R30155 Cobalt vs. N08020 Stainless Steel
Both R30155 cobalt and N08020 stainless steel are iron alloys. They have 75% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.
For each property being compared, the top bar is R30155 cobalt and the bottom bar is N08020 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 200 |
| Elongation at Break, % | 34 | |
| 15 to 34 |
| Fatigue Strength, MPa | 310 | |
| 210 to 240 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 81 | |
| 77 |
| Shear Strength, MPa | 570 | |
| 380 to 410 |
| Tensile Strength: Ultimate (UTS), MPa | 850 | |
| 610 to 620 |
| Tensile Strength: Yield (Proof), MPa | 390 | |
| 270 to 420 |
Thermal Properties
| Latent Heat of Fusion, J/g | 300 | |
| 300 |
| Maximum Temperature: Corrosion, °C | 570 | |
| 490 |
| Maximum Temperature: Mechanical, °C | 1100 | |
| 1100 |
| Melting Completion (Liquidus), °C | 1470 | |
| 1410 |
| Melting Onset (Solidus), °C | 1420 | |
| 1360 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 460 |
| Thermal Conductivity, W/m-K | 12 | |
| 12 |
| Thermal Expansion, µm/m-K | 14 | |
| 15 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 80 | |
| 38 |
| Density, g/cm3 | 8.5 | |
| 8.2 |
| Embodied Carbon, kg CO2/kg material | 9.7 | |
| 6.6 |
| Embodied Energy, MJ/kg | 150 | |
| 92 |
| Embodied Water, L/kg | 300 | |
| 220 |
Common Calculations
| PREN (Pitting Resistance) | 37 | |
| 28 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 230 | |
| 83 to 170 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 370 | |
| 180 to 440 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 23 | |
| 24 |
| Strength to Weight: Axial, points | 28 | |
| 21 |
| Strength to Weight: Bending, points | 24 | |
| 20 |
| Thermal Diffusivity, mm2/s | 3.2 | |
| 3.2 |
| Thermal Shock Resistance, points | 21 | |
| 15 |
Alloy Composition
| Carbon (C), % | 0.080 to 0.16 | |
| 0 to 0.070 |
| Chromium (Cr), % | 20 to 22.5 | |
| 19 to 21 |
| Cobalt (Co), % | 18.5 to 21 | |
| 0 |
| Copper (Cu), % | 0 | |
| 3.0 to 4.0 |
| Iron (Fe), % | 24.3 to 36.2 | |
| 29.9 to 44 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 0 to 2.0 |
| Molybdenum (Mo), % | 2.5 to 3.5 | |
| 2.0 to 3.0 |
| Nickel (Ni), % | 19 to 21 | |
| 32 to 38 |
| Niobium (Nb), % | 0.75 to 1.3 | |
| 0 to 1.0 |
| Nitrogen (N), % | 0 to 0.2 | |
| 0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.045 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.035 |
| Tantalum (Ta), % | 0.75 to 1.3 | |
| 0 |
| Tungsten (W), % | 2.0 to 3.0 | |
| 0 |