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ASTM A36 Carbon Steel vs. EV31A Magnesium

ASTM A36 carbon steel belongs to the iron alloys classification, while EV31A magnesium belongs to the magnesium 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 ASTM A36 carbon steel and the bottom bar is EV31A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
70
Elastic (Young's, Tensile) Modulus, GPa 190
44
Elongation at Break, % 22
3.5
Fatigue Strength, MPa 200
120
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 73
17
Shear Strength, MPa 300
170
Tensile Strength: Ultimate (UTS), MPa 480
260
Tensile Strength: Yield (Proof), MPa 290
170

Thermal Properties

Maximum Temperature: Mechanical, °C 400
200
Melting Onset (Solidus), °C 1420
590
Specific Heat Capacity, J/kg-K 470
1000
Thermal Conductivity, W/m-K 50
86
Thermal Expansion, µm/m-K 11
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 12
18
Electrical Conductivity: Equal Weight (Specific), % IACS 14
90

Otherwise Unclassified Properties

Density, g/cm3 7.9
1.8

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 92
8.1
Resilience: Unit (Modulus of Resilience), kJ/m3 220
330
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
65
Strength to Weight: Axial, points 17
40
Strength to Weight: Bending, points 17
50
Thermal Diffusivity, mm2/s 14
47
Thermal Shock Resistance, points 16
16