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ISO-WD32250 Magnesium vs. AISI 384 Stainless Steel

ISO-WD32250 magnesium belongs to the magnesium alloys classification, while AISI 384 stainless steel belongs to the iron alloys. There are 24 material properties with values for both materials. Properties with values for just one material (9, 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 ISO-WD32250 magnesium and the bottom bar is AISI 384 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 17
76
Tensile Strength: Ultimate (UTS), MPa 310 to 330
480

Thermal Properties

Latent Heat of Fusion, J/g 340
290
Maximum Temperature: Mechanical, °C 120
910
Melting Completion (Liquidus), °C 600
1420
Melting Onset (Solidus), °C 550
1380
Specific Heat Capacity, J/kg-K 980
480
Thermal Conductivity, W/m-K 130
16
Thermal Expansion, µm/m-K 26
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 130
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 13
20
Density, g/cm3 1.8
7.9
Embodied Carbon, kg CO2/kg material 24
3.7
Embodied Energy, MJ/kg 160
52
Embodied Water, L/kg 950
150

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 67
24
Strength to Weight: Axial, points 49 to 51
17
Strength to Weight: Bending, points 58 to 60
17
Thermal Diffusivity, mm2/s 72
4.3
Thermal Shock Resistance, points 19 to 20
11

Alloy Composition


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Carbon (C), % 0
0 to 0.040
Chromium (Cr), % 0
15 to 17
Iron (Fe), % 0
60.9 to 68
Magnesium (Mg), % 94.9 to 97.1
0
Manganese (Mn), % 0
0 to 2.0
Nickel (Ni), % 0
17 to 19
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Zinc (Zn), % 2.5 to 4.0
0
Zirconium (Zr), % 0.45 to 0.8
0
Residuals, % 0 to 0.3
0