R30035 Cobalt vs. EN 1.6579 Steel
R30035 cobalt belongs to the cobalt alloys classification, while EN 1.6579 steel belongs to the iron alloys. There are 28 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.
For each property being compared, the top bar is R30035 cobalt and the bottom bar is EN 1.6579 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 220 to 230 | |
| 190 |
| Elongation at Break, % | 9.0 to 46 | |
| 11 to 14 |
| Fatigue Strength, MPa | 170 to 740 | |
| 380 to 570 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 84 to 89 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 900 to 1900 | |
| 850 to 980 |
| Tensile Strength: Yield (Proof), MPa | 300 to 1650 | |
| 600 to 910 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 250 |
| Melting Completion (Liquidus), °C | 1440 | |
| 1460 |
| Melting Onset (Solidus), °C | 1320 | |
| 1410 |
| Specific Heat Capacity, J/kg-K | 440 | |
| 470 |
| Thermal Conductivity, W/m-K | 11 | |
| 39 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.7 | |
| 7.7 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 1.8 | |
| 8.8 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 100 | |
| 3.7 |
| Density, g/cm3 | 8.7 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 10 | |
| 1.7 |
| Embodied Energy, MJ/kg | 140 | |
| 22 |
| Embodied Water, L/kg | 410 | |
| 56 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 160 to 320 | |
| 100 to 120 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 210 to 5920 | |
| 950 to 2210 |
| Stiffness to Weight: Axial, points | 14 to 15 | |
| 13 |
| Stiffness to Weight: Bending, points | 23 to 24 | |
| 24 |
| Strength to Weight: Axial, points | 29 to 61 | |
| 30 to 35 |
| Strength to Weight: Bending, points | 24 to 39 | |
| 25 to 28 |
| Thermal Diffusivity, mm2/s | 3.0 | |
| 11 |
| Thermal Shock Resistance, points | 23 to 46 | |
| 25 to 29 |
Alloy Composition
| Boron (B), % | 0 to 0.015 | |
| 0 |
| Carbon (C), % | 0 to 0.025 | |
| 0.32 to 0.38 |
| Chromium (Cr), % | 19 to 21 | |
| 1.4 to 1.7 |
| Cobalt (Co), % | 29.1 to 39 | |
| 0 |
| Iron (Fe), % | 0 to 1.0 | |
| 94.2 to 96.1 |
| Manganese (Mn), % | 0 to 0.15 | |
| 0.6 to 1.0 |
| Molybdenum (Mo), % | 9.0 to 10.5 | |
| 0.15 to 0.35 |
| Nickel (Ni), % | 33 to 37 | |
| 1.4 to 1.7 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 to 0.15 | |
| 0 to 0.6 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 to 0.030 |
| Titanium (Ti), % | 0 to 1.0 | |
| 0 |