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AWS E16-8-2 vs. AZ31C Magnesium

AWS E16-8-2 belongs to the iron alloys classification, while AZ31C magnesium belongs to the magnesium 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 AWS E16-8-2 and the bottom bar is AZ31C magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
45
Elongation at Break, % 40
12
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
17
Tensile Strength: Ultimate (UTS), MPa 620
260

Thermal Properties

Latent Heat of Fusion, J/g 280
350
Melting Completion (Liquidus), °C 1440
600
Melting Onset (Solidus), °C 1400
550
Specific Heat Capacity, J/kg-K 470
990
Thermal Conductivity, W/m-K 16
130
Thermal Expansion, µm/m-K 14
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
19
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
98

Otherwise Unclassified Properties

Base Metal Price, % relative 15
12
Density, g/cm3 7.9
1.7
Embodied Carbon, kg CO2/kg material 3.2
23
Embodied Energy, MJ/kg 45
160
Embodied Water, L/kg 140
970

Common Calculations

Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
70
Strength to Weight: Axial, points 22
42
Strength to Weight: Bending, points 20
53
Thermal Diffusivity, mm2/s 4.2
74
Thermal Shock Resistance, points 16
16

Alloy Composition

Aluminum (Al), % 0
2.4 to 3.6
Carbon (C), % 0 to 0.1
0
Chromium (Cr), % 14.5 to 16.5
0
Copper (Cu), % 0 to 0.75
0 to 0.1
Iron (Fe), % 68 to 76.5
0
Magnesium (Mg), % 0
93.4 to 97
Manganese (Mn), % 0.5 to 2.5
0.15 to 1.0
Molybdenum (Mo), % 1.0 to 2.0
0
Nickel (Ni), % 7.5 to 9.5
0 to 0.030
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0 to 0.6
0 to 0.1
Sulfur (S), % 0 to 0.030
0
Zinc (Zn), % 0
0.5 to 1.5
Residuals, % 0
0 to 0.3