Commercially Pure Palladium vs. ASTM A387 Grade 21 Steel
Commercially pure palladium belongs to the otherwise unclassified metals classification, while ASTM A387 grade 21 steel belongs to the iron alloys. There are 19 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.
For each property being compared, the top bar is commercially pure palladium and the bottom bar is ASTM A387 grade 21 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 120 | |
| 190 |
| Elongation at Break, % | 1.1 to 11 | |
| 21 |
| Poisson's Ratio | 0.39 | |
| 0.29 |
| Shear Modulus, GPa | 43 | |
| 74 |
| Shear Strength, MPa | 120 to 200 | |
| 310 to 370 |
| Tensile Strength: Ultimate (UTS), MPa | 200 to 380 | |
| 500 to 590 |
Thermal Properties
| Latent Heat of Fusion, J/g | 160 | |
| 260 |
| Melting Completion (Liquidus), °C | 1550 | |
| 1470 |
| Melting Onset (Solidus), °C | 1550 | |
| 1430 |
| Specific Heat Capacity, J/kg-K | 240 | |
| 470 |
| Thermal Expansion, µm/m-K | 12 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 16 | |
| 7.6 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 12 | |
| 8.8 |
Otherwise Unclassified Properties
| Density, g/cm3 | 12 | |
| 7.9 |
Common Calculations
| Stiffness to Weight: Axial, points | 5.6 | |
| 13 |
| Stiffness to Weight: Bending, points | 14 | |
| 24 |
| Strength to Weight: Axial, points | 4.5 to 8.8 | |
| 18 to 21 |
| Strength to Weight: Bending, points | 6.2 to 9.7 | |
| 18 to 20 |
| Thermal Shock Resistance, points | 9.8 to 19 | |
| 14 to 17 |
Alloy Composition
| Carbon (C), % | 0 | |
| 0.050 to 0.15 |
| Chromium (Cr), % | 0 | |
| 2.8 to 3.3 |
| Iron (Fe), % | 0 | |
| 94.4 to 96 |
| Manganese (Mn), % | 0 | |
| 0.3 to 0.6 |
| Molybdenum (Mo), % | 0 | |
| 0.9 to 1.1 |
| Palladium (Pd), % | 99.8 to 100 | |
| 0 |
| Phosphorus (P), % | 0 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 | |
| 0 to 0.025 |
| Residuals, % | 0 to 0.2 | |
| 0 |