2018 Aluminum vs. EQ21A Magnesium
2018 aluminum belongs to the aluminum alloys classification, while EQ21A magnesium belongs to the magnesium alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.
For each property being compared, the top bar is 2018 aluminum and the bottom bar is EQ21A magnesium.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 120 | |
| 80 |
| Elastic (Young's, Tensile) Modulus, GPa | 73 | |
| 44 |
| Elongation at Break, % | 9.6 | |
| 2.4 |
| Fatigue Strength, MPa | 120 | |
| 110 |
| Poisson's Ratio | 0.33 | |
| 0.29 |
| Shear Modulus, GPa | 27 | |
| 17 |
| Shear Strength, MPa | 270 | |
| 150 |
| Tensile Strength: Ultimate (UTS), MPa | 420 | |
| 250 |
| Tensile Strength: Yield (Proof), MPa | 310 | |
| 190 |
Thermal Properties
| Latent Heat of Fusion, J/g | 390 | |
| 340 |
| Maximum Temperature: Mechanical, °C | 220 | |
| 160 |
| Melting Completion (Liquidus), °C | 640 | |
| 640 |
| Melting Onset (Solidus), °C | 510 | |
| 560 |
| Specific Heat Capacity, J/kg-K | 870 | |
| 980 |
| Thermal Conductivity, W/m-K | 150 | |
| 110 |
| Thermal Expansion, µm/m-K | 22 | |
| 27 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 40 | |
| 25 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 120 | |
| 120 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 11 | |
| 80 |
| Density, g/cm3 | 3.1 | |
| 1.9 |
| Embodied Carbon, kg CO2/kg material | 8.1 | |
| 27 |
| Embodied Energy, MJ/kg | 150 | |
| 210 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 37 | |
| 5.6 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 670 | |
| 410 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 45 | |
| 63 |
| Strength to Weight: Axial, points | 38 | |
| 37 |
| Strength to Weight: Bending, points | 41 | |
| 47 |
| Thermal Diffusivity, mm2/s | 57 | |
| 62 |
| Thermal Shock Resistance, points | 19 | |
| 15 |
Alloy Composition
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| Aluminum (Al), % | 89.7 to 94.4 | |
| 0 |
| Chromium (Cr), % | 0 to 0.1 | |
| 0 |
| Copper (Cu), % | 3.5 to 4.5 | |
| 0.050 to 0.1 |
| Iron (Fe), % | 0 to 1.0 | |
| 0 |
| Magnesium (Mg), % | 0.45 to 0.9 | |
| 93.9 to 96.8 |
| Manganese (Mn), % | 0 to 0.2 | |
| 0 |
| Nickel (Ni), % | 1.7 to 2.3 | |
| 0 to 0.010 |
| Silicon (Si), % | 0 to 0.9 | |
| 0 |
| Silver (Ag), % | 0 | |
| 1.3 to 1.7 |
| Unspecified Rare Earths, % | 0 | |
| 1.5 to 3.0 |
| Zinc (Zn), % | 0 to 0.25 | |
| 0 |
| Zirconium (Zr), % | 0 | |
| 0.4 to 1.0 |
| Residuals, % | 0 to 0.15 | |
| 0 to 0.3 |