G-CoCr28 Cobalt vs. SAE-AISI 1108 Steel
G-CoCr28 cobalt belongs to the cobalt alloys classification, while SAE-AISI 1108 steel belongs to the iron alloys. 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 SAE-AISI 1108 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 190 |
| Elongation at Break, % | 6.7 | |
| 23 to 34 |
| Fatigue Strength, MPa | 130 | |
| 170 to 260 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 83 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 560 | |
| 380 to 440 |
| Tensile Strength: Yield (Proof), MPa | 260 | |
| 220 to 360 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 1200 | |
| 400 |
| Melting Completion (Liquidus), °C | 1330 | |
| 1460 |
| Melting Onset (Solidus), °C | 1270 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 8.5 | |
| 52 |
| Thermal Expansion, µm/m-K | 14 | |
| 12 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 100 | |
| 1.8 |
| Density, g/cm3 | 8.1 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 6.2 | |
| 1.4 |
| Embodied Energy, MJ/kg | 84 | |
| 18 |
| Embodied Water, L/kg | 440 | |
| 46 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 31 | |
| 95 to 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 160 | |
| 130 to 340 |
| Stiffness to Weight: Axial, points | 15 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 19 | |
| 13 to 16 |
| Strength to Weight: Bending, points | 19 | |
| 15 to 16 |
| Thermal Diffusivity, mm2/s | 2.2 | |
| 14 |
| Thermal Shock Resistance, points | 14 | |
| 12 to 14 |
Alloy Composition
| Carbon (C), % | 0.050 to 0.25 | |
| 0.080 to 0.13 |
| Chromium (Cr), % | 27 to 30 | |
| 0 |
| Cobalt (Co), % | 48 to 52 | |
| 0 |
| Iron (Fe), % | 9.7 to 24.5 | |
| 98.9 to 99.24 |
| Manganese (Mn), % | 0 to 1.5 | |
| 0.6 to 0.8 |
| Molybdenum (Mo), % | 0 to 0.5 | |
| 0 |
| Nickel (Ni), % | 0 to 4.0 | |
| 0 |
| Niobium (Nb), % | 0 to 0.5 | |
| 0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.040 |
| Silicon (Si), % | 0.5 to 1.5 | |
| 0 |
| Sulfur (S), % | 0 to 0.030 | |
| 0.080 to 0.13 |