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AISI 305 Stainless Steel vs. EV31A Magnesium

AISI 305 stainless steel belongs to the iron alloys classification, while EV31A magnesium belongs to the magnesium 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 AISI 305 stainless steel and the bottom bar is EV31A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 220
70
Elastic (Young's, Tensile) Modulus, GPa 200
44
Elongation at Break, % 34 to 45
3.5
Fatigue Strength, MPa 210 to 280
120
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 77
17
Shear Strength, MPa 400 to 470
170
Tensile Strength: Ultimate (UTS), MPa 580 to 710
260
Tensile Strength: Yield (Proof), MPa 230 to 350
170

Thermal Properties

Maximum Temperature: Mechanical, °C 540
200
Melting Onset (Solidus), °C 1400
590
Specific Heat Capacity, J/kg-K 480
1000
Thermal Conductivity, W/m-K 16
86
Thermal Expansion, µm/m-K 17
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
18
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
90

Otherwise Unclassified Properties

Density, g/cm3 7.8
1.8

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200 to 210
8.1
Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 320
330
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
65
Strength to Weight: Axial, points 20 to 25
40
Strength to Weight: Bending, points 20 to 23
50
Thermal Diffusivity, mm2/s 4.2
47
Thermal Shock Resistance, points 13 to 15
16