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EV31A Magnesium vs. SAE-AISI 1144 Steel

EV31A magnesium belongs to the magnesium alloys classification, while SAE-AISI 1144 steel belongs to the iron 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 EV31A magnesium and the bottom bar is SAE-AISI 1144 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 70
220 to 230
Elastic (Young's, Tensile) Modulus, GPa 44
190
Elongation at Break, % 3.5
11 to 17
Fatigue Strength, MPa 120
280 to 430
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 17
72
Shear Strength, MPa 170
460 to 510
Tensile Strength: Ultimate (UTS), MPa 260
750 to 840
Tensile Strength: Yield (Proof), MPa 170
420 to 690

Thermal Properties

Maximum Temperature: Mechanical, °C 200
400
Melting Onset (Solidus), °C 590
1410
Specific Heat Capacity, J/kg-K 1000
470
Thermal Conductivity, W/m-K 86
51
Thermal Expansion, µm/m-K 27
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 18
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 90
8.2

Otherwise Unclassified Properties

Density, g/cm3 1.8
7.8

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 8.1
91 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 330
480 to 1290
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 65
24
Strength to Weight: Axial, points 40
27 to 30
Strength to Weight: Bending, points 50
23 to 25
Thermal Diffusivity, mm2/s 47
14
Thermal Shock Resistance, points 16
22 to 24