EV31A Magnesium vs. 5251 Aluminum
EV31A magnesium belongs to the magnesium alloys classification, while 5251 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 5251 aluminum.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 70 | |
| 44 to 79 |
| Elastic (Young's, Tensile) Modulus, GPa | 44 | |
| 68 |
| Elongation at Break, % | 3.5 | |
| 2.0 to 19 |
| Fatigue Strength, MPa | 120 | |
| 59 to 110 |
| Poisson's Ratio | 0.27 | |
| 0.33 |
| Shear Modulus, GPa | 17 | |
| 26 |
| Shear Strength, MPa | 170 | |
| 110 to 160 |
| Tensile Strength: Ultimate (UTS), MPa | 260 | |
| 180 to 280 |
| Tensile Strength: Yield (Proof), MPa | 170 | |
| 67 to 250 |
Thermal Properties
| Maximum Temperature: Mechanical, °C | 200 | |
| 180 |
| Melting Onset (Solidus), °C | 590 | |
| 610 |
| Specific Heat Capacity, J/kg-K | 1000 | |
| 900 |
| Thermal Conductivity, W/m-K | 86 | |
| 150 |
| Thermal Expansion, µm/m-K | 27 | |
| 24 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 18 | |
| 37 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 90 | |
| 120 |
Otherwise Unclassified Properties
| Density, g/cm3 | 1.8 | |
| 2.7 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 8.1 | |
| 5.4 to 27 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 330 | |
| 33 to 450 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 65 | |
| 50 |
| Strength to Weight: Axial, points | 40 | |
| 18 to 29 |
| Strength to Weight: Bending, points | 50 | |
| 26 to 35 |
| Thermal Diffusivity, mm2/s | 47 | |
| 61 |
| Thermal Shock Resistance, points | 16 | |
| 7.9 to 13 |