R31539 Cobalt vs. EN 1.4482 Stainless Steel
R31539 cobalt belongs to the cobalt alloys classification, while EN 1.4482 stainless steel belongs to the iron 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 (7, in this case) are not shown.
For each property being compared, the top bar is R31539 cobalt and the bottom bar is EN 1.4482 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 220 | |
| 200 |
| Elongation at Break, % | 13 to 22 | |
| 34 |
| Fatigue Strength, MPa | 310 to 480 | |
| 420 to 450 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 86 | |
| 78 |
| Tensile Strength: Ultimate (UTS), MPa | 1000 to 1340 | |
| 770 to 800 |
| Tensile Strength: Yield (Proof), MPa | 590 to 940 | |
| 530 to 570 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 290 |
| Melting Completion (Liquidus), °C | 1360 | |
| 1420 |
| Melting Onset (Solidus), °C | 1290 | |
| 1370 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 480 |
| Thermal Conductivity, W/m-K | 13 | |
| 15 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.0 | |
| 2.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.1 | |
| 2.6 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.4 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 8.2 | |
| 2.7 |
| Embodied Energy, MJ/kg | 110 | |
| 38 |
| Embodied Water, L/kg | 530 | |
| 150 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 140 to 190 | |
| 230 to 250 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 780 to 2000 | |
| 690 to 820 |
| Stiffness to Weight: Axial, points | 15 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 | |
| 25 |
| Strength to Weight: Axial, points | 33 to 44 | |
| 28 to 29 |
| Strength to Weight: Bending, points | 27 to 32 | |
| 24 to 25 |
| Thermal Diffusivity, mm2/s | 3.5 | |
| 4.0 |
| Thermal Shock Resistance, points | 24 to 32 | |
| 21 to 22 |
Alloy Composition
| Aluminum (Al), % | 0.3 to 1.0 | |
| 0 |
| Carbon (C), % | 0 to 0.14 | |
| 0 to 0.030 |
| Chromium (Cr), % | 26 to 30 | |
| 19.5 to 21.5 |
| Cobalt (Co), % | 57.7 to 68.7 | |
| 0 |
| Copper (Cu), % | 0 | |
| 0 to 1.0 |
| Iron (Fe), % | 0 to 0.75 | |
| 66.1 to 74.9 |
| Lanthanum (La), % | 0.030 to 0.2 | |
| 0 |
| Manganese (Mn), % | 0 to 1.0 | |
| 4.0 to 6.0 |
| Molybdenum (Mo), % | 5.0 to 7.0 | |
| 0.1 to 0.6 |
| Nickel (Ni), % | 0 to 1.0 | |
| 1.5 to 3.5 |
| Nitrogen (N), % | 0 to 0.25 | |
| 0.050 to 0.2 |
| Phosphorus (P), % | 0 | |
| 0 to 0.035 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 | |
| 0 to 0.030 |