ISO-WD32250 Magnesium vs. 7178 Aluminum
ISO-WD32250 magnesium belongs to the magnesium alloys classification, while 7178 aluminum belongs to the aluminum alloys.
For each property being compared, the top bar is ISO-WD32250 magnesium and the bottom bar is 7178 aluminum.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 45 | |
| 71 |
| Elongation at Break, % | 4.5 to 8.6 | |
| 4.5 to 12 |
| Fatigue Strength, MPa | 170 to 210 | |
| 120 to 210 |
| Poisson's Ratio | 0.29 | |
| 0.32 |
| Shear Modulus, GPa | 17 | |
| 27 |
| Shear Strength, MPa | 180 to 190 | |
| 140 to 380 |
| Tensile Strength: Ultimate (UTS), MPa | 310 to 330 | |
| 240 to 640 |
| Tensile Strength: Yield (Proof), MPa | 240 to 290 | |
| 120 to 560 |
Thermal Properties
| Latent Heat of Fusion, J/g | 340 | |
| 370 |
| Maximum Temperature: Mechanical, °C | 120 | |
| 180 |
| Melting Completion (Liquidus), °C | 600 | |
| 630 |
| Melting Onset (Solidus), °C | 550 | |
| 480 |
| Specific Heat Capacity, J/kg-K | 980 | |
| 860 |
| Thermal Conductivity, W/m-K | 130 | |
| 130 |
| Thermal Expansion, µm/m-K | 26 | |
| 23 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 25 | |
| 31 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 130 | |
| 91 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 13 | |
| 10 |
| Density, g/cm3 | 1.8 | |
| 3.1 |
| Embodied Carbon, kg CO2/kg material | 24 | |
| 8.2 |
| Embodied Energy, MJ/kg | 160 | |
| 150 |
| Embodied Water, L/kg | 950 | |
| 1110 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 14 to 26 | |
| 24 to 52 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 630 to 930 | |
| 110 to 2220 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 67 | |
| 45 |
| Strength to Weight: Axial, points | 49 to 51 | |
| 21 to 58 |
| Strength to Weight: Bending, points | 58 to 60 | |
| 28 to 54 |
| Thermal Diffusivity, mm2/s | 72 | |
| 47 |
| Thermal Shock Resistance, points | 19 to 20 | |
| 10 to 28 |
Alloy Composition
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| Aluminum (Al), % | 0 | |
| 85.4 to 89.5 |
| Chromium (Cr), % | 0 | |
| 0.18 to 0.28 |
| Copper (Cu), % | 0 | |
| 1.6 to 2.4 |
| Iron (Fe), % | 0 | |
| 0 to 0.5 |
| Magnesium (Mg), % | 94.9 to 97.1 | |
| 2.4 to 3.1 |
| Manganese (Mn), % | 0 | |
| 0 to 0.3 |
| Silicon (Si), % | 0 | |
| 0 to 0.4 |
| Titanium (Ti), % | 0 | |
| 0 to 0.2 |
| Zinc (Zn), % | 2.5 to 4.0 | |
| 6.3 to 7.3 |
| Zirconium (Zr), % | 0.45 to 0.8 | |
| 0 |
| Residuals, % | 0 to 0.3 | |
| 0 to 0.15 |