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EV31A Magnesium vs. SAE-AISI 1151 Steel

EV31A magnesium belongs to the magnesium alloys classification, while SAE-AISI 1151 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 1151 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 70
210 to 220
Elastic (Young's, Tensile) Modulus, GPa 44
190
Elongation at Break, % 3.5
11 to 17
Fatigue Strength, MPa 120
260 to 410
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 17
72
Shear Strength, MPa 170
430 to 480
Tensile Strength: Ultimate (UTS), MPa 260
710 to 800
Tensile Strength: Yield (Proof), MPa 170
390 to 660

Thermal Properties

Maximum Temperature: Mechanical, °C 200
400
Melting Onset (Solidus), °C 590
1420
Specific Heat Capacity, J/kg-K 1000
470
Thermal Conductivity, W/m-K 86
51
Thermal Expansion, µm/m-K 27
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 18
10
Electrical Conductivity: Equal Weight (Specific), % IACS 90
12

Otherwise Unclassified Properties

Density, g/cm3 1.8
7.8

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 8.1
86 to 100
Resilience: Unit (Modulus of Resilience), kJ/m3 330
400 to 1170
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 65
24
Strength to Weight: Axial, points 40
25 to 28
Strength to Weight: Bending, points 50
22 to 24
Thermal Diffusivity, mm2/s 47
14
Thermal Shock Resistance, points 16
22 to 25