EV31A Magnesium vs. 7020 Aluminum
EV31A magnesium belongs to the magnesium alloys classification, while 7020 aluminum belongs to the aluminum alloys. There are 25 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.
For each property being compared, the top bar is EV31A magnesium and the bottom bar is 7020 aluminum.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 70 | |
| 45 to 100 |
| Elastic (Young's, Tensile) Modulus, GPa | 44 | |
| 70 |
| Elongation at Break, % | 3.5 | |
| 8.4 to 14 |
| Fatigue Strength, MPa | 120 | |
| 110 to 130 |
| Poisson's Ratio | 0.27 | |
| 0.33 |
| Shear Modulus, GPa | 17 | |
| 26 |
| Shear Strength, MPa | 170 | |
| 110 to 230 |
| Tensile Strength: Ultimate (UTS), MPa | 260 | |
| 190 to 390 |
| Tensile Strength: Yield (Proof), MPa | 170 | |
| 120 to 310 |
Thermal Properties
| Maximum Temperature: Mechanical, °C | 200 | |
| 210 |
| Melting Onset (Solidus), °C | 590 | |
| 610 |
| Specific Heat Capacity, J/kg-K | 1000 | |
| 880 |
| Thermal Conductivity, W/m-K | 86 | |
| 150 |
| Thermal Expansion, µm/m-K | 27 | |
| 23 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 18 | |
| 39 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 90 | |
| 120 |
Otherwise Unclassified Properties
| Density, g/cm3 | 1.8 | |
| 2.9 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 8.1 | |
| 23 to 46 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 330 | |
| 110 to 690 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 65 | |
| 47 |
| Strength to Weight: Axial, points | 40 | |
| 18 to 37 |
| Strength to Weight: Bending, points | 50 | |
| 25 to 41 |
| Thermal Diffusivity, mm2/s | 47 | |
| 59 |
| Thermal Shock Resistance, points | 16 | |
| 8.3 to 17 |