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EN-MC65220 Magnesium vs. SAE-AISI S5 Steel

EN-MC65220 magnesium belongs to the magnesium alloys classification, while SAE-AISI S5 steel belongs to the iron alloys. There are 22 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 EN-MC65220 magnesium and the bottom bar is SAE-AISI S5 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 44
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 17
72
Tensile Strength: Ultimate (UTS), MPa 270
680 to 1940

Thermal Properties

Latent Heat of Fusion, J/g 340
280
Melting Completion (Liquidus), °C 610
1440
Melting Onset (Solidus), °C 550
1400
Specific Heat Capacity, J/kg-K 980
480
Thermal Conductivity, W/m-K 110
42
Thermal Expansion, µm/m-K 26
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 120
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 80
3.1
Density, g/cm3 1.9
7.7
Embodied Carbon, kg CO2/kg material 27
2.1
Embodied Energy, MJ/kg 210
29

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 62
25
Strength to Weight: Axial, points 40
25 to 70
Strength to Weight: Bending, points 49
22 to 45
Thermal Diffusivity, mm2/s 61
11
Thermal Shock Resistance, points 17
23 to 65

Alloy Composition


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Carbon (C), % 0
0.5 to 0.65
Chromium (Cr), % 0
0 to 0.5
Copper (Cu), % 0.050 to 0.1
0 to 0.25
Iron (Fe), % 0 to 0.010
93.6 to 97
Magnesium (Mg), % 93.8 to 96.8
0
Manganese (Mn), % 0 to 0.15
0.6 to 1.0
Molybdenum (Mo), % 0
0.2 to 1.4
Nickel (Ni), % 0 to 0.0050
0
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.010
1.8 to 2.3
Silver (Ag), % 1.3 to 1.7
0
Sulfur (S), % 0
0 to 0.030
Unspecified Rare Earths, % 1.5 to 3.0
0
Vanadium (V), % 0
0 to 0.35
Zinc (Zn), % 0 to 0.2
0
Zirconium (Zr), % 0.4 to 1.0
0
Residuals, % 0 to 0.010
0