R30021 Cobalt vs. EN 1.5414 Steel
R30021 cobalt belongs to the cobalt alloys classification, while EN 1.5414 steel belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.
For each property being compared, the top bar is R30021 cobalt and the bottom bar is EN 1.5414 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 220 | |
| 190 |
| Elongation at Break, % | 9.0 | |
| 22 |
| Fatigue Strength, MPa | 250 | |
| 250 to 270 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 86 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 700 | |
| 550 to 580 |
| Tensile Strength: Yield (Proof), MPa | 500 | |
| 350 to 380 |
Thermal Properties
| Latent Heat of Fusion, J/g | 330 | |
| 250 |
| Melting Completion (Liquidus), °C | 1350 | |
| 1470 |
| Melting Onset (Solidus), °C | 1190 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 470 |
| Thermal Conductivity, W/m-K | 15 | |
| 44 |
| Thermal Expansion, µm/m-K | 11 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.9 | |
| 7.3 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.1 | |
| 8.4 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.4 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 8.0 | |
| 1.6 |
| Embodied Energy, MJ/kg | 110 | |
| 21 |
| Embodied Water, L/kg | 520 | |
| 50 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 57 | |
| 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 570 | |
| 320 to 370 |
| Stiffness to Weight: Axial, points | 15 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 23 | |
| 19 to 20 |
| Strength to Weight: Bending, points | 21 | |
| 19 to 20 |
| Thermal Diffusivity, mm2/s | 3.8 | |
| 12 |
| Thermal Shock Resistance, points | 21 | |
| 16 to 17 |
Alloy Composition
| Carbon (C), % | 0.2 to 0.35 | |
| 0 to 0.2 |
| Chromium (Cr), % | 26 to 29 | |
| 0 to 0.3 |
| Cobalt (Co), % | 61.7 to 67.3 | |
| 0 |
| Copper (Cu), % | 0 | |
| 0 to 0.3 |
| Iron (Fe), % | 0 to 3.0 | |
| 96.4 to 98.7 |
| Manganese (Mn), % | 0 | |
| 0.9 to 1.5 |
| Molybdenum (Mo), % | 4.5 to 6.0 | |
| 0.45 to 0.6 |
| Nickel (Ni), % | 2.0 to 3.0 | |
| 0 to 0.3 |
| Nitrogen (N), % | 0 | |
| 0 to 0.012 |
| Phosphorus (P), % | 0 | |
| 0 to 0.015 |
| Silicon (Si), % | 0 to 1.5 | |
| 0 to 0.4 |
| Sulfur (S), % | 0 | |
| 0 to 0.0050 |