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EV31A Magnesium vs. SAE-AISI 1045 Steel

EV31A magnesium belongs to the magnesium alloys classification, while SAE-AISI 1045 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 1045 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 70
180 to 190
Elastic (Young's, Tensile) Modulus, GPa 44
190
Elongation at Break, % 3.5
13 to 18
Fatigue Strength, MPa 120
220 to 370
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 17
72
Shear Strength, MPa 170
380 to 410
Tensile Strength: Ultimate (UTS), MPa 260
620 to 680
Tensile Strength: Yield (Proof), MPa 170
330 to 580

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
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 90
8.1

Otherwise Unclassified Properties

Density, g/cm3 1.8
7.8

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 8.1
84 to 93
Resilience: Unit (Modulus of Resilience), kJ/m3 330
300 to 900
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 65
24
Strength to Weight: Axial, points 40
22 to 24
Strength to Weight: Bending, points 50
21 to 22
Thermal Diffusivity, mm2/s 47
14
Thermal Shock Resistance, points 16
20 to 22