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EV31A Magnesium vs. SAE-AISI 9254 Steel

EV31A magnesium belongs to the magnesium alloys classification, while SAE-AISI 9254 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 SAE-AISI 9254 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 70
200
Elastic (Young's, Tensile) Modulus, GPa 44
190
Elongation at Break, % 3.5
20
Fatigue Strength, MPa 120
280
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 17
72
Shear Strength, MPa 170
410
Tensile Strength: Ultimate (UTS), MPa 260
660
Tensile Strength: Yield (Proof), MPa 170
410

Thermal Properties

Maximum Temperature: Mechanical, °C 200
410
Melting Onset (Solidus), °C 590
1400
Specific Heat Capacity, J/kg-K 1000
480
Thermal Conductivity, W/m-K 86
46
Thermal Expansion, µm/m-K 27
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 18
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 90
8.6

Otherwise Unclassified Properties

Density, g/cm3 1.8
7.7

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 8.1
110
Resilience: Unit (Modulus of Resilience), kJ/m3 330
450
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 65
25
Strength to Weight: Axial, points 40
24
Strength to Weight: Bending, points 50
22
Thermal Diffusivity, mm2/s 47
12
Thermal Shock Resistance, points 16
20