R30155 Cobalt vs. AISI 201L Stainless Steel
Both R30155 cobalt and AISI 201L stainless steel are iron alloys. They have 54% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.
For each property being compared, the top bar is R30155 cobalt and the bottom bar is AISI 201L stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 220 | |
| 190 to 320 |
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 200 |
| Elongation at Break, % | 34 | |
| 22 to 46 |
| Fatigue Strength, MPa | 310 | |
| 270 to 530 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 81 | |
| 77 |
| Shear Strength, MPa | 570 | |
| 520 to 660 |
| Tensile Strength: Ultimate (UTS), MPa | 850 | |
| 740 to 1040 |
| Tensile Strength: Yield (Proof), MPa | 390 | |
| 290 to 790 |
Thermal Properties
| Latent Heat of Fusion, J/g | 300 | |
| 280 |
| Maximum Temperature: Corrosion, °C | 570 | |
| 410 |
| Maximum Temperature: Mechanical, °C | 1100 | |
| 880 |
| Melting Completion (Liquidus), °C | 1470 | |
| 1410 |
| Melting Onset (Solidus), °C | 1420 | |
| 1370 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 480 |
| Thermal Conductivity, W/m-K | 12 | |
| 15 |
| Thermal Expansion, µm/m-K | 14 | |
| 17 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 80 | |
| 12 |
| Density, g/cm3 | 8.5 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 9.7 | |
| 2.6 |
| Embodied Energy, MJ/kg | 150 | |
| 38 |
| Embodied Water, L/kg | 300 | |
| 140 |
Common Calculations
| PREN (Pitting Resistance) | 37 | |
| 19 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 230 | |
| 210 to 300 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 370 | |
| 220 to 1570 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 23 | |
| 25 |
| Strength to Weight: Axial, points | 28 | |
| 27 to 37 |
| Strength to Weight: Bending, points | 24 | |
| 24 to 30 |
| Thermal Diffusivity, mm2/s | 3.2 | |
| 4.0 |
| Thermal Shock Resistance, points | 21 | |
| 16 to 23 |
Alloy Composition
| Carbon (C), % | 0.080 to 0.16 | |
| 0 to 0.030 |
| Chromium (Cr), % | 20 to 22.5 | |
| 16 to 18 |
| Cobalt (Co), % | 18.5 to 21 | |
| 0 |
| Iron (Fe), % | 24.3 to 36.2 | |
| 67.9 to 75 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 5.5 to 7.5 |
| Molybdenum (Mo), % | 2.5 to 3.5 | |
| 0 |
| Nickel (Ni), % | 19 to 21 | |
| 3.5 to 5.5 |
| Niobium (Nb), % | 0.75 to 1.3 | |
| 0 |
| Nitrogen (N), % | 0 to 0.2 | |
| 0 to 0.25 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.045 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 0.75 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.030 |
| Tantalum (Ta), % | 0.75 to 1.3 | |
| 0 |
| Tungsten (W), % | 2.0 to 3.0 | |
| 0 |