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EV31A Magnesium vs. S46800 Stainless Steel

EV31A magnesium belongs to the magnesium alloys classification, while S46800 stainless steel belongs to the iron alloys. There are 25 material properties with values for both materials. Properties with values for just one material (11, 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 S46800 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 70
180
Elastic (Young's, Tensile) Modulus, GPa 44
200
Elongation at Break, % 3.5
25
Fatigue Strength, MPa 120
160
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 17
77
Shear Strength, MPa 170
300
Tensile Strength: Ultimate (UTS), MPa 260
470
Tensile Strength: Yield (Proof), MPa 170
230

Thermal Properties

Maximum Temperature: Mechanical, °C 200
920
Melting Onset (Solidus), °C 590
1400
Specific Heat Capacity, J/kg-K 1000
480
Thermal Conductivity, W/m-K 86
23
Thermal Expansion, µm/m-K 27
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 18
2.8
Electrical Conductivity: Equal Weight (Specific), % IACS 90
3.3

Otherwise Unclassified Properties

Density, g/cm3 1.8
7.7

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 8.1
98
Resilience: Unit (Modulus of Resilience), kJ/m3 330
130
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 65
25
Strength to Weight: Axial, points 40
17
Strength to Weight: Bending, points 50
18
Thermal Diffusivity, mm2/s 47
6.1
Thermal Shock Resistance, points 16
16