7129 Aluminum vs. 7204 Aluminum
Both 7129 Aluminum and 7204 aluminum are aluminum alloys. Their average alloy composition is basically identical.
For each property being compared, the top bar is 7129 Aluminum and the bottom bar is 7204 aluminum.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 69 | |
| 70 |
| Elongation at Break, % | 9.0 to 9.1 | |
| 11 to 13 |
| Fatigue Strength, MPa | 150 to 190 | |
| 110 to 130 |
| Poisson's Ratio | 0.33 | |
| 0.33 |
| Shear Modulus, GPa | 26 | |
| 26 |
| Shear Strength, MPa | 250 to 260 | |
| 130 to 220 |
| Tensile Strength: Ultimate (UTS), MPa | 430 | |
| 220 to 380 |
| Tensile Strength: Yield (Proof), MPa | 380 to 390 | |
| 120 to 310 |
Thermal Properties
| Latent Heat of Fusion, J/g | 380 | |
| 380 |
| Maximum Temperature: Mechanical, °C | 180 | |
| 210 |
| Melting Completion (Liquidus), °C | 630 | |
| 640 |
| Melting Onset (Solidus), °C | 510 | |
| 520 |
| Specific Heat Capacity, J/kg-K | 880 | |
| 880 |
| Thermal Conductivity, W/m-K | 150 | |
| 150 |
| Thermal Expansion, µm/m-K | 24 | |
| 24 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 40 | |
| 39 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 120 | |
| 120 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 9.5 | |
| 9.5 |
| Density, g/cm3 | 2.9 | |
| 2.9 |
| Embodied Carbon, kg CO2/kg material | 8.3 | |
| 8.4 |
| Embodied Energy, MJ/kg | 150 | |
| 150 |
| Embodied Water, L/kg | 1150 | |
| 1140 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 37 to 38 | |
| 25 to 40 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1050 to 1090 | |
| 110 to 710 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 47 | |
| 47 |
| Strength to Weight: Axial, points | 41 | |
| 21 to 36 |
| Strength to Weight: Bending, points | 43 to 44 | |
| 28 to 40 |
| Thermal Diffusivity, mm2/s | 58 | |
| 58 |
| Thermal Shock Resistance, points | 19 | |
| 9.4 to 16 |
Alloy Composition
| Aluminum (Al), % | 91 to 94 | |
| 90.5 to 94.8 |
| Chromium (Cr), % | 0 to 0.1 | |
| 0 to 0.3 |
| Copper (Cu), % | 0.5 to 0.9 | |
| 0 to 0.2 |
| Gallium (Ga), % | 0 to 0.030 | |
| 0 |
| Iron (Fe), % | 0 to 0.3 | |
| 0 to 0.35 |
| Magnesium (Mg), % | 1.3 to 2.0 | |
| 1.0 to 2.0 |
| Manganese (Mn), % | 0 to 0.1 | |
| 0.2 to 0.7 |
| Silicon (Si), % | 0 to 0.15 | |
| 0 to 0.3 |
| Titanium (Ti), % | 0 to 0.050 | |
| 0 to 0.2 |
| Vanadium (V), % | 0 to 0.050 | |
| 0 to 0.1 |
| Zinc (Zn), % | 4.2 to 5.2 | |
| 4.0 to 5.0 |
| Zirconium (Zr), % | 0 | |
| 0 to 0.25 |
| Residuals, % | 0 | |
| 0 to 0.15 |