R30035 Cobalt vs. AISI 201 Stainless Steel
R30035 cobalt belongs to the cobalt alloys classification, while AISI 201 stainless steel belongs to the iron alloys. They have a modest 22% of their average alloy composition in common, which, by itself, doesn't mean much. There are 28 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.
For each property being compared, the top bar is R30035 cobalt and the bottom bar is AISI 201 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 220 to 230 | |
| 200 |
| Elongation at Break, % | 9.0 to 46 | |
| 4.6 to 51 |
| Fatigue Strength, MPa | 170 to 740 | |
| 280 to 600 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 84 to 89 | |
| 77 |
| Tensile Strength: Ultimate (UTS), MPa | 900 to 1900 | |
| 650 to 1450 |
| Tensile Strength: Yield (Proof), MPa | 300 to 1650 | |
| 300 to 1080 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 280 |
| Melting Completion (Liquidus), °C | 1440 | |
| 1410 |
| Melting Onset (Solidus), °C | 1320 | |
| 1370 |
| Specific Heat Capacity, J/kg-K | 440 | |
| 480 |
| Thermal Conductivity, W/m-K | 11 | |
| 15 |
| Thermal Expansion, µm/m-K | 13 | |
| 17 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.7 | |
| 2.5 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 1.8 | |
| 2.9 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 100 | |
| 12 |
| Density, g/cm3 | 8.7 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 10 | |
| 2.6 |
| Embodied Energy, MJ/kg | 140 | |
| 38 |
| Embodied Water, L/kg | 410 | |
| 140 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 160 to 320 | |
| 61 to 340 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 210 to 5920 | |
| 230 to 2970 |
| Stiffness to Weight: Axial, points | 14 to 15 | |
| 14 |
| Stiffness to Weight: Bending, points | 23 to 24 | |
| 25 |
| Strength to Weight: Axial, points | 29 to 61 | |
| 23 to 52 |
| Strength to Weight: Bending, points | 24 to 39 | |
| 22 to 37 |
| Thermal Diffusivity, mm2/s | 3.0 | |
| 4.0 |
| Thermal Shock Resistance, points | 23 to 46 | |
| 14 to 32 |
Alloy Composition
| Boron (B), % | 0 to 0.015 | |
| 0 |
| Carbon (C), % | 0 to 0.025 | |
| 0 to 0.15 |
| Chromium (Cr), % | 19 to 21 | |
| 16 to 18 |
| Cobalt (Co), % | 29.1 to 39 | |
| 0 |
| Iron (Fe), % | 0 to 1.0 | |
| 67.5 to 75 |
| Manganese (Mn), % | 0 to 0.15 | |
| 5.5 to 7.5 |
| Molybdenum (Mo), % | 9.0 to 10.5 | |
| 0 |
| Nickel (Ni), % | 33 to 37 | |
| 3.5 to 5.5 |
| Nitrogen (N), % | 0 | |
| 0 to 0.25 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.060 |
| Silicon (Si), % | 0 to 0.15 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 to 0.030 |
| Titanium (Ti), % | 0 to 1.0 | |
| 0 |