5042 Aluminum vs. ZK40A Magnesium
5042 aluminum belongs to the aluminum alloys classification, while ZK40A magnesium belongs to the magnesium alloys.
For each property being compared, the top bar is 5042 aluminum and the bottom bar is ZK40A magnesium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 68 | |
| 45 |
| Elongation at Break, % | 1.1 to 3.4 | |
| 4.2 |
| Fatigue Strength, MPa | 97 to 120 | |
| 190 |
| Poisson's Ratio | 0.33 | |
| 0.29 |
| Shear Modulus, GPa | 26 | |
| 17 |
| Shear Strength, MPa | 200 | |
| 160 |
| Tensile Strength: Ultimate (UTS), MPa | 340 to 360 | |
| 280 |
| Tensile Strength: Yield (Proof), MPa | 270 to 310 | |
| 260 |
Thermal Properties
| Latent Heat of Fusion, J/g | 400 | |
| 340 |
| Maximum Temperature: Mechanical, °C | 180 | |
| 120 |
| Melting Completion (Liquidus), °C | 640 | |
| 600 |
| Melting Onset (Solidus), °C | 570 | |
| 540 |
| Specific Heat Capacity, J/kg-K | 900 | |
| 970 |
| Thermal Conductivity, W/m-K | 130 | |
| 110 |
| Thermal Expansion, µm/m-K | 24 | |
| 26 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 33 | |
| 27 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 110 | |
| 130 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 9.5 | |
| 13 |
| Density, g/cm3 | 2.7 | |
| 1.8 |
| Embodied Carbon, kg CO2/kg material | 8.8 | |
| 24 |
| Embodied Energy, MJ/kg | 150 | |
| 160 |
| Embodied Water, L/kg | 1180 | |
| 950 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 3.6 to 12 | |
| 12 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 550 to 720 | |
| 740 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 50 | |
| 65 |
| Strength to Weight: Axial, points | 35 to 37 | |
| 43 |
| Strength to Weight: Bending, points | 40 to 42 | |
| 53 |
| Thermal Diffusivity, mm2/s | 53 | |
| 62 |
| Thermal Shock Resistance, points | 15 to 16 | |
| 17 |
Alloy Composition
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| Aluminum (Al), % | 94.2 to 96.8 | |
| 0 |
| Chromium (Cr), % | 0 to 0.1 | |
| 0 |
| Copper (Cu), % | 0 to 0.15 | |
| 0 |
| Iron (Fe), % | 0 to 0.35 | |
| 0 |
| Magnesium (Mg), % | 3.0 to 4.0 | |
| 94.2 to 96.1 |
| Manganese (Mn), % | 0.2 to 0.5 | |
| 0 |
| Silicon (Si), % | 0 to 0.2 | |
| 0 |
| Titanium (Ti), % | 0 to 0.1 | |
| 0 |
| Zinc (Zn), % | 0 to 0.25 | |
| 3.5 to 4.5 |
| Zirconium (Zr), % | 0 | |
| 0.45 to 1.0 |
| Residuals, % | 0 to 0.15 | |
| 0 to 0.3 |