G-CoCr28 Cobalt vs. S20910 Stainless Steel
G-CoCr28 cobalt belongs to the cobalt alloys classification, while S20910 stainless steel belongs to the iron alloys. They have 43% of their average alloy composition in common. 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 S20910 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 200 |
| Elongation at Break, % | 6.7 | |
| 14 to 39 |
| Fatigue Strength, MPa | 130 | |
| 310 to 460 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 83 | |
| 79 |
| Tensile Strength: Ultimate (UTS), MPa | 560 | |
| 780 to 940 |
| Tensile Strength: Yield (Proof), MPa | 260 | |
| 430 to 810 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 300 |
| Maximum Temperature: Mechanical, °C | 1200 | |
| 1080 |
| Melting Completion (Liquidus), °C | 1330 | |
| 1420 |
| Melting Onset (Solidus), °C | 1270 | |
| 1380 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 480 |
| Thermal Conductivity, W/m-K | 8.5 | |
| 13 |
| Thermal Expansion, µm/m-K | 14 | |
| 16 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 100 | |
| 22 |
| Density, g/cm3 | 8.1 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 6.2 | |
| 4.8 |
| Embodied Energy, MJ/kg | 84 | |
| 68 |
| Embodied Water, L/kg | 440 | |
| 180 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 31 | |
| 120 to 260 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 160 | |
| 460 to 1640 |
| Stiffness to Weight: Axial, points | 15 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 | |
| 25 |
| Strength to Weight: Axial, points | 19 | |
| 28 to 33 |
| Strength to Weight: Bending, points | 19 | |
| 24 to 27 |
| Thermal Diffusivity, mm2/s | 2.2 | |
| 3.6 |
| Thermal Shock Resistance, points | 14 | |
| 17 to 21 |
Alloy Composition
| Carbon (C), % | 0.050 to 0.25 | |
| 0 to 0.060 |
| Chromium (Cr), % | 27 to 30 | |
| 20.5 to 23.5 |
| Cobalt (Co), % | 48 to 52 | |
| 0 |
| Iron (Fe), % | 9.7 to 24.5 | |
| 52.1 to 62.1 |
| Manganese (Mn), % | 0 to 1.5 | |
| 4.0 to 6.0 |
| Molybdenum (Mo), % | 0 to 0.5 | |
| 1.5 to 3.0 |
| Nickel (Ni), % | 0 to 4.0 | |
| 11.5 to 13.5 |
| Niobium (Nb), % | 0 to 0.5 | |
| 0.1 to 0.3 |
| Nitrogen (N), % | 0 | |
| 0.2 to 0.4 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.040 |
| Silicon (Si), % | 0.5 to 1.5 | |
| 0 to 0.75 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.030 |
| Vanadium (V), % | 0 | |
| 0.1 to 0.3 |