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EN 1.4740 Stainless Steel vs. EV31A Magnesium

EN 1.4740 stainless steel belongs to the iron alloys classification, while EV31A magnesium belongs to the magnesium alloys. There are 16 material properties with values for both materials. Properties with values for just one material (19, 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 EN 1.4740 stainless steel and the bottom bar is EV31A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
70
Elastic (Young's, Tensile) Modulus, GPa 200
44
Elongation at Break, % 22
3.5
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 77
17

Thermal Properties

Maximum Temperature: Mechanical, °C 900
200
Melting Onset (Solidus), °C 1370
590
Specific Heat Capacity, J/kg-K 490
1000
Thermal Conductivity, W/m-K 18
86
Thermal Expansion, µm/m-K 10
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
18
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
90

Otherwise Unclassified Properties

Density, g/cm3 7.6
1.8

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
65
Thermal Diffusivity, mm2/s 4.8
47