328.0 Aluminum vs. 771.0 Aluminum
Both 328.0 aluminum and 771.0 aluminum are aluminum alloys. They have 90% of their average alloy composition in common.
For each property being compared, the top bar is 328.0 aluminum and the bottom bar is 771.0 aluminum.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 60 to 82 | |
| 85 to 120 |
| Elastic (Young's, Tensile) Modulus, GPa | 72 | |
| 70 |
| Elongation at Break, % | 1.6 to 2.1 | |
| 1.7 to 6.5 |
| Fatigue Strength, MPa | 55 to 80 | |
| 92 to 180 |
| Poisson's Ratio | 0.33 | |
| 0.32 |
| Shear Modulus, GPa | 27 | |
| 26 |
| Tensile Strength: Ultimate (UTS), MPa | 200 to 270 | |
| 250 to 370 |
| Tensile Strength: Yield (Proof), MPa | 120 to 170 | |
| 210 to 350 |
Thermal Properties
| Latent Heat of Fusion, J/g | 510 | |
| 380 |
| Maximum Temperature: Mechanical, °C | 180 | |
| 180 |
| Melting Completion (Liquidus), °C | 620 | |
| 630 |
| Melting Onset (Solidus), °C | 560 | |
| 620 |
| Solidification (Pattern Maker's) Shrinkage, % | 1.3 | |
| 1.6 |
| Specific Heat Capacity, J/kg-K | 890 | |
| 870 |
| Thermal Conductivity, W/m-K | 120 | |
| 140 to 150 |
| Thermal Expansion, µm/m-K | 22 | |
| 24 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 30 | |
| 27 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 99 | |
| 82 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 10 | |
| 9.5 |
| Density, g/cm3 | 2.7 | |
| 3.0 |
| Embodied Carbon, kg CO2/kg material | 7.8 | |
| 8.0 |
| Embodied Energy, MJ/kg | 140 | |
| 150 |
| Embodied Water, L/kg | 1070 | |
| 1130 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 2.8 to 5.0 | |
| 4.4 to 20 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 92 to 200 | |
| 310 to 900 |
| Stiffness to Weight: Axial, points | 15 | |
| 13 |
| Stiffness to Weight: Bending, points | 51 | |
| 46 |
| Strength to Weight: Axial, points | 21 to 28 | |
| 23 to 35 |
| Strength to Weight: Bending, points | 28 to 34 | |
| 29 to 39 |
| Thermal Diffusivity, mm2/s | 50 | |
| 54 to 58 |
| Thermal Shock Resistance, points | 9.2 to 12 | |
| 11 to 16 |
Alloy Composition
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| Aluminum (Al), % | 84.5 to 91.1 | |
| 90.5 to 92.5 |
| Chromium (Cr), % | 0 to 0.35 | |
| 0.060 to 0.2 |
| Copper (Cu), % | 1.0 to 2.0 | |
| 0 to 0.1 |
| Iron (Fe), % | 0 to 1.0 | |
| 0 to 0.15 |
| Magnesium (Mg), % | 0.2 to 0.6 | |
| 0.8 to 1.0 |
| Manganese (Mn), % | 0.2 to 0.6 | |
| 0 to 0.1 |
| Nickel (Ni), % | 0 to 0.25 | |
| 0 |
| Silicon (Si), % | 7.5 to 8.5 | |
| 0 to 0.15 |
| Titanium (Ti), % | 0 to 0.25 | |
| 0.1 to 0.2 |
| Zinc (Zn), % | 0 to 1.5 | |
| 6.5 to 7.5 |
| Residuals, % | 0 to 0.5 | |
| 0 to 0.15 |