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EV31A Magnesium vs. ASTM A372 Grade E Steel

EV31A magnesium belongs to the magnesium alloys classification, while ASTM A372 grade E steel belongs to the iron 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. 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 EV31A magnesium and the bottom bar is ASTM A372 grade E steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 70
200 to 280
Elastic (Young's, Tensile) Modulus, GPa 44
190
Elongation at Break, % 3.5
20 to 22
Fatigue Strength, MPa 120
310 to 380
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 17
73
Shear Strength, MPa 170
410 to 570
Tensile Strength: Ultimate (UTS), MPa 260
650 to 910
Tensile Strength: Yield (Proof), MPa 170
430 to 550

Thermal Properties

Maximum Temperature: Mechanical, °C 200
420
Melting Onset (Solidus), °C 590
1420
Specific Heat Capacity, J/kg-K 1000
470
Thermal Conductivity, W/m-K 86
44
Thermal Expansion, µm/m-K 27
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 18
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 90
8.3

Otherwise Unclassified Properties

Density, g/cm3 1.8
7.8

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 8.1
130 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 330
500 to 810
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 65
24
Strength to Weight: Axial, points 40
23 to 32
Strength to Weight: Bending, points 50
21 to 27
Thermal Diffusivity, mm2/s 47
12
Thermal Shock Resistance, points 16
19 to 27