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AISI 384 Stainless Steel vs. AZ92A Magnesium

AISI 384 stainless steel belongs to the iron alloys classification, while AZ92A magnesium belongs to the magnesium alloys. There are 24 material properties with values for both materials. Properties with values for just one material (10, 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 384 stainless steel and the bottom bar is AZ92A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
47
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
18
Tensile Strength: Ultimate (UTS), MPa 480
170 to 270

Thermal Properties

Latent Heat of Fusion, J/g 290
350
Maximum Temperature: Mechanical, °C 910
130
Melting Completion (Liquidus), °C 1420
590
Melting Onset (Solidus), °C 1380
440
Specific Heat Capacity, J/kg-K 480
980
Thermal Conductivity, W/m-K 16
44 to 58
Thermal Expansion, µm/m-K 16
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
11 to 12
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
53 to 62

Otherwise Unclassified Properties

Base Metal Price, % relative 20
12
Density, g/cm3 7.9
1.8
Embodied Carbon, kg CO2/kg material 3.7
22
Embodied Energy, MJ/kg 52
160
Embodied Water, L/kg 150
980

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
67
Strength to Weight: Axial, points 17
26 to 41
Strength to Weight: Bending, points 17
38 to 51
Thermal Diffusivity, mm2/s 4.3
25 to 33
Thermal Shock Resistance, points 11
10 to 16

Alloy Composition

Aluminum (Al), % 0
8.3 to 9.7
Carbon (C), % 0 to 0.040
0
Chromium (Cr), % 15 to 17
0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 60.9 to 68
0
Magnesium (Mg), % 0
86.7 to 90
Manganese (Mn), % 0 to 2.0
0.1 to 0.35
Nickel (Ni), % 17 to 19
0 to 0.010
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 1.0
0 to 0.3
Sulfur (S), % 0 to 0.030
0
Zinc (Zn), % 0
1.6 to 2.4
Residuals, % 0
0 to 0.3