R30816 Cobalt vs. AISI 202 Stainless Steel
R30816 cobalt belongs to the cobalt alloys classification, while AISI 202 stainless steel belongs to the iron alloys. They have a modest 28% 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 R30816 cobalt and the bottom bar is AISI 202 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 280 | |
| 210 to 300 |
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 200 |
| Elongation at Break, % | 23 | |
| 14 to 45 |
| Fatigue Strength, MPa | 250 | |
| 290 to 330 |
| Poisson's Ratio | 0.3 | |
| 0.28 |
| Shear Modulus, GPa | 81 | |
| 77 |
| Tensile Strength: Ultimate (UTS), MPa | 1020 | |
| 700 to 980 |
| Tensile Strength: Yield (Proof), MPa | 460 | |
| 310 to 580 |
Thermal Properties
| Latent Heat of Fusion, J/g | 300 | |
| 290 |
| Melting Completion (Liquidus), °C | 1540 | |
| 1400 |
| Melting Onset (Solidus), °C | 1460 | |
| 1360 |
| Specific Heat Capacity, J/kg-K | 420 | |
| 480 |
| Thermal Conductivity, W/m-K | 13 | |
| 15 |
| Thermal Expansion, µm/m-K | 12 | |
| 17 |
Otherwise Unclassified Properties
| Density, g/cm3 | 9.1 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 20 | |
| 2.8 |
| Embodied Energy, MJ/kg | 320 | |
| 40 |
| Embodied Water, L/kg | 440 | |
| 150 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 190 | |
| 120 to 260 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 510 | |
| 250 to 840 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 22 | |
| 25 |
| Strength to Weight: Axial, points | 31 | |
| 25 to 35 |
| Strength to Weight: Bending, points | 25 | |
| 23 to 29 |
| Thermal Diffusivity, mm2/s | 3.3 | |
| 4.0 |
| Thermal Shock Resistance, points | 28 | |
| 15 to 21 |
Alloy Composition
| Carbon (C), % | 0.32 to 0.42 | |
| 0 to 0.15 |
| Chromium (Cr), % | 19 to 21 | |
| 17 to 19 |
| Cobalt (Co), % | 40 to 49.8 | |
| 0 |
| Iron (Fe), % | 0 to 5.0 | |
| 63.5 to 71.5 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 7.5 to 10 |
| Molybdenum (Mo), % | 3.5 to 4.5 | |
| 0 |
| Nickel (Ni), % | 19 to 21 | |
| 4.0 to 6.0 |
| Niobium (Nb), % | 3.5 to 4.5 | |
| 0 |
| Nitrogen (N), % | 0 | |
| 0 to 0.25 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.060 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.030 |
| Tantalum (Ta), % | 3.5 to 4.5 | |
| 0 |
| Tungsten (W), % | 3.5 to 4.5 | |
| 0 |