R30816 Cobalt vs. EN 1.5507 Steel
R30816 cobalt belongs to the cobalt alloys classification, while EN 1.5507 steel belongs to the iron alloys. There are 22 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 R30816 cobalt and the bottom bar is EN 1.5507 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 280 | |
| 140 to 260 |
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 190 |
| Poisson's Ratio | 0.3 | |
| 0.29 |
| Reduction in Area, % | 22 | |
| 58 to 72 |
| Shear Modulus, GPa | 81 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 1020 | |
| 450 to 880 |
Thermal Properties
| Latent Heat of Fusion, J/g | 300 | |
| 250 |
| Melting Completion (Liquidus), °C | 1540 | |
| 1460 |
| Melting Onset (Solidus), °C | 1460 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 420 | |
| 470 |
| Thermal Conductivity, W/m-K | 13 | |
| 49 |
| Thermal Expansion, µm/m-K | 12 | |
| 13 |
Otherwise Unclassified Properties
| Density, g/cm3 | 9.1 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 20 | |
| 1.4 |
| Embodied Energy, MJ/kg | 320 | |
| 19 |
| Embodied Water, L/kg | 440 | |
| 49 |
Common Calculations
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 22 | |
| 24 |
| Strength to Weight: Axial, points | 31 | |
| 16 to 31 |
| Strength to Weight: Bending, points | 25 | |
| 17 to 26 |
| Thermal Diffusivity, mm2/s | 3.3 | |
| 13 |
| Thermal Shock Resistance, points | 28 | |
| 13 to 26 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0.020 to 0.080 |
| Boron (B), % | 0 | |
| 0.00080 to 0.0050 |
| Carbon (C), % | 0.32 to 0.42 | |
| 0.21 to 0.25 |
| Chromium (Cr), % | 19 to 21 | |
| 0.25 to 0.35 |
| Cobalt (Co), % | 40 to 49.8 | |
| 0 |
| Copper (Cu), % | 0 | |
| 0 to 0.25 |
| Iron (Fe), % | 0 to 5.0 | |
| 97.8 to 98.7 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 0.8 to 1.0 |
| Molybdenum (Mo), % | 3.5 to 4.5 | |
| 0 |
| Nickel (Ni), % | 19 to 21 | |
| 0 |
| Niobium (Nb), % | 3.5 to 4.5 | |
| 0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.015 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 0.15 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.015 |
| Tantalum (Ta), % | 3.5 to 4.5 | |
| 0 |
| Titanium (Ti), % | 0 | |
| 0 to 0.060 |
| Tungsten (W), % | 3.5 to 4.5 | |
| 0 |