Hot Rolled EN 1.4424 vs. Hot Worked R31537 Cobalt
Hot rolled EN 1.4424 belongs to the iron alloys classification, while hot worked R31537 cobalt belongs to the cobalt alloys. They have a modest 23% 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 (9, in this case) are not shown.
For each property being compared, the top bar is hot rolled EN 1.4424 and the bottom bar is hot worked R31537 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 220 |
| Elongation at Break, % | 28 | |
| 14 |
| Fatigue Strength, MPa | 350 | |
| 400 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 78 | |
| 87 |
| Tensile Strength: Ultimate (UTS), MPa | 800 | |
| 1140 |
| Tensile Strength: Yield (Proof), MPa | 480 | |
| 780 |
Thermal Properties
| Latent Heat of Fusion, J/g | 310 | |
| 320 |
| Melting Completion (Liquidus), °C | 1430 | |
| 1360 |
| Melting Onset (Solidus), °C | 1390 | |
| 1290 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 450 |
| Thermal Conductivity, W/m-K | 13 | |
| 13 |
| Thermal Expansion, µm/m-K | 12 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.2 | |
| 2.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.5 | |
| 2.1 |
Otherwise Unclassified Properties
| Density, g/cm3 | 7.7 | |
| 8.4 |
| Embodied Carbon, kg CO2/kg material | 3.4 | |
| 8.1 |
| Embodied Energy, MJ/kg | 46 | |
| 110 |
| Embodied Water, L/kg | 140 | |
| 530 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 190 | |
| 140 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 580 | |
| 1380 |
| Stiffness to Weight: Axial, points | 14 | |
| 15 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 29 | |
| 38 |
| Strength to Weight: Bending, points | 25 | |
| 29 |
| Thermal Diffusivity, mm2/s | 3.5 | |
| 3.4 |
| Thermal Shock Resistance, points | 23 | |
| 28 |
Alloy Composition
| Carbon (C), % | 0 to 0.030 | |
| 0 to 0.14 |
| Chromium (Cr), % | 18 to 19 | |
| 26 to 30 |
| Cobalt (Co), % | 0 | |
| 58.9 to 69 |
| Iron (Fe), % | 68.6 to 72.4 | |
| 0 to 0.75 |
| Manganese (Mn), % | 1.2 to 2.0 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 2.5 to 3.0 | |
| 5.0 to 7.0 |
| Nickel (Ni), % | 4.5 to 5.2 | |
| 0 to 1.0 |
| Nitrogen (N), % | 0.050 to 0.1 | |
| 0 to 0.25 |
| Phosphorus (P), % | 0 to 0.035 | |
| 0 |
| Silicon (Si), % | 1.4 to 2.0 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 |