2218 Aluminum vs. ASTM B540 Palladium
2218 aluminum belongs to the aluminum alloys classification, while ASTM B540 palladium belongs to the otherwise unclassified metals. There are 23 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.
For each property being compared, the top bar is 2218 aluminum and the bottom bar is ASTM B540 palladium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 73 | |
| 110 |
| Elongation at Break, % | 6.8 to 10 | |
| 1.1 to 14 |
| Fatigue Strength, MPa | 110 | |
| 350 |
| Poisson's Ratio | 0.33 | |
| 0.38 |
| Shear Modulus, GPa | 27 | |
| 39 |
| Shear Strength, MPa | 210 to 250 | |
| 500 to 700 |
| Tensile Strength: Ultimate (UTS), MPa | 330 to 430 | |
| 830 to 1240 |
| Tensile Strength: Yield (Proof), MPa | 260 to 310 | |
| 620 to 1000 |
Thermal Properties
| Latent Heat of Fusion, J/g | 390 | |
| 140 |
| Melting Completion (Liquidus), °C | 640 | |
| 1220 |
| Melting Onset (Solidus), °C | 510 | |
| 1020 |
| Specific Heat Capacity, J/kg-K | 870 | |
| 240 |
| Thermal Expansion, µm/m-K | 22 | |
| 14 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 37 | |
| 4.9 to 5.5 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 110 | |
| 3.5 to 3.9 |
Otherwise Unclassified Properties
| Density, g/cm3 | 3.1 | |
| 13 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 27 to 31 | |
| 13 to 100 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 450 to 650 | |
| 1790 to 4660 |
| Stiffness to Weight: Axial, points | 13 | |
| 4.7 |
| Stiffness to Weight: Bending, points | 45 | |
| 12 |
| Strength to Weight: Axial, points | 30 to 39 | |
| 18 to 27 |
| Strength to Weight: Bending, points | 34 to 41 | |
| 15 to 20 |
| Thermal Shock Resistance, points | 15 to 19 | |
| 41 to 61 |
Alloy Composition
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| Aluminum (Al), % | 88.8 to 93.6 | |
| 0 |
| Chromium (Cr), % | 0 to 0.1 | |
| 0 |
| Copper (Cu), % | 3.5 to 4.5 | |
| 13.5 to 14.5 |
| Gold (Au), % | 0 | |
| 9.5 to 10.5 |
| Iron (Fe), % | 0 to 1.0 | |
| 0 |
| Magnesium (Mg), % | 1.2 to 1.8 | |
| 0 |
| Manganese (Mn), % | 0 to 0.2 | |
| 0 |
| Nickel (Ni), % | 1.7 to 2.3 | |
| 0 |
| Palladium (Pd), % | 0 | |
| 34 to 36 |
| Platinum (Pt), % | 0 | |
| 9.5 to 10.5 |
| Silicon (Si), % | 0 to 0.9 | |
| 0 |
| Silver (Ag), % | 0 | |
| 29 to 31 |
| Zinc (Zn), % | 0 to 0.25 | |
| 0.8 to 1.2 |
| Residuals, % | 0 to 0.15 | |
| 0 to 0.3 |