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EN 1.4658 Stainless Steel vs. EV31A Magnesium

EN 1.4658 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 1.4658 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 210
44
Elongation at Break, % 28
3.5
Fatigue Strength, MPa 530
120
Poisson's Ratio 0.27
0.27
Shear Modulus, GPa 81
17
Shear Strength, MPa 580
170
Tensile Strength: Ultimate (UTS), MPa 900
260
Tensile Strength: Yield (Proof), MPa 730
170

Thermal Properties

Maximum Temperature: Mechanical, °C 1100
200
Melting Onset (Solidus), °C 1400
590
Specific Heat Capacity, J/kg-K 470
1000
Thermal Conductivity, W/m-K 16
86
Thermal Expansion, µm/m-K 13
27

Otherwise Unclassified Properties

Density, g/cm3 7.8
1.8

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
8.1
Resilience: Unit (Modulus of Resilience), kJ/m3 1280
330
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 25
65
Strength to Weight: Axial, points 32
40
Strength to Weight: Bending, points 26
50
Thermal Diffusivity, mm2/s 4.3
47
Thermal Shock Resistance, points 24
16