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EN-MC21320 Magnesium vs. AWS E309L

EN-MC21320 magnesium belongs to the magnesium alloys classification, while AWS E309L belongs to the iron alloys. There are 24 material properties with values for both materials. Properties with values for just one material (8, 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-MC21320 magnesium and the bottom bar is AWS E309L.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
200
Elongation at Break, % 7.5
34
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 18
79
Tensile Strength: Ultimate (UTS), MPa 230
580

Thermal Properties

Latent Heat of Fusion, J/g 370
300
Melting Completion (Liquidus), °C 600
1420
Melting Onset (Solidus), °C 530
1370
Specific Heat Capacity, J/kg-K 1000
480
Thermal Conductivity, W/m-K 66
15
Thermal Expansion, µm/m-K 26
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 17
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 91
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 12
20
Density, g/cm3 1.6
7.8
Embodied Carbon, kg CO2/kg material 23
3.7
Embodied Energy, MJ/kg 160
52
Embodied Water, L/kg 980
180

Common Calculations

Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 72
25
Strength to Weight: Axial, points 38
21
Strength to Weight: Bending, points 50
20
Thermal Diffusivity, mm2/s 40
4.0
Thermal Shock Resistance, points 13
15

Alloy Composition


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Aluminum (Al), % 3.5 to 5.0
0
Carbon (C), % 0
0 to 0.040
Chromium (Cr), % 0
22 to 25
Copper (Cu), % 0 to 0.010
0 to 0.75
Iron (Fe), % 0 to 0.0050
55.9 to 65.5
Magnesium (Mg), % 92.5 to 95.9
0
Manganese (Mn), % 0.1 to 0.7
0.5 to 2.5
Molybdenum (Mo), % 0
0 to 0.75
Nickel (Ni), % 0 to 0.0020
12 to 14
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0.5 to 1.5
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.010
0