771.0 Aluminum vs. 2218 Aluminum
Both 771.0 aluminum and 2218 aluminum are aluminum alloys. They have a moderately high 93% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.
For each property being compared, the top bar is 771.0 aluminum and the bottom bar is 2218 aluminum.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 85 to 120 | |
| 95 to 110 |
| Elastic (Young's, Tensile) Modulus, GPa | 70 | |
| 73 |
| Elongation at Break, % | 1.7 to 6.5 | |
| 6.8 to 10 |
| Fatigue Strength, MPa | 92 to 180 | |
| 110 |
| Poisson's Ratio | 0.32 | |
| 0.33 |
| Shear Modulus, GPa | 26 | |
| 27 |
| Tensile Strength: Ultimate (UTS), MPa | 250 to 370 | |
| 330 to 430 |
| Tensile Strength: Yield (Proof), MPa | 210 to 350 | |
| 260 to 310 |
Thermal Properties
| Latent Heat of Fusion, J/g | 380 | |
| 390 |
| Maximum Temperature: Mechanical, °C | 180 | |
| 220 |
| Melting Completion (Liquidus), °C | 630 | |
| 640 |
| Melting Onset (Solidus), °C | 620 | |
| 510 |
| Specific Heat Capacity, J/kg-K | 870 | |
| 870 |
| Thermal Conductivity, W/m-K | 140 to 150 | |
| 140 |
| Thermal Expansion, µm/m-K | 24 | |
| 22 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 27 | |
| 37 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 82 | |
| 110 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 9.5 | |
| 11 |
| Density, g/cm3 | 3.0 | |
| 3.1 |
| Embodied Carbon, kg CO2/kg material | 8.0 | |
| 8.2 |
| Embodied Energy, MJ/kg | 150 | |
| 150 |
| Embodied Water, L/kg | 1130 | |
| 1130 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 4.4 to 20 | |
| 27 to 31 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 310 to 900 | |
| 450 to 650 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 46 | |
| 45 |
| Strength to Weight: Axial, points | 23 to 35 | |
| 30 to 39 |
| Strength to Weight: Bending, points | 29 to 39 | |
| 34 to 41 |
| Thermal Diffusivity, mm2/s | 54 to 58 | |
| 52 |
| Thermal Shock Resistance, points | 11 to 16 | |
| 15 to 19 |
Alloy Composition
| Aluminum (Al), % | 90.5 to 92.5 | |
| 88.8 to 93.6 |
| Chromium (Cr), % | 0.060 to 0.2 | |
| 0 to 0.1 |
| Copper (Cu), % | 0 to 0.1 | |
| 3.5 to 4.5 |
| Iron (Fe), % | 0 to 0.15 | |
| 0 to 1.0 |
| Magnesium (Mg), % | 0.8 to 1.0 | |
| 1.2 to 1.8 |
| Manganese (Mn), % | 0 to 0.1 | |
| 0 to 0.2 |
| Nickel (Ni), % | 0 | |
| 1.7 to 2.3 |
| Silicon (Si), % | 0 to 0.15 | |
| 0 to 0.9 |
| Titanium (Ti), % | 0.1 to 0.2 | |
| 0 |
| Zinc (Zn), % | 6.5 to 7.5 | |
| 0 to 0.25 |
| Residuals, % | 0 | |
| 0 to 0.15 |