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AWS E3155 vs. AZ31C Magnesium

AWS E3155 belongs to the iron alloys classification, while AZ31C magnesium belongs to the magnesium alloys. There are 22 material properties with values for both materials. Properties with values for just one material (9, 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 E3155 and the bottom bar is AZ31C magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
45
Elongation at Break, % 23
12
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 81
17
Tensile Strength: Ultimate (UTS), MPa 770
260

Thermal Properties

Latent Heat of Fusion, J/g 310
350
Melting Completion (Liquidus), °C 1460
600
Melting Onset (Solidus), °C 1410
550
Specific Heat Capacity, J/kg-K 450
990
Thermal Conductivity, W/m-K 13
130
Thermal Expansion, µm/m-K 13
26

Otherwise Unclassified Properties

Base Metal Price, % relative 70
12
Density, g/cm3 8.4
1.7
Embodied Carbon, kg CO2/kg material 7.7
23
Embodied Energy, MJ/kg 110
160
Embodied Water, L/kg 300
970

Common Calculations

Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 24
70
Strength to Weight: Axial, points 26
42
Strength to Weight: Bending, points 22
53
Thermal Diffusivity, mm2/s 3.3
74
Thermal Shock Resistance, points 20
16

Alloy Composition

Aluminum (Al), % 0
2.4 to 3.6
Carbon (C), % 0 to 0.1
0
Chromium (Cr), % 20 to 22.5
0
Cobalt (Co), % 18.5 to 21
0
Copper (Cu), % 0 to 0.75
0 to 0.1
Iron (Fe), % 23.3 to 36.3
0
Magnesium (Mg), % 0
93.4 to 97
Manganese (Mn), % 1.0 to 2.5
0.15 to 1.0
Molybdenum (Mo), % 2.5 to 3.5
0
Nickel (Ni), % 19 to 21
0 to 0.030
Niobium (Nb), % 0.75 to 1.3
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0 to 0.1
Sulfur (S), % 0 to 0.030
0
Tungsten (W), % 2.0 to 3.0
0
Zinc (Zn), % 0
0.5 to 1.5
Residuals, % 0
0 to 0.3