S36200 Stainless Steel vs. R30816 Cobalt
S36200 stainless steel belongs to the iron alloys classification, while R30816 cobalt belongs to the cobalt alloys. They have a modest 24% 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 (10, in this case) are not shown.
For each property being compared, the top bar is S36200 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, % | 3.4 to 4.6 | |
| 23 |
| Fatigue Strength, MPa | 450 to 570 | |
| 250 |
| Poisson's Ratio | 0.28 | |
| 0.3 |
| Shear Modulus, GPa | 76 | |
| 81 |
| Tensile Strength: Ultimate (UTS), MPa | 1180 to 1410 | |
| 1020 |
| Tensile Strength: Yield (Proof), MPa | 960 to 1240 | |
| 460 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 300 |
| Melting Completion (Liquidus), °C | 1440 | |
| 1540 |
| Melting Onset (Solidus), °C | 1400 | |
| 1460 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 420 |
| Thermal Conductivity, W/m-K | 16 | |
| 13 |
| Thermal Expansion, µm/m-K | 11 | |
| 12 |
Otherwise Unclassified Properties
| Density, g/cm3 | 7.8 | |
| 9.1 |
| Embodied Carbon, kg CO2/kg material | 2.8 | |
| 20 |
| Embodied Energy, MJ/kg | 40 | |
| 320 |
| Embodied Water, L/kg | 120 | |
| 440 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 46 to 51 | |
| 190 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 2380 to 3930 | |
| 510 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 22 |
| Strength to Weight: Axial, points | 42 to 50 | |
| 31 |
| Strength to Weight: Bending, points | 32 to 36 | |
| 25 |
| Thermal Diffusivity, mm2/s | 4.3 | |
| 3.3 |
| Thermal Shock Resistance, points | 40 to 48 | |
| 28 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.1 | |
| 0 |
| Carbon (C), % | 0 to 0.050 | |
| 0.32 to 0.42 |
| Chromium (Cr), % | 14 to 14.5 | |
| 19 to 21 |
| Cobalt (Co), % | 0 | |
| 40 to 49.8 |
| Iron (Fe), % | 75.4 to 79.5 | |
| 0 to 5.0 |
| Manganese (Mn), % | 0 to 0.5 | |
| 1.0 to 2.0 |
| Molybdenum (Mo), % | 0 to 0.3 | |
| 3.5 to 4.5 |
| Nickel (Ni), % | 6.5 to 7.0 | |
| 19 to 21 |
| Niobium (Nb), % | 0 | |
| 3.5 to 4.5 |
| Phosphorus (P), % | 0 to 0.030 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 0.3 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.030 |
| Tantalum (Ta), % | 0 | |
| 3.5 to 4.5 |
| Titanium (Ti), % | 0.6 to 0.9 | |
| 0 |
| Tungsten (W), % | 0 | |
| 3.5 to 4.5 |