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QE22A Magnesium vs. SAE-AISI T4 Steel

QE22A magnesium belongs to the magnesium alloys classification, while SAE-AISI T4 steel belongs to the iron alloys. There are 19 material properties with values for both materials. Properties with values for just one material (16, 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 QE22A magnesium and the bottom bar is SAE-AISI T4 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
80
Tensile Strength: Ultimate (UTS), MPa 250
800 to 2140

Thermal Properties

Latent Heat of Fusion, J/g 340
250
Melting Completion (Liquidus), °C 640
1810
Melting Onset (Solidus), °C 570
1750
Specific Heat Capacity, J/kg-K 970
410
Thermal Conductivity, W/m-K 110
21
Thermal Expansion, µm/m-K 27
12

Otherwise Unclassified Properties

Density, g/cm3 2.0
9.4
Embodied Carbon, kg CO2/kg material 27
8.5
Embodied Energy, MJ/kg 220
130

Common Calculations

Stiffness to Weight: Axial, points 13
12
Stiffness to Weight: Bending, points 60
21
Strength to Weight: Axial, points 36
24 to 64
Strength to Weight: Bending, points 46
20 to 39
Thermal Diffusivity, mm2/s 59
5.4
Thermal Shock Resistance, points 15
24 to 64

Alloy Composition

Carbon (C), % 0
0.7 to 0.8
Chromium (Cr), % 0
3.8 to 4.5
Cobalt (Co), % 0
4.3 to 5.8
Copper (Cu), % 0 to 0.1
0 to 0.25
Iron (Fe), % 0
66.3 to 72.3
Magnesium (Mg), % 93.1 to 95.8
0
Manganese (Mn), % 0
0.1 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), % 2.0 to 3.0
0
Sulfur (S), % 0
0 to 0.030
Tungsten (W), % 0
17.5 to 19
Unspecified Rare Earths, % 1.8 to 2.5
0
Vanadium (V), % 0
0.8 to 1.2
Zirconium (Zr), % 0.4 to 1.0
0
Residuals, % 0 to 0.3
0