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EV31A Magnesium vs. SAE-AISI D5 Steel

EV31A magnesium belongs to the magnesium alloys classification, while SAE-AISI D5 steel belongs to the iron alloys. There are 19 material properties with values for both materials. Properties with values for just one material (15, 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 D5 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 44
190
Elongation at Break, % 3.5
5.4 to 14
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 17
75
Shear Strength, MPa 170
470 to 1180
Tensile Strength: Ultimate (UTS), MPa 260
770 to 2030

Thermal Properties

Melting Onset (Solidus), °C 590
1390
Specific Heat Capacity, J/kg-K 1000
480
Thermal Conductivity, W/m-K 86
27
Thermal Expansion, µm/m-K 27
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 18
4.2
Electrical Conductivity: Equal Weight (Specific), % IACS 90
4.9

Otherwise Unclassified Properties

Density, g/cm3 1.8
7.7

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 65
25
Strength to Weight: Axial, points 40
28 to 73
Strength to Weight: Bending, points 50
24 to 46
Thermal Diffusivity, mm2/s 47
7.4
Thermal Shock Resistance, points 16
26 to 67