EN 2.4964 Cobalt vs. R31233 Cobalt
Both EN 2.4964 cobalt and R31233 cobalt are cobalt alloys. They have 86% of their average alloy composition in common.
For each property being compared, the top bar is EN 2.4964 cobalt and the bottom bar is R31233 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 220 | |
| 220 |
| Elongation at Break, % | 40 | |
| 17 |
| Fatigue Strength, MPa | 220 | |
| 220 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 86 | |
| 85 |
| Tensile Strength: Ultimate (UTS), MPa | 960 | |
| 1020 |
| Tensile Strength: Yield (Proof), MPa | 390 | |
| 420 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 320 |
| Melting Completion (Liquidus), °C | 1630 | |
| 1350 |
| Melting Onset (Solidus), °C | 1550 | |
| 1330 |
| Specific Heat Capacity, J/kg-K | 400 | |
| 440 |
| Thermal Conductivity, W/m-K | 15 | |
| 12 |
| Thermal Expansion, µm/m-K | 12 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.9 | |
| 2.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 1.8 | |
| 2.1 |
Otherwise Unclassified Properties
| Density, g/cm3 | 9.6 | |
| 8.6 |
| Embodied Carbon, kg CO2/kg material | 9.8 | |
| 8.4 |
| Embodied Energy, MJ/kg | 140 | |
| 110 |
| Embodied Water, L/kg | 450 | |
| 480 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 310 | |
| 140 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 340 | |
| 410 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 21 | |
| 23 |
| Strength to Weight: Axial, points | 28 | |
| 33 |
| Strength to Weight: Bending, points | 23 | |
| 26 |
| Thermal Diffusivity, mm2/s | 3.9 | |
| 3.2 |
| Thermal Shock Resistance, points | 25 | |
| 25 |
Alloy Composition
| Boron (B), % | 0 | |
| 0 to 0.015 |
| Carbon (C), % | 0.050 to 0.15 | |
| 0.020 to 0.1 |
| Chromium (Cr), % | 19 to 21 | |
| 23.5 to 27.5 |
| Cobalt (Co), % | 46.4 to 58 | |
| 44.7 to 63.3 |
| Iron (Fe), % | 0 to 3.0 | |
| 1.0 to 5.0 |
| Manganese (Mn), % | 0 to 2.0 | |
| 0.1 to 1.5 |
| Molybdenum (Mo), % | 0 | |
| 4.0 to 6.0 |
| Nickel (Ni), % | 9.0 to 11 | |
| 7.0 to 11 |
| Nitrogen (N), % | 0 | |
| 0.030 to 0.12 |
| Phosphorus (P), % | 0 to 0.020 | |
| 0 to 0.030 |
| Silicon (Si), % | 0 to 0.4 | |
| 0.050 to 1.0 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.020 |
| Tungsten (W), % | 14 to 16 | |
| 1.0 to 3.0 |