EN 1.4662 Stainless Steel vs. R30816 Cobalt
EN 1.4662 stainless steel belongs to the iron alloys classification, while R30816 cobalt belongs to the cobalt alloys. They have a modest 30% of their average alloy composition in common, which, by itself, doesn't mean much. There are 25 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 EN 1.4662 stainless steel and the bottom bar is R30816 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 210 |
| Elongation at Break, % | 28 | |
| 23 |
| Fatigue Strength, MPa | 430 to 450 | |
| 250 |
| Poisson's Ratio | 0.27 | |
| 0.3 |
| Shear Modulus, GPa | 79 | |
| 81 |
| Tensile Strength: Ultimate (UTS), MPa | 810 to 830 | |
| 1020 |
| Tensile Strength: Yield (Proof), MPa | 580 to 620 | |
| 460 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 300 |
| Melting Completion (Liquidus), °C | 1430 | |
| 1540 |
| Melting Onset (Solidus), °C | 1380 | |
| 1460 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 420 |
| Thermal Conductivity, W/m-K | 15 | |
| 13 |
| Thermal Expansion, µm/m-K | 13 | |
| 12 |
Otherwise Unclassified Properties
| Density, g/cm3 | 7.7 | |
| 9.1 |
| Embodied Carbon, kg CO2/kg material | 3.2 | |
| 20 |
| Embodied Energy, MJ/kg | 45 | |
| 320 |
| Embodied Water, L/kg | 170 | |
| 440 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 210 | |
| 190 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 840 to 940 | |
| 510 |
| Stiffness to Weight: Axial, points | 15 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 22 |
| Strength to Weight: Axial, points | 29 to 30 | |
| 31 |
| Strength to Weight: Bending, points | 25 | |
| 25 |
| Thermal Diffusivity, mm2/s | 3.9 | |
| 3.3 |
| Thermal Shock Resistance, points | 22 | |
| 28 |
Alloy Composition
| Carbon (C), % | 0 to 0.030 | |
| 0.32 to 0.42 |
| Chromium (Cr), % | 23 to 25 | |
| 19 to 21 |
| Cobalt (Co), % | 0 | |
| 40 to 49.8 |
| Copper (Cu), % | 0.1 to 0.8 | |
| 0 |
| Iron (Fe), % | 62.6 to 70.2 | |
| 0 to 5.0 |
| Manganese (Mn), % | 2.5 to 4.0 | |
| 1.0 to 2.0 |
| Molybdenum (Mo), % | 1.0 to 2.0 | |
| 3.5 to 4.5 |
| Nickel (Ni), % | 3.0 to 4.5 | |
| 19 to 21 |
| Niobium (Nb), % | 0 | |
| 3.5 to 4.5 |
| Nitrogen (N), % | 0.2 to 0.3 | |
| 0 |
| Phosphorus (P), % | 0 to 0.035 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 0.7 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.0050 | |
| 0 to 0.030 |
| Tantalum (Ta), % | 0 | |
| 3.5 to 4.5 |
| Tungsten (W), % | 0 | |
| 3.5 to 4.5 |