G-CoCr28 Cobalt vs. AISI 201LN Stainless Steel
G-CoCr28 cobalt belongs to the cobalt alloys classification, while AISI 201LN stainless steel belongs to the iron alloys. They have a modest 37% 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 (6, in this case) are not shown.
For each property being compared, the top bar is G-CoCr28 cobalt and the bottom bar is AISI 201LN stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 200 |
| Elongation at Break, % | 6.7 | |
| 25 to 51 |
| Fatigue Strength, MPa | 130 | |
| 340 to 540 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 83 | |
| 77 |
| Tensile Strength: Ultimate (UTS), MPa | 560 | |
| 740 to 1060 |
| Tensile Strength: Yield (Proof), MPa | 260 | |
| 350 to 770 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 280 |
| Maximum Temperature: Mechanical, °C | 1200 | |
| 880 |
| Melting Completion (Liquidus), °C | 1330 | |
| 1410 |
| Melting Onset (Solidus), °C | 1270 | |
| 1370 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 480 |
| Thermal Conductivity, W/m-K | 8.5 | |
| 15 |
| Thermal Expansion, µm/m-K | 14 | |
| 17 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 100 | |
| 12 |
| Density, g/cm3 | 8.1 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 6.2 | |
| 2.6 |
| Embodied Energy, MJ/kg | 84 | |
| 38 |
| Embodied Water, L/kg | 440 | |
| 140 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 31 | |
| 230 to 310 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 160 | |
| 310 to 1520 |
| Stiffness to Weight: Axial, points | 15 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 | |
| 25 |
| Strength to Weight: Axial, points | 19 | |
| 27 to 38 |
| Strength to Weight: Bending, points | 19 | |
| 24 to 30 |
| Thermal Diffusivity, mm2/s | 2.2 | |
| 4.0 |
| Thermal Shock Resistance, points | 14 | |
| 16 to 23 |
Alloy Composition
| Carbon (C), % | 0.050 to 0.25 | |
| 0 to 0.030 |
| Chromium (Cr), % | 27 to 30 | |
| 16 to 17.5 |
| Cobalt (Co), % | 48 to 52 | |
| 0 |
| Copper (Cu), % | 0 | |
| 0 to 1.0 |
| Iron (Fe), % | 9.7 to 24.5 | |
| 67.9 to 73.5 |
| Manganese (Mn), % | 0 to 1.5 | |
| 6.4 to 7.5 |
| Molybdenum (Mo), % | 0 to 0.5 | |
| 0 |
| Nickel (Ni), % | 0 to 4.0 | |
| 4.0 to 5.0 |
| Niobium (Nb), % | 0 to 0.5 | |
| 0 |
| Nitrogen (N), % | 0 | |
| 0.1 to 0.25 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.045 |
| Silicon (Si), % | 0.5 to 1.5 | |
| 0 to 0.75 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.015 |