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EN-MC65120 Magnesium vs. SAE-AISI T8 Steel

EN-MC65120 magnesium belongs to the magnesium alloys classification, while SAE-AISI T8 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-MC65120 magnesium and the bottom bar is SAE-AISI T8 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
200
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 17
78
Tensile Strength: Ultimate (UTS), MPa 160
780 to 2140

Thermal Properties

Latent Heat of Fusion, J/g 330
250
Melting Completion (Liquidus), °C 590
1730
Melting Onset (Solidus), °C 520
1670
Specific Heat Capacity, J/kg-K 970
420
Thermal Conductivity, W/m-K 100
18
Thermal Expansion, µm/m-K 26
12

Otherwise Unclassified Properties

Base Metal Price, % relative 25
45
Density, g/cm3 1.9
9.0
Embodied Carbon, kg CO2/kg material 25
10
Embodied Energy, MJ/kg 190
160
Embodied Water, L/kg 930
120

Common Calculations

Stiffness to Weight: Axial, points 13
12
Stiffness to Weight: Bending, points 62
22
Strength to Weight: Axial, points 23
24 to 66
Strength to Weight: Bending, points 34
21 to 41
Thermal Diffusivity, mm2/s 56
4.8
Thermal Shock Resistance, points 9.8
24 to 66

Alloy Composition

Carbon (C), % 0
0.75 to 0.85
Chromium (Cr), % 0
3.8 to 4.5
Cobalt (Co), % 0
4.3 to 5.8
Copper (Cu), % 0 to 0.030
0 to 0.25
Iron (Fe), % 0 to 0.010
69.3 to 75.4
Magnesium (Mg), % 91.8 to 95.1
0
Manganese (Mn), % 0 to 0.15
0.2 to 0.4
Molybdenum (Mo), % 0
0.4 to 1.0
Nickel (Ni), % 0 to 0.0050
0 to 0.3
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.010
0.2 to 0.4
Sulfur (S), % 0
0 to 0.030
Tungsten (W), % 0
13.3 to 14.8
Unspecified Rare Earths, % 2.5 to 4.0
0
Vanadium (V), % 0
1.8 to 2.4
Zinc (Zn), % 2.0 to 3.0
0
Zirconium (Zr), % 0.4 to 1.0
0
Residuals, % 0 to 0.010
0