G-CoCr28 Cobalt vs. EN 1.7710 Steel
G-CoCr28 cobalt belongs to the cobalt alloys classification, while EN 1.7710 steel belongs to the iron alloys. They have a modest 20% of their average alloy composition in common, which, by itself, doesn't mean much. There are 27 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 G-CoCr28 cobalt and the bottom bar is EN 1.7710 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 190 |
| Elongation at Break, % | 6.7 | |
| 6.8 to 11 |
| Fatigue Strength, MPa | 130 | |
| 500 to 620 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 83 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 560 | |
| 930 to 1070 |
| Tensile Strength: Yield (Proof), MPa | 260 | |
| 800 to 1060 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 260 |
| Maximum Temperature: Mechanical, °C | 1200 | |
| 440 |
| Melting Completion (Liquidus), °C | 1330 | |
| 1470 |
| Melting Onset (Solidus), °C | 1270 | |
| 1430 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 8.5 | |
| 41 |
| Thermal Expansion, µm/m-K | 14 | |
| 13 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 100 | |
| 3.5 |
| Density, g/cm3 | 8.1 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 6.2 | |
| 2.2 |
| Embodied Energy, MJ/kg | 84 | |
| 30 |
| Embodied Water, L/kg | 440 | |
| 57 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 31 | |
| 73 to 100 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 160 | |
| 1680 to 2970 |
| Stiffness to Weight: Axial, points | 15 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 19 | |
| 33 to 38 |
| Strength to Weight: Bending, points | 19 | |
| 27 to 30 |
| Thermal Diffusivity, mm2/s | 2.2 | |
| 11 |
| Thermal Shock Resistance, points | 14 | |
| 27 to 31 |
Alloy Composition
| Carbon (C), % | 0.050 to 0.25 | |
| 0.12 to 0.18 |
| Chromium (Cr), % | 27 to 30 | |
| 1.3 to 1.8 |
| Cobalt (Co), % | 48 to 52 | |
| 0 |
| Iron (Fe), % | 9.7 to 24.5 | |
| 95.1 to 97 |
| Manganese (Mn), % | 0 to 1.5 | |
| 0.6 to 1.0 |
| Molybdenum (Mo), % | 0 to 0.5 | |
| 0.8 to 1.0 |
| Nickel (Ni), % | 0 to 4.0 | |
| 0 |
| Niobium (Nb), % | 0 to 0.5 | |
| 0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.025 |
| Silicon (Si), % | 0.5 to 1.5 | |
| 0 to 0.6 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.030 |
| Vanadium (V), % | 0 | |
| 0.15 to 0.25 |