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EV31A Magnesium vs. ACI-ASTM CD3MCuN Steel

EV31A magnesium belongs to the magnesium alloys classification, while ACI-ASTM CD3MCuN steel belongs to the iron alloys. There are 23 material properties with values for both materials. Properties with values for just one material (12, 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 ACI-ASTM CD3MCuN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 44
200
Elongation at Break, % 3.5
29
Fatigue Strength, MPa 120
370
Poisson's Ratio 0.27
0.27
Shear Modulus, GPa 17
80
Tensile Strength: Ultimate (UTS), MPa 260
790
Tensile Strength: Yield (Proof), MPa 170
500

Thermal Properties

Maximum Temperature: Mechanical, °C 200
1100
Melting Onset (Solidus), °C 590
1390
Specific Heat Capacity, J/kg-K 1000
480
Thermal Conductivity, W/m-K 86
15
Thermal Expansion, µm/m-K 27
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 18
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 90
2.5

Otherwise Unclassified Properties

Density, g/cm3 1.8
7.8

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 8.1
200
Resilience: Unit (Modulus of Resilience), kJ/m3 330
620
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 65
25
Strength to Weight: Axial, points 40
28
Strength to Weight: Bending, points 50
24
Thermal Diffusivity, mm2/s 47
4.1
Thermal Shock Resistance, points 16
22