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EV31A Magnesium vs. S31266 Stainless Steel

EV31A magnesium belongs to the magnesium alloys classification, while S31266 stainless steel belongs to the iron alloys. There are 24 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 S31266 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 44
210
Elongation at Break, % 3.5
40
Fatigue Strength, MPa 120
400
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 17
81
Shear Strength, MPa 170
590
Tensile Strength: Ultimate (UTS), MPa 260
860
Tensile Strength: Yield (Proof), MPa 170
470

Thermal Properties

Maximum Temperature: Mechanical, °C 200
1100
Melting Onset (Solidus), °C 590
1420
Specific Heat Capacity, J/kg-K 1000
460
Thermal Conductivity, W/m-K 86
12
Thermal Expansion, µm/m-K 27
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 18
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 90
2.0

Otherwise Unclassified Properties

Density, g/cm3 1.8
8.2

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 8.1
290
Resilience: Unit (Modulus of Resilience), kJ/m3 330
540
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 65
24
Strength to Weight: Axial, points 40
29
Strength to Weight: Bending, points 50
24
Thermal Diffusivity, mm2/s 47
3.1
Thermal Shock Resistance, points 16
18