7129 Aluminum vs. ISO-WD32250 Magnesium
7129 Aluminum belongs to the aluminum alloys classification, while ISO-WD32250 magnesium belongs to the magnesium alloys.
For each property being compared, the top bar is 7129 Aluminum and the bottom bar is ISO-WD32250 magnesium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 69 | |
| 45 |
| Elongation at Break, % | 9.0 to 9.1 | |
| 4.5 to 8.6 |
| Fatigue Strength, MPa | 150 to 190 | |
| 170 to 210 |
| Poisson's Ratio | 0.33 | |
| 0.29 |
| Shear Modulus, GPa | 26 | |
| 17 |
| Shear Strength, MPa | 250 to 260 | |
| 180 to 190 |
| Tensile Strength: Ultimate (UTS), MPa | 430 | |
| 310 to 330 |
| Tensile Strength: Yield (Proof), MPa | 380 to 390 | |
| 240 to 290 |
Thermal Properties
| Latent Heat of Fusion, J/g | 380 | |
| 340 |
| Maximum Temperature: Mechanical, °C | 180 | |
| 120 |
| Melting Completion (Liquidus), °C | 630 | |
| 600 |
| Melting Onset (Solidus), °C | 510 | |
| 550 |
| Specific Heat Capacity, J/kg-K | 880 | |
| 980 |
| Thermal Conductivity, W/m-K | 150 | |
| 130 |
| Thermal Expansion, µm/m-K | 24 | |
| 26 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 40 | |
| 25 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 120 | |
| 130 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 9.5 | |
| 13 |
| Density, g/cm3 | 2.9 | |
| 1.8 |
| Embodied Carbon, kg CO2/kg material | 8.3 | |
| 24 |
| Embodied Energy, MJ/kg | 150 | |
| 160 |
| Embodied Water, L/kg | 1150 | |
| 950 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 37 to 38 | |
| 14 to 26 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1050 to 1090 | |
| 630 to 930 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 47 | |
| 67 |
| Strength to Weight: Axial, points | 41 | |
| 49 to 51 |
| Strength to Weight: Bending, points | 43 to 44 | |
| 58 to 60 |
| Thermal Diffusivity, mm2/s | 58 | |
| 72 |
| Thermal Shock Resistance, points | 19 | |
| 19 to 20 |
Alloy Composition
| Aluminum (Al), % | 91 to 94 | |
| 0 |
| Chromium (Cr), % | 0 to 0.1 | |
| 0 |
| Copper (Cu), % | 0.5 to 0.9 | |
| 0 |
| Gallium (Ga), % | 0 to 0.030 | |
| 0 |
| Iron (Fe), % | 0 to 0.3 | |
| 0 |
| Magnesium (Mg), % | 1.3 to 2.0 | |
| 94.9 to 97.1 |
| Manganese (Mn), % | 0 to 0.1 | |
| 0 |
| Silicon (Si), % | 0 to 0.15 | |
| 0 |
| Titanium (Ti), % | 0 to 0.050 | |
| 0 |
| Vanadium (V), % | 0 to 0.050 | |
| 0 |
| Zinc (Zn), % | 4.2 to 5.2 | |
| 2.5 to 4.0 |
| Zirconium (Zr), % | 0 | |
| 0.45 to 0.8 |
| Residuals, % | 0 | |
| 0 to 0.3 |