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EV31A Magnesium vs. SAE-AISI S5 Steel

EV31A magnesium belongs to the magnesium alloys classification, while SAE-AISI S5 steel belongs to the iron alloys. There are 17 material properties with values for both materials. Properties with values for just one material (17, 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 SAE-AISI S5 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 44
190
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 17
72
Tensile Strength: Ultimate (UTS), MPa 260
680 to 1940

Thermal Properties

Melting Onset (Solidus), °C 590
1400
Specific Heat Capacity, J/kg-K 1000
480
Thermal Conductivity, W/m-K 86
42
Thermal Expansion, µm/m-K 27
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 18
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 90
8.7

Otherwise Unclassified Properties

Density, g/cm3 1.8
7.7

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 65
25
Strength to Weight: Axial, points 40
25 to 70
Strength to Weight: Bending, points 50
22 to 45
Thermal Diffusivity, mm2/s 47
11
Thermal Shock Resistance, points 16
23 to 65