R30003 Cobalt vs. S20910 Stainless Steel
R30003 cobalt belongs to the cobalt alloys classification, while S20910 stainless steel belongs to the iron alloys. They have 52% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.
For each property being compared, the top bar is R30003 cobalt and the bottom bar is S20910 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 200 |
| Elongation at Break, % | 10 to 73 | |
| 14 to 39 |
| Fatigue Strength, MPa | 320 to 560 | |
| 310 to 460 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 83 | |
| 79 |
| Tensile Strength: Ultimate (UTS), MPa | 970 to 1720 | |
| 780 to 940 |
| Tensile Strength: Yield (Proof), MPa | 510 to 1090 | |
| 430 to 810 |
Thermal Properties
| Latent Heat of Fusion, J/g | 310 | |
| 300 |
| Melting Completion (Liquidus), °C | 1400 | |
| 1420 |
| Melting Onset (Solidus), °C | 1440 | |
| 1380 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 480 |
| Thermal Conductivity, W/m-K | 13 | |
| 13 |
| Thermal Expansion, µm/m-K | 13 | |
| 16 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 95 | |
| 22 |
| Density, g/cm3 | 8.4 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 8.0 | |
| 4.8 |
| Embodied Energy, MJ/kg | 110 | |
| 68 |
| Embodied Water, L/kg | 400 | |
| 180 |
Common Calculations
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 600 to 2790 | |
| 460 to 1640 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 | |
| 25 |
| Strength to Weight: Axial, points | 32 to 57 | |
| 28 to 33 |
| Strength to Weight: Bending, points | 26 to 38 | |
| 24 to 27 |
| Thermal Diffusivity, mm2/s | 3.3 | |
| 3.6 |
| Thermal Shock Resistance, points | 26 to 45 | |
| 17 to 21 |
Alloy Composition
| Boron (B), % | 0 to 0.1 | |
| 0 |
| Carbon (C), % | 0 to 0.15 | |
| 0 to 0.060 |
| Chromium (Cr), % | 19 to 21 | |
| 20.5 to 23.5 |
| Cobalt (Co), % | 39 to 41 | |
| 0 |
| Iron (Fe), % | 10 to 20.5 | |
| 52.1 to 62.1 |
| Manganese (Mn), % | 1.5 to 2.5 | |
| 4.0 to 6.0 |
| Molybdenum (Mo), % | 6.0 to 8.0 | |
| 1.5 to 3.0 |
| Nickel (Ni), % | 14 to 16 | |
| 11.5 to 13.5 |
| Niobium (Nb), % | 0 | |
| 0.1 to 0.3 |
| Nitrogen (N), % | 0 | |
| 0.2 to 0.4 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 1.2 | |
| 0 to 0.75 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.030 |
| Vanadium (V), % | 0 | |
| 0.1 to 0.3 |