ASTM A209 Steel vs. EV31A Magnesium
ASTM A209 steel belongs to the iron alloys classification, while EV31A magnesium belongs to the magnesium alloys. There are 25 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.
For each property being compared, the top bar is ASTM A209 steel and the bottom bar is EV31A magnesium.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 140 to 150 | |
| 70 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 44 |
| Elongation at Break, % | 34 | |
| 3.5 |
| Fatigue Strength, MPa | 180 to 200 | |
| 120 |
| Poisson's Ratio | 0.29 | |
| 0.27 |
| Shear Modulus, GPa | 73 | |
| 17 |
| Shear Strength, MPa | 280 to 310 | |
| 170 |
| Tensile Strength: Ultimate (UTS), MPa | 420 to 460 | |
| 260 |
| Tensile Strength: Yield (Proof), MPa | 220 to 250 | |
| 170 |
Thermal Properties
| Maximum Temperature: Mechanical, °C | 410 | |
| 200 |
| Melting Onset (Solidus), °C | 1420 to 1430 | |
| 590 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 1000 |
| Thermal Conductivity, W/m-K | 50 | |
| 86 |
| Thermal Expansion, µm/m-K | 13 | |
| 27 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.1 | |
| 18 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.1 to 8.2 | |
| 90 |
Otherwise Unclassified Properties
| Density, g/cm3 | 7.9 | |
| 1.8 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 to 130 | |
| 8.1 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 130 to 170 | |
| 330 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 65 |
| Strength to Weight: Axial, points | 15 to 16 | |
| 40 |
| Strength to Weight: Bending, points | 16 to 17 | |
| 50 |
| Thermal Diffusivity, mm2/s | 13 | |
| 47 |
| Thermal Shock Resistance, points | 12 to 14 | |
| 16 |