EN 2.4964 Cobalt vs. AISI 204 Stainless Steel
EN 2.4964 cobalt belongs to the cobalt alloys classification, while AISI 204 stainless steel belongs to the iron alloys. They have a modest 21% 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 EN 2.4964 cobalt and the bottom bar is AISI 204 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 220 | |
| 200 |
| Elongation at Break, % | 40 | |
| 23 to 39 |
| Fatigue Strength, MPa | 220 | |
| 320 to 720 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 86 | |
| 77 |
| Tensile Strength: Ultimate (UTS), MPa | 960 | |
| 730 to 1100 |
| Tensile Strength: Yield (Proof), MPa | 390 | |
| 380 to 1080 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 280 |
| Melting Completion (Liquidus), °C | 1630 | |
| 1410 |
| Melting Onset (Solidus), °C | 1550 | |
| 1370 |
| Specific Heat Capacity, J/kg-K | 400 | |
| 480 |
| Thermal Conductivity, W/m-K | 15 | |
| 15 |
| Thermal Expansion, µm/m-K | 12 | |
| 17 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.9 | |
| 2.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 1.8 | |
| 2.9 |
Otherwise Unclassified Properties
| Density, g/cm3 | 9.6 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 9.8 | |
| 2.4 |
| Embodied Energy, MJ/kg | 140 | |
| 35 |
| Embodied Water, L/kg | 450 | |
| 130 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 310 | |
| 240 to 250 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 340 | |
| 360 to 2940 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 21 | |
| 25 |
| Strength to Weight: Axial, points | 28 | |
| 27 to 40 |
| Strength to Weight: Bending, points | 23 | |
| 24 to 31 |
| Thermal Diffusivity, mm2/s | 3.9 | |
| 4.1 |
| Thermal Shock Resistance, points | 25 | |
| 16 to 24 |
Alloy Composition
| Carbon (C), % | 0.050 to 0.15 | |
| 0 to 0.030 |
| Chromium (Cr), % | 19 to 21 | |
| 15 to 17 |
| Cobalt (Co), % | 46.4 to 58 | |
| 0 |
| Iron (Fe), % | 0 to 3.0 | |
| 69.6 to 76.4 |
| Manganese (Mn), % | 0 to 2.0 | |
| 7.0 to 9.0 |
| Nickel (Ni), % | 9.0 to 11 | |
| 1.5 to 3.0 |
| Nitrogen (N), % | 0 | |
| 0.15 to 0.3 |
| Phosphorus (P), % | 0 to 0.020 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 0.4 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.030 |
| Tungsten (W), % | 14 to 16 | |
| 0 |