AISI 201L Stainless Steel vs. R31233 Cobalt
AISI 201L stainless steel belongs to the iron alloys classification, while R31233 cobalt belongs to the cobalt alloys. They have a modest 26% of their average alloy composition in common, which, by itself, doesn't mean much. 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 AISI 201L stainless steel and the bottom bar is R31233 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 220 |
| Elongation at Break, % | 22 to 46 | |
| 17 |
| Fatigue Strength, MPa | 270 to 530 | |
| 220 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 77 | |
| 85 |
| Tensile Strength: Ultimate (UTS), MPa | 740 to 1040 | |
| 1020 |
| Tensile Strength: Yield (Proof), MPa | 290 to 790 | |
| 420 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 320 |
| Melting Completion (Liquidus), °C | 1410 | |
| 1350 |
| Melting Onset (Solidus), °C | 1370 | |
| 1330 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 440 |
| Thermal Conductivity, W/m-K | 15 | |
| 12 |
| Thermal Expansion, µm/m-K | 17 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.4 | |
| 2.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.9 | |
| 2.1 |
Otherwise Unclassified Properties
| Density, g/cm3 | 7.7 | |
| 8.6 |
| Embodied Carbon, kg CO2/kg material | 2.6 | |
| 8.4 |
| Embodied Energy, MJ/kg | 38 | |
| 110 |
| Embodied Water, L/kg | 140 | |
| 480 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 210 to 300 | |
| 140 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 220 to 1570 | |
| 410 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 23 |
| Strength to Weight: Axial, points | 27 to 37 | |
| 33 |
| Strength to Weight: Bending, points | 24 to 30 | |
| 26 |
| Thermal Diffusivity, mm2/s | 4.0 | |
| 3.2 |
| Thermal Shock Resistance, points | 16 to 23 | |
| 25 |
Alloy Composition
| Boron (B), % | 0 | |
| 0 to 0.015 |
| Carbon (C), % | 0 to 0.030 | |
| 0.020 to 0.1 |
| Chromium (Cr), % | 16 to 18 | |
| 23.5 to 27.5 |
| Cobalt (Co), % | 0 | |
| 44.7 to 63.3 |
| Iron (Fe), % | 67.9 to 75 | |
| 1.0 to 5.0 |
| Manganese (Mn), % | 5.5 to 7.5 | |
| 0.1 to 1.5 |
| Molybdenum (Mo), % | 0 | |
| 4.0 to 6.0 |
| Nickel (Ni), % | 3.5 to 5.5 | |
| 7.0 to 11 |
| Nitrogen (N), % | 0 to 0.25 | |
| 0.030 to 0.12 |
| Phosphorus (P), % | 0 to 0.045 | |
| 0 to 0.030 |
| Silicon (Si), % | 0 to 0.75 | |
| 0.050 to 1.0 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.020 |
| Tungsten (W), % | 0 | |
| 1.0 to 3.0 |