EN 1.4571 Stainless Steel vs. R30816 Cobalt
EN 1.4571 stainless steel belongs to the iron alloys classification, while R30816 cobalt belongs to the cobalt alloys. They have a modest 36% of their average alloy composition in common, which, by itself, doesn't mean much. There are 26 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.
For each property being compared, the top bar is EN 1.4571 stainless steel and the bottom bar is R30816 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 190 to 270 | |
| 280 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 210 |
| Elongation at Break, % | 14 to 40 | |
| 23 |
| Fatigue Strength, MPa | 200 to 330 | |
| 250 |
| Poisson's Ratio | 0.28 | |
| 0.3 |
| Shear Modulus, GPa | 78 | |
| 81 |
| Tensile Strength: Ultimate (UTS), MPa | 600 to 900 | |
| 1020 |
| Tensile Strength: Yield (Proof), MPa | 230 to 570 | |
| 460 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 300 |
| Melting Completion (Liquidus), °C | 1440 | |
| 1540 |
| Melting Onset (Solidus), °C | 1400 | |
| 1460 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 420 |
| Thermal Conductivity, W/m-K | 15 | |
| 13 |
| Thermal Expansion, µm/m-K | 17 | |
| 12 |
Otherwise Unclassified Properties
| Density, g/cm3 | 7.9 | |
| 9.1 |
| Embodied Carbon, kg CO2/kg material | 3.9 | |
| 20 |
| Embodied Energy, MJ/kg | 54 | |
| 320 |
| Embodied Water, L/kg | 150 | |
| 440 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 110 to 190 | |
| 190 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 130 to 820 | |
| 510 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 22 |
| Strength to Weight: Axial, points | 21 to 32 | |
| 31 |
| Strength to Weight: Bending, points | 20 to 26 | |
| 25 |
| Thermal Diffusivity, mm2/s | 4.0 | |
| 3.3 |
| Thermal Shock Resistance, points | 13 to 20 | |
| 28 |
Alloy Composition
| Carbon (C), % | 0 to 0.080 | |
| 0.32 to 0.42 |
| Chromium (Cr), % | 16.5 to 18.5 | |
| 19 to 21 |
| Cobalt (Co), % | 0 | |
| 40 to 49.8 |
| Iron (Fe), % | 61.7 to 71 | |
| 0 to 5.0 |
| Manganese (Mn), % | 0 to 2.0 | |
| 1.0 to 2.0 |
| Molybdenum (Mo), % | 2.0 to 2.5 | |
| 3.5 to 4.5 |
| Nickel (Ni), % | 10.5 to 13.5 | |
| 19 to 21 |
| Niobium (Nb), % | 0 | |
| 3.5 to 4.5 |
| Phosphorus (P), % | 0 to 0.045 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.030 |
| Tantalum (Ta), % | 0 | |
| 3.5 to 4.5 |
| Titanium (Ti), % | 0 to 0.7 | |
| 0 |
| Tungsten (W), % | 0 | |
| 3.5 to 4.5 |