R31538 Cobalt vs. ASTM B540 Palladium
R31538 cobalt belongs to the cobalt alloys classification, while ASTM B540 palladium belongs to the otherwise unclassified metals. There are 22 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.
For each property being compared, the top bar is R31538 cobalt and the bottom bar is ASTM B540 palladium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 220 | |
| 110 |
| Elongation at Break, % | 13 to 23 | |
| 1.1 to 14 |
| Fatigue Strength, MPa | 310 to 480 | |
| 350 |
| Poisson's Ratio | 0.29 | |
| 0.38 |
| Shear Modulus, GPa | 86 | |
| 39 |
| Tensile Strength: Ultimate (UTS), MPa | 1020 to 1360 | |
| 830 to 1240 |
| Tensile Strength: Yield (Proof), MPa | 580 to 930 | |
| 620 to 1000 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 140 |
| Melting Completion (Liquidus), °C | 1360 | |
| 1220 |
| Melting Onset (Solidus), °C | 1290 | |
| 1020 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 240 |
| Thermal Expansion, µm/m-K | 13 | |
| 14 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.0 | |
| 4.9 to 5.5 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.1 | |
| 3.5 to 3.9 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.4 | |
| 13 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 140 to 200 | |
| 13 to 100 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 750 to 1920 | |
| 1790 to 4660 |
| Stiffness to Weight: Axial, points | 15 | |
| 4.7 |
| Stiffness to Weight: Bending, points | 24 | |
| 12 |
| Strength to Weight: Axial, points | 34 to 45 | |
| 18 to 27 |
| Strength to Weight: Bending, points | 27 to 32 | |
| 15 to 20 |
| Thermal Shock Resistance, points | 25 to 33 | |
| 41 to 61 |
Alloy Composition
| Carbon (C), % | 0.15 to 0.35 | |
| 0 |
| Chromium (Cr), % | 26 to 30 | |
| 0 |
| Cobalt (Co), % | 58.7 to 68.9 | |
| 0 |
| Copper (Cu), % | 0 | |
| 13.5 to 14.5 |
| Gold (Au), % | 0 | |
| 9.5 to 10.5 |
| Iron (Fe), % | 0 to 0.75 | |
| 0 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0 |
| Molybdenum (Mo), % | 5.0 to 7.0 | |
| 0 |
| Nickel (Ni), % | 0 to 1.0 | |
| 0 |
| Nitrogen (N), % | 0 to 0.25 | |
| 0 |
| Palladium (Pd), % | 0 | |
| 34 to 36 |
| Platinum (Pt), % | 0 | |
| 9.5 to 10.5 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 |
| Silver (Ag), % | 0 | |
| 29 to 31 |
| Zinc (Zn), % | 0 | |
| 0.8 to 1.2 |
| Residuals, % | 0 | |
| 0 to 0.3 |