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EQ21A Magnesium vs. SAE-AISI T6 Steel

EQ21A magnesium belongs to the magnesium alloys classification, while SAE-AISI T6 steel belongs to the iron alloys. There are 20 material properties with values for both materials. Properties with values for just one material (15, 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 EQ21A magnesium and the bottom bar is SAE-AISI T6 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 44
210
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 17
81
Tensile Strength: Ultimate (UTS), MPa 250
880 to 2150

Thermal Properties

Latent Heat of Fusion, J/g 340
250
Melting Completion (Liquidus), °C 640
1830
Melting Onset (Solidus), °C 560
1770
Specific Heat Capacity, J/kg-K 980
400
Thermal Conductivity, W/m-K 110
18
Thermal Expansion, µm/m-K 27
12

Otherwise Unclassified Properties

Base Metal Price, % relative 80
70
Density, g/cm3 1.9
9.5
Embodied Carbon, kg CO2/kg material 27
11
Embodied Energy, MJ/kg 210
170

Common Calculations

Stiffness to Weight: Axial, points 13
12
Stiffness to Weight: Bending, points 63
21
Strength to Weight: Axial, points 37
26 to 63
Strength to Weight: Bending, points 47
21 to 39
Thermal Diffusivity, mm2/s 62
4.7
Thermal Shock Resistance, points 15
26 to 64

Alloy Composition

Carbon (C), % 0
0.75 to 0.85
Chromium (Cr), % 0
4.0 to 4.8
Cobalt (Co), % 0
11 to 13
Copper (Cu), % 0.050 to 0.1
0 to 0.25
Iron (Fe), % 0
55.9 to 63.5
Magnesium (Mg), % 93.9 to 96.8
0
Manganese (Mn), % 0
0.2 to 0.4
Molybdenum (Mo), % 0
0.4 to 1.0
Nickel (Ni), % 0 to 0.010
0 to 0.3
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0
0.2 to 0.4
Silver (Ag), % 1.3 to 1.7
0
Sulfur (S), % 0
0 to 0.030
Tungsten (W), % 0
18.5 to 21
Unspecified Rare Earths, % 1.5 to 3.0
0
Vanadium (V), % 0
1.5 to 2.1
Zirconium (Zr), % 0.4 to 1.0
0
Residuals, % 0 to 0.3
0