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