EN 1.4005 Stainless Steel vs. G-CoCr28 Cobalt
EN 1.4005 stainless steel belongs to the iron alloys classification, while G-CoCr28 cobalt belongs to the cobalt alloys. They have a modest 32% 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 EN 1.4005 stainless steel and the bottom bar is G-CoCr28 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 210 |
| Elongation at Break, % | 13 to 21 | |
| 6.7 |
| Fatigue Strength, MPa | 240 to 290 | |
| 130 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 76 | |
| 83 |
| Tensile Strength: Ultimate (UTS), MPa | 630 to 750 | |
| 560 |
| Tensile Strength: Yield (Proof), MPa | 370 to 500 | |
| 260 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 320 |
| Maximum Temperature: Mechanical, °C | 760 | |
| 1200 |
| Melting Completion (Liquidus), °C | 1440 | |
| 1330 |
| Melting Onset (Solidus), °C | 1400 | |
| 1270 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 470 |
| Thermal Conductivity, W/m-K | 30 | |
| 8.5 |
| Thermal Expansion, µm/m-K | 10 | |
| 14 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 7.0 | |
| 100 |
| Density, g/cm3 | 7.7 | |
| 8.1 |
| Embodied Carbon, kg CO2/kg material | 2.0 | |
| 6.2 |
| Embodied Energy, MJ/kg | 28 | |
| 84 |
| Embodied Water, L/kg | 100 | |
| 440 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 90 to 110 | |
| 31 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 350 to 650 | |
| 160 |
| Stiffness to Weight: Axial, points | 14 | |
| 15 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 23 to 27 | |
| 19 |
| Strength to Weight: Bending, points | 21 to 24 | |
| 19 |
| Thermal Diffusivity, mm2/s | 8.1 | |
| 2.2 |
| Thermal Shock Resistance, points | 23 to 27 | |
| 14 |
Alloy Composition
| Carbon (C), % | 0.060 to 0.15 | |
| 0.050 to 0.25 |
| Chromium (Cr), % | 12 to 14 | |
| 27 to 30 |
| Cobalt (Co), % | 0 | |
| 48 to 52 |
| Iron (Fe), % | 82.4 to 87.8 | |
| 9.7 to 24.5 |
| Manganese (Mn), % | 0 to 1.5 | |
| 0 to 1.5 |
| Molybdenum (Mo), % | 0 to 0.6 | |
| 0 to 0.5 |
| Nickel (Ni), % | 0 | |
| 0 to 4.0 |
| Niobium (Nb), % | 0 | |
| 0 to 0.5 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 1.0 | |
| 0.5 to 1.5 |
| Sulfur (S), % | 0.15 to 0.35 | |
| 0 to 0.030 |