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EN-MC65210 Magnesium vs. SAE-AISI P20 Steel

EN-MC65210 magnesium belongs to the magnesium alloys classification, while SAE-AISI P20 steel belongs to the iron alloys. There are 21 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 EN-MC65210 magnesium and the bottom bar is SAE-AISI P20 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
73
Tensile Strength: Ultimate (UTS), MPa 270
540 to 1050

Thermal Properties

Latent Heat of Fusion, J/g 340
260
Melting Completion (Liquidus), °C 610
1460
Melting Onset (Solidus), °C 540
1420
Specific Heat Capacity, J/kg-K 970
470
Thermal Conductivity, W/m-K 110
45
Thermal Expansion, µm/m-K 26
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 110
8.5

Otherwise Unclassified Properties

Density, g/cm3 2.0
7.8
Embodied Carbon, kg CO2/kg material 27
1.6
Embodied Energy, MJ/kg 220
21

Common Calculations

Stiffness to Weight: Axial, points 12
13
Stiffness to Weight: Bending, points 59
24
Strength to Weight: Axial, points 38
19 to 37
Strength to Weight: Bending, points 47
19 to 29
Thermal Diffusivity, mm2/s 58
12
Thermal Shock Resistance, points 17
18 to 35

Alloy Composition


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Carbon (C), % 0
0.28 to 0.4
Chromium (Cr), % 0
0.4 to 2.0
Copper (Cu), % 0 to 0.030
0 to 0.25
Iron (Fe), % 0 to 0.010
95.2 to 98.5
Magnesium (Mg), % 92.6 to 95.6
0
Manganese (Mn), % 0 to 0.15
0.35 to 0.71
Molybdenum (Mo), % 0
0.3 to 0.55
Nickel (Ni), % 0 to 0.0050
0
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.010
0.2 to 0.8
Silver (Ag), % 2.0 to 3.0
0
Sulfur (S), % 0
0 to 0.030
Unspecified Rare Earths, % 2.0 to 3.0
0
Zinc (Zn), % 0 to 0.2
0
Zirconium (Zr), % 0.4 to 1.0
0
Residuals, % 0 to 0.010
0