204.0 Aluminum vs. 771.0 Aluminum
Both 204.0 aluminum and 771.0 aluminum are aluminum alloys. They have a moderately high 92% of their average alloy composition in common.
For each property being compared, the top bar is 204.0 aluminum and the bottom bar is 771.0 aluminum.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 90 to 120 | |
| 85 to 120 |
| Elastic (Young's, Tensile) Modulus, GPa | 71 | |
| 70 |
| Elongation at Break, % | 5.7 to 7.8 | |
| 1.7 to 6.5 |
| Fatigue Strength, MPa | 63 to 77 | |
| 92 to 180 |
| Poisson's Ratio | 0.33 | |
| 0.32 |
| Shear Modulus, GPa | 27 | |
| 26 |
| Tensile Strength: Ultimate (UTS), MPa | 230 to 340 | |
| 250 to 370 |
| Tensile Strength: Yield (Proof), MPa | 180 to 220 | |
| 210 to 350 |
Thermal Properties
| Latent Heat of Fusion, J/g | 390 | |
| 380 |
| Maximum Temperature: Mechanical, °C | 170 | |
| 180 |
| Melting Completion (Liquidus), °C | 650 | |
| 630 |
| Melting Onset (Solidus), °C | 580 | |
| 620 |
| Solidification (Pattern Maker's) Shrinkage, % | 1.3 | |
| 1.6 |
| Specific Heat Capacity, J/kg-K | 880 | |
| 870 |
| Thermal Conductivity, W/m-K | 120 | |
| 140 to 150 |
| Thermal Expansion, µm/m-K | 19 | |
| 24 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 29 to 34 | |
| 27 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 87 to 100 | |
| 82 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 11 | |
| 9.5 |
| Density, g/cm3 | 3.0 | |
| 3.0 |
| Embodied Carbon, kg CO2/kg material | 8.0 | |
| 8.0 |
| Embodied Energy, MJ/kg | 150 | |
| 150 |
| Embodied Water, L/kg | 1150 | |
| 1130 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 12 to 23 | |
| 4.4 to 20 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 220 to 350 | |
| 310 to 900 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 46 | |
| 46 |
| Strength to Weight: Axial, points | 21 to 31 | |
| 23 to 35 |
| Strength to Weight: Bending, points | 28 to 36 | |
| 29 to 39 |
| Thermal Diffusivity, mm2/s | 46 | |
| 54 to 58 |
| Thermal Shock Resistance, points | 12 to 18 | |
| 11 to 16 |
Alloy Composition
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| Aluminum (Al), % | 93.4 to 95.5 | |
| 90.5 to 92.5 |
| Chromium (Cr), % | 0 | |
| 0.060 to 0.2 |
| Copper (Cu), % | 4.2 to 5.0 | |
| 0 to 0.1 |
| Iron (Fe), % | 0 to 0.35 | |
| 0 to 0.15 |
| Magnesium (Mg), % | 0.15 to 0.35 | |
| 0.8 to 1.0 |
| Manganese (Mn), % | 0 to 0.1 | |
| 0 to 0.1 |
| Nickel (Ni), % | 0 to 0.050 | |
| 0 |
| Silicon (Si), % | 0 to 0.2 | |
| 0 to 0.15 |
| Tin (Sn), % | 0 to 0.050 | |
| 0 |
| Titanium (Ti), % | 0.15 to 0.3 | |
| 0.1 to 0.2 |
| Zinc (Zn), % | 0 to 0.1 | |
| 6.5 to 7.5 |
| Residuals, % | 0 to 0.15 | |
| 0 to 0.15 |