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