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QE22A Magnesium vs. SAE-AISI 1144 Steel

QE22A magnesium belongs to the magnesium alloys classification, while SAE-AISI 1144 steel belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (6, 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 1144 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 80
220 to 230
Elastic (Young's, Tensile) Modulus, GPa 44
190
Elongation at Break, % 2.4
11 to 17
Fatigue Strength, MPa 110
280 to 430
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 17
72
Shear Strength, MPa 150
460 to 510
Tensile Strength: Ultimate (UTS), MPa 250
750 to 840
Tensile Strength: Yield (Proof), MPa 190
420 to 690

Thermal Properties

Latent Heat of Fusion, J/g 340
250
Maximum Temperature: Mechanical, °C 250
400
Melting Completion (Liquidus), °C 640
1450
Melting Onset (Solidus), °C 570
1410
Specific Heat Capacity, J/kg-K 970
470
Thermal Conductivity, W/m-K 110
51
Thermal Expansion, µm/m-K 27
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 120
8.2

Otherwise Unclassified Properties

Density, g/cm3 2.0
7.8
Embodied Carbon, kg CO2/kg material 27
1.4
Embodied Energy, MJ/kg 220
19

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.5
91 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 400
480 to 1290
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 60
24
Strength to Weight: Axial, points 36
27 to 30
Strength to Weight: Bending, points 46
23 to 25
Thermal Diffusivity, mm2/s 59
14
Thermal Shock Resistance, points 15
22 to 24

Alloy Composition

Carbon (C), % 0
0.4 to 0.48
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 0
97.5 to 98
Magnesium (Mg), % 93.1 to 95.8
0
Manganese (Mn), % 0
1.4 to 1.7
Nickel (Ni), % 0 to 0.010
0
Phosphorus (P), % 0
0 to 0.040
Silver (Ag), % 2.0 to 3.0
0
Sulfur (S), % 0
0.24 to 0.33
Unspecified Rare Earths, % 1.8 to 2.5
0
Zirconium (Zr), % 0.4 to 1.0
0
Residuals, % 0 to 0.3
0