9 |
| Manganese (Mn), % | 0.1 to 1.5 | |
| 0.5 to 2.0 |
| Molybdenum (Mo), % | 4.0 to 6.0 | |
| 2.5 to 3.5 |
| Nickel (Ni), % | 7.0 to 11 | |
| 8.5 to 10.5 |
| Nitrogen (N), % | 0.030 to 0.12 | |
| 0.080 to 0.2 |
| Phosphorus (P), % | 0 to 0.030 | |
| 0 to 0.040 |
| Silicon (Si), % | 0.050 to 1.0 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.020 | |
| 0 to 0.030 |
| Tungsten (W), % | 1.0 to 3.0 | |
| 0 |