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AS41B Magnesium vs. AWS E309Nb

AS41B magnesium belongs to the magnesium alloys classification, while AWS E309Nb belongs to the iron alloys. There are 24 material properties with values for both materials. Properties with values for just one material (7, 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 AS41B magnesium and the bottom bar is AWS E309Nb.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
200
Elongation at Break, % 6.0
34
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 18
78
Tensile Strength: Ultimate (UTS), MPa 210
620

Thermal Properties

Latent Heat of Fusion, J/g 370
300
Melting Completion (Liquidus), °C 620
1420
Melting Onset (Solidus), °C 570
1380
Specific Heat Capacity, J/kg-K 1000
480
Thermal Conductivity, W/m-K 68
15
Thermal Expansion, µm/m-K 26
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 17
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 92
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 12
25
Density, g/cm3 1.7
7.8
Embodied Carbon, kg CO2/kg material 23
4.4
Embodied Energy, MJ/kg 160
64
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 35
22
Strength to Weight: Bending, points 47
21
Thermal Diffusivity, mm2/s 41
4.0
Thermal Shock Resistance, points 13
16

Alloy Composition

Aluminum (Al), % 3.5 to 5.0
0
Carbon (C), % 0
0 to 0.12
Chromium (Cr), % 0
22 to 25
Copper (Cu), % 0 to 0.020
0 to 0.75
Iron (Fe), % 0 to 0.0035
54.8 to 64.8
Magnesium (Mg), % 92.7 to 95.7
0
Manganese (Mn), % 0.35 to 0.7
0.5 to 2.5
Molybdenum (Mo), % 0
0 to 0.75
Nickel (Ni), % 0 to 0.0020
12 to 14
Niobium (Nb), % 0
0.7 to 1.0
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 0.12
0