R31233 Cobalt vs. EN 1.4020 Stainless Steel
R31233 cobalt belongs to the cobalt alloys classification, while EN 1.4020 stainless steel belongs to the iron alloys. They have a modest 24% 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 (10, in this case) are not shown.
For each property being compared, the top bar is R31233 cobalt and the bottom bar is EN 1.4020 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 220 | |
| 200 |
| Elongation at Break, % | 17 | |
| 13 to 34 |
| Fatigue Strength, MPa | 220 | |
| 340 to 540 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 85 | |
| 77 |
| Tensile Strength: Ultimate (UTS), MPa | 1020 | |
| 770 to 1130 |
| Tensile Strength: Yield (Proof), MPa | 420 | |
| 430 to 950 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 280 |
| Melting Completion (Liquidus), °C | 1350 | |
| 1390 |
| Melting Onset (Solidus), °C | 1330 | |
| 1350 |
| Specific Heat Capacity, J/kg-K | 440 | |
| 480 |
| Thermal Expansion, µm/m-K | 13 | |
| 17 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.6 | |
| 7.6 |
| Embodied Carbon, kg CO2/kg material | 8.4 | |
| 2.5 |
| Embodied Energy, MJ/kg | 110 | |
| 37 |
| Embodied Water, L/kg | 480 | |
| 150 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 140 | |
| 140 to 220 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 410 | |
| 460 to 2290 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 23 | |
| 25 |
| Strength to Weight: Axial, points | 33 | |
| 28 to 41 |
| Strength to Weight: Bending, points | 26 | |
| 25 to 32 |
| Thermal Shock Resistance, points | 25 | |
| 16 to 23 |
Alloy Composition
| Boron (B), % | 0 to 0.015 | |
| 0 |
| Carbon (C), % | 0.020 to 0.1 | |
| 0 to 0.15 |
| Chromium (Cr), % | 23.5 to 27.5 | |
| 16.5 to 19 |
| Cobalt (Co), % | 44.7 to 63.3 | |
| 0 |
| Iron (Fe), % | 1.0 to 5.0 | |
| 62.8 to 71.8 |
| Manganese (Mn), % | 0.1 to 1.5 | |
| 11 to 14 |
| Molybdenum (Mo), % | 4.0 to 6.0 | |
| 0 |
| Nickel (Ni), % | 7.0 to 11 | |
| 0.5 to 2.5 |
| Nitrogen (N), % | 0.030 to 0.12 | |
| 0.2 to 0.45 |
| Phosphorus (P), % | 0 to 0.030 | |
| 0 to 0.045 |
| 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 |