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AWS E385 vs. QE22A Magnesium

AWS E385 belongs to the iron alloys classification, while QE22A magnesium belongs to the magnesium alloys. There are 22 material properties with values for both materials. Properties with values for just one material (13, 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 AWS E385 and the bottom bar is QE22A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
44
Elongation at Break, % 34
2.4
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 79
17
Tensile Strength: Ultimate (UTS), MPa 580
250

Thermal Properties

Latent Heat of Fusion, J/g 300
340
Melting Completion (Liquidus), °C 1440
640
Melting Onset (Solidus), °C 1390
570
Specific Heat Capacity, J/kg-K 460
970
Thermal Conductivity, W/m-K 14
110
Thermal Expansion, µm/m-K 14
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.7
25
Electrical Conductivity: Equal Weight (Specific), % IACS 1.9
120

Otherwise Unclassified Properties

Density, g/cm3 8.1
2.0
Embodied Carbon, kg CO2/kg material 5.8
27
Embodied Energy, MJ/kg 79
220

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
60
Strength to Weight: Axial, points 20
36
Strength to Weight: Bending, points 19
46
Thermal Diffusivity, mm2/s 3.6
59
Thermal Shock Resistance, points 15
15

Alloy Composition

Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 19.5 to 21.5
0
Copper (Cu), % 1.2 to 2.0
0 to 0.1
Iron (Fe), % 41.8 to 50.1
0
Magnesium (Mg), % 0
93.1 to 95.8
Manganese (Mn), % 1.0 to 2.5
0
Molybdenum (Mo), % 4.2 to 5.2
0
Nickel (Ni), % 24 to 26
0 to 0.010
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0 to 0.9
0
Silver (Ag), % 0
2.0 to 3.0
Sulfur (S), % 0 to 0.020
0
Unspecified Rare Earths, % 0
1.8 to 2.5
Zirconium (Zr), % 0
0.4 to 1.0
Residuals, % 0
0 to 0.3