ASTM B540 Palladium vs. R31539 Cobalt
ASTM B540 palladium belongs to the otherwise unclassified metals classification, while R31539 cobalt belongs to the cobalt alloys. 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 ASTM B540 palladium and the bottom bar is R31539 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 220 |
| Elongation at Break, % | 1.1 to 14 | |
| 13 to 22 |
| Fatigue Strength, MPa | 350 | |
| 310 to 480 |
| Poisson's Ratio | 0.38 | |
| 0.29 |
| Shear Modulus, GPa | 39 | |
| 86 |
| Tensile Strength: Ultimate (UTS), MPa | 830 to 1240 | |
| 1000 to 1340 |
| Tensile Strength: Yield (Proof), MPa | 620 to 1000 | |
| 590 to 940 |
Thermal Properties
| Latent Heat of Fusion, J/g | 140 | |
| 320 |
| Melting Completion (Liquidus), °C | 1220 | |
| 1360 |
| Melting Onset (Solidus), °C | 1020 | |
| 1290 |
| Specific Heat Capacity, J/kg-K | 240 | |
| 450 |
| Thermal Expansion, µm/m-K | 14 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 4.9 to 5.5 | |
| 2.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 3.5 to 3.9 | |
| 2.1 |
Otherwise Unclassified Properties
| Density, g/cm3 | 13 | |
| 8.4 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 13 to 100 | |
| 140 to 190 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1790 to 4660 | |
| 780 to 2000 |
| Stiffness to Weight: Axial, points | 4.7 | |
| 15 |
| Stiffness to Weight: Bending, points | 12 | |
| 24 |
| Strength to Weight: Axial, points | 18 to 27 | |
| 33 to 44 |
| Strength to Weight: Bending, points | 15 to 20 | |
| 27 to 32 |
| Thermal Shock Resistance, points | 41 to 61 | |
| 24 to 32 |
Alloy Composition
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| Aluminum (Al), % | 0 | |
| 0.3 to 1.0 |
| Carbon (C), % | 0 | |
| 0 to 0.14 |
| Chromium (Cr), % | 0 | |
| 26 to 30 |
| Cobalt (Co), % | 0 | |
| 57.7 to 68.7 |
| Copper (Cu), % | 13.5 to 14.5 | |
| 0 |
| Gold (Au), % | 9.5 to 10.5 | |
| 0 |
| Iron (Fe), % | 0 | |
| 0 to 0.75 |
| Lanthanum (La), % | 0 | |
| 0.030 to 0.2 |
| Manganese (Mn), % | 0 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 0 | |
| 5.0 to 7.0 |
| Nickel (Ni), % | 0 | |
| 0 to 1.0 |
| Nitrogen (N), % | 0 | |
| 0 to 0.25 |
| Palladium (Pd), % | 34 to 36 | |
| 0 |
| Platinum (Pt), % | 9.5 to 10.5 | |
| 0 |
| Silicon (Si), % | 0 | |
| 0 to 1.0 |
| Silver (Ag), % | 29 to 31 | |
| 0 |
| Zinc (Zn), % | 0.8 to 1.2 | |
| 0 |
| Residuals, % | 0 to 0.3 | |
| 0 |