S66286 Stainless Steel vs. R30816 Cobalt
S66286 stainless steel belongs to the iron alloys classification, while R30816 cobalt belongs to the cobalt alloys. They have 40% of their average alloy composition in common. 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 S66286 stainless steel and the bottom bar is R30816 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 210 |
| Elongation at Break, % | 17 to 40 | |
| 23 |
| Fatigue Strength, MPa | 240 to 410 | |
| 250 |
| Poisson's Ratio | 0.29 | |
| 0.3 |
| Shear Modulus, GPa | 75 | |
| 81 |
| Tensile Strength: Ultimate (UTS), MPa | 620 to 1020 | |
| 1020 |
| Tensile Strength: Yield (Proof), MPa | 280 to 670 | |
| 460 |
Thermal Properties
| Latent Heat of Fusion, J/g | 300 | |
| 300 |
| Melting Completion (Liquidus), °C | 1430 | |
| 1540 |
| Melting Onset (Solidus), °C | 1370 | |
| 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 | 6.0 | |
| 20 |
| Embodied Energy, MJ/kg | 87 | |
| 320 |
| Embodied Water, L/kg | 170 | |
| 440 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 150 to 200 | |
| 190 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 190 to 1150 | |
| 510 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 22 |
| Strength to Weight: Axial, points | 22 to 36 | |
| 31 |
| Strength to Weight: Bending, points | 20 to 28 | |
| 25 |
| Thermal Diffusivity, mm2/s | 4.0 | |
| 3.3 |
| Thermal Shock Resistance, points | 13 to 22 | |
| 28 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.35 | |
| 0 |
| Boron (B), % | 0.0010 to 0.010 | |
| 0 |
| Carbon (C), % | 0 to 0.080 | |
| 0.32 to 0.42 |
| Chromium (Cr), % | 13.5 to 16 | |
| 19 to 21 |
| Cobalt (Co), % | 0 | |
| 40 to 49.8 |
| Iron (Fe), % | 49.1 to 59.5 | |
| 0 to 5.0 |
| Manganese (Mn), % | 0 to 2.0 | |
| 1.0 to 2.0 |
| Molybdenum (Mo), % | 1.0 to 1.5 | |
| 3.5 to 4.5 |
| Nickel (Ni), % | 24 to 27 | |
| 19 to 21 |
| Niobium (Nb), % | 0 | |
| 3.5 to 4.5 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.030 |
| Tantalum (Ta), % | 0 | |
| 3.5 to 4.5 |
| Titanium (Ti), % | 1.9 to 2.4 | |
| 0 |
| Tungsten (W), % | 0 | |
| 3.5 to 4.5 |
| Vanadium (V), % | 0.1 to 0.5 | |
| 0 |