R30021 Cobalt vs. EN 1.4962 Stainless Steel
R30021 cobalt belongs to the cobalt alloys classification, while EN 1.4962 stainless steel belongs to the iron alloys. They have a modest 21% of their average alloy composition in common, which, by itself, doesn't mean much. There are 27 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 R30021 cobalt and the bottom bar is EN 1.4962 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 220 | |
| 200 |
| Elongation at Break, % | 9.0 | |
| 22 to 34 |
| Fatigue Strength, MPa | 250 | |
| 210 to 330 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 86 | |
| 77 |
| Tensile Strength: Ultimate (UTS), MPa | 700 | |
| 630 to 690 |
| Tensile Strength: Yield (Proof), MPa | 500 | |
| 260 to 490 |
Thermal Properties
| Latent Heat of Fusion, J/g | 330 | |
| 280 |
| Melting Completion (Liquidus), °C | 1350 | |
| 1480 |
| Melting Onset (Solidus), °C | 1190 | |
| 1440 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 470 |
| Thermal Conductivity, W/m-K | 15 | |
| 14 |
| Thermal Expansion, µm/m-K | 11 | |
| 16 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.9 | |
| 2.3 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.1 | |
| 2.6 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.4 | |
| 8.1 |
| Embodied Carbon, kg CO2/kg material | 8.0 | |
| 4.1 |
| Embodied Energy, MJ/kg | 110 | |
| 59 |
| Embodied Water, L/kg | 520 | |
| 150 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 57 | |
| 140 to 170 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 570 | |
| 170 to 610 |
| Stiffness to Weight: Axial, points | 15 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 23 | |
| 21 to 24 |
| Strength to Weight: Bending, points | 21 | |
| 20 to 21 |
| Thermal Diffusivity, mm2/s | 3.8 | |
| 3.7 |
| Thermal Shock Resistance, points | 21 | |
| 14 to 16 |
Alloy Composition
| Boron (B), % | 0 | |
| 0.0015 to 0.0060 |
| Carbon (C), % | 0.2 to 0.35 | |
| 0.070 to 0.15 |
| Chromium (Cr), % | 26 to 29 | |
| 15.5 to 17.5 |
| Cobalt (Co), % | 61.7 to 67.3 | |
| 0 |
| Iron (Fe), % | 0 to 3.0 | |
| 62.1 to 69 |
| Manganese (Mn), % | 0 | |
| 0 to 1.5 |
| Molybdenum (Mo), % | 4.5 to 6.0 | |
| 0 |
| Nickel (Ni), % | 2.0 to 3.0 | |
| 12.5 to 14.5 |
| Phosphorus (P), % | 0 | |
| 0 to 0.035 |
| Silicon (Si), % | 0 to 1.5 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 | |
| 0 to 0.015 |
| Titanium (Ti), % | 0 | |
| 0.4 to 0.7 |
| Tungsten (W), % | 0 | |
| 2.5 to 3.0 |