Hot Forged R30035 Cobalt vs. Hot Worked R31537 Cobalt
Both hot forged R30035 cobalt and hot worked R31537 cobalt are cobalt alloys. Both are furnished in the hot worked condition. They have 61% of their average alloy composition in common. There are 25 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 hot forged R30035 cobalt and the bottom bar is hot worked R31537 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 230 | |
| 220 |
| Fatigue Strength, MPa | 500 | |
| 400 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 89 | |
| 87 |
| Tensile Strength: Ultimate (UTS), MPa | 1200 | |
| 1140 |
| Tensile Strength: Yield (Proof), MPa | 980 | |
| 780 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 320 |
| Melting Completion (Liquidus), °C | 1440 | |
| 1360 |
| Melting Onset (Solidus), °C | 1320 | |
| 1290 |
| Specific Heat Capacity, J/kg-K | 440 | |
| 450 |
| Thermal Conductivity, W/m-K | 11 | |
| 13 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.7 | |
| 2.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 1.8 | |
| 2.1 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.7 | |
| 8.4 |
| Embodied Carbon, kg CO2/kg material | 10 | |
| 8.1 |
| Embodied Energy, MJ/kg | 140 | |
| 110 |
| Embodied Water, L/kg | 410 | |
| 530 |
Common Calculations
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 2090 | |
| 1380 |
| Stiffness to Weight: Axial, points | 15 | |
| 15 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 39 | |
| 38 |
| Strength to Weight: Bending, points | 29 | |
| 29 |
| Thermal Diffusivity, mm2/s | 3.0 | |
| 3.4 |
| Thermal Shock Resistance, points | 29 | |
| 28 |
Alloy Composition
| Boron (B), % | 0 to 0.015 | |
| 0 |
| Carbon (C), % | 0 to 0.025 | |
| 0 to 0.14 |
| Chromium (Cr), % | 19 to 21 | |
| 26 to 30 |
| Cobalt (Co), % | 29.1 to 39 | |
| 58.9 to 69 |
| Iron (Fe), % | 0 to 1.0 | |
| 0 to 0.75 |
| Manganese (Mn), % | 0 to 0.15 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 9.0 to 10.5 | |
| 5.0 to 7.0 |
| Nickel (Ni), % | 33 to 37 | |
| 0 to 1.0 |
| Nitrogen (N), % | 0 | |
| 0 to 0.25 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 |
| Silicon (Si), % | 0 to 0.15 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 |
| Titanium (Ti), % | 0 to 1.0 | |
| 0 |