R30035 Cobalt vs. EN 1.7703 Steel
R30035 cobalt belongs to the cobalt alloys classification, while EN 1.7703 steel belongs to the iron alloys. There are 28 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.
For each property being compared, the top bar is R30035 cobalt and the bottom bar is EN 1.7703 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 220 to 230 | |
| 190 |
| Elongation at Break, % | 9.0 to 46 | |
| 20 |
| Fatigue Strength, MPa | 170 to 740 | |
| 320 to 340 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 84 to 89 | |
| 74 |
| Tensile Strength: Ultimate (UTS), MPa | 900 to 1900 | |
| 670 to 690 |
| Tensile Strength: Yield (Proof), MPa | 300 to 1650 | |
| 460 to 500 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 250 |
| Melting Completion (Liquidus), °C | 1440 | |
| 1470 |
| Melting Onset (Solidus), °C | 1320 | |
| 1430 |
| 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 | |
| 7.6 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 1.8 | |
| 8.7 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 100 | |
| 4.2 |
| Density, g/cm3 | 8.7 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 10 | |
| 2.5 |
| Embodied Energy, MJ/kg | 140 | |
| 35 |
| Embodied Water, L/kg | 410 | |
| 61 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 160 to 320 | |
| 120 to 130 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 210 to 5920 | |
| 570 to 650 |
| 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 | |
| 24 |
| Strength to Weight: Bending, points | 24 to 39 | |
| 22 |
| Thermal Diffusivity, mm2/s | 3.0 | |
| 11 |
| Thermal Shock Resistance, points | 23 to 46 | |
| 19 to 20 |
Alloy Composition
| Boron (B), % | 0 to 0.015 | |
| 0 |
| Carbon (C), % | 0 to 0.025 | |
| 0.11 to 0.15 |
| Chromium (Cr), % | 19 to 21 | |
| 2.0 to 2.5 |
| Cobalt (Co), % | 29.1 to 39 | |
| 0 |
| Copper (Cu), % | 0 | |
| 0 to 0.2 |
| Iron (Fe), % | 0 to 1.0 | |
| 94.6 to 96.4 |
| Manganese (Mn), % | 0 to 0.15 | |
| 0.3 to 0.6 |
| Molybdenum (Mo), % | 9.0 to 10.5 | |
| 0.9 to 1.1 |
| Nickel (Ni), % | 33 to 37 | |
| 0 to 0.25 |
| Niobium (Nb), % | 0 | |
| 0 to 0.070 |
| Nitrogen (N), % | 0 | |
| 0 to 0.012 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.015 |
| Silicon (Si), % | 0 to 0.15 | |
| 0 to 0.1 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 to 0.0050 |
| Titanium (Ti), % | 0 to 1.0 | |
| 0 to 0.030 |
| Vanadium (V), % | 0 | |
| 0.25 to 0.35 |