R30816 Cobalt vs. EN 1.5662 Steel
R30816 cobalt belongs to the cobalt alloys classification, while EN 1.5662 steel belongs to the iron alloys. There are 25 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 R30816 cobalt and the bottom bar is EN 1.5662 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 280 | |
| 220 to 230 |
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 190 |
| Elongation at Break, % | 23 | |
| 20 |
| Fatigue Strength, MPa | 250 | |
| 380 to 450 |
| Poisson's Ratio | 0.3 | |
| 0.29 |
| Reduction in Area, % | 22 | |
| 56 to 57 |
| Shear Modulus, GPa | 81 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 1020 | |
| 740 to 750 |
| Tensile Strength: Yield (Proof), MPa | 460 | |
| 550 to 660 |
Thermal Properties
| Latent Heat of Fusion, J/g | 300 | |
| 250 |
| Melting Completion (Liquidus), °C | 1540 | |
| 1460 |
| Melting Onset (Solidus), °C | 1460 | |
| 1410 |
| Specific Heat Capacity, J/kg-K | 420 | |
| 470 |
| Thermal Expansion, µm/m-K | 12 | |
| 13 |
Otherwise Unclassified Properties
| Density, g/cm3 | 9.1 | |
| 8.0 |
| Embodied Carbon, kg CO2/kg material | 20 | |
| 2.3 |
| Embodied Energy, MJ/kg | 320 | |
| 31 |
| Embodied Water, L/kg | 440 | |
| 63 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 190 | |
| 140 to 150 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 510 | |
| 810 to 1150 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 22 | |
| 24 |
| Strength to Weight: Axial, points | 31 | |
| 26 |
| Strength to Weight: Bending, points | 25 | |
| 23 |
| Thermal Shock Resistance, points | 28 | |
| 22 |
Alloy Composition
| Carbon (C), % | 0.32 to 0.42 | |
| 0 to 0.1 |
| Chromium (Cr), % | 19 to 21 | |
| 0 |
| Cobalt (Co), % | 40 to 49.8 | |
| 0 |
| Iron (Fe), % | 0 to 5.0 | |
| 88.6 to 91.2 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 0.3 to 0.8 |
| Molybdenum (Mo), % | 3.5 to 4.5 | |
| 0 to 0.1 |
| Nickel (Ni), % | 19 to 21 | |
| 8.5 to 10 |
| Niobium (Nb), % | 3.5 to 4.5 | |
| 0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.020 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 0.35 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.0050 |
| Tantalum (Ta), % | 3.5 to 4.5 | |
| 0 |
| Tungsten (W), % | 3.5 to 4.5 | |
| 0 |
| Vanadium (V), % | 0 | |
| 0 to 0.050 |