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EN 1.4317 Stainless Steel vs. EV31A Magnesium

EN 1.4317 stainless steel belongs to the iron alloys classification, while EV31A magnesium belongs to the magnesium alloys. There are 23 material properties with values for both materials. Properties with values for just one material (13, 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 1.4317 stainless steel and the bottom bar is EV31A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
44
Elongation at Break, % 17
3.5
Fatigue Strength, MPa 380
120
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 76
17
Tensile Strength: Ultimate (UTS), MPa 860
260
Tensile Strength: Yield (Proof), MPa 630
170

Thermal Properties

Maximum Temperature: Mechanical, °C 770
200
Melting Onset (Solidus), °C 1400
590
Specific Heat Capacity, J/kg-K 480
1000
Thermal Conductivity, W/m-K 26
86
Thermal Expansion, µm/m-K 11
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.7
18
Electrical Conductivity: Equal Weight (Specific), % IACS 3.2
90

Otherwise Unclassified Properties

Density, g/cm3 7.8
1.8

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
8.1
Resilience: Unit (Modulus of Resilience), kJ/m3 1010
330
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
65
Strength to Weight: Axial, points 31
40
Strength to Weight: Bending, points 26
50
Thermal Diffusivity, mm2/s 7.0
47
Thermal Shock Resistance, points 30
16