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AWS E33-31 vs. WE54A Magnesium

AWS E33-31 belongs to the iron alloys classification, while WE54A magnesium belongs to the magnesium alloys. There are 20 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 E33-31 and the bottom bar is WE54A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
44
Elongation at Break, % 29
4.3 to 5.6
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 81
17
Tensile Strength: Ultimate (UTS), MPa 810
270 to 300

Thermal Properties

Latent Heat of Fusion, J/g 320
330
Melting Completion (Liquidus), °C 1380
640
Melting Onset (Solidus), °C 1330
570
Specific Heat Capacity, J/kg-K 480
960
Thermal Expansion, µm/m-K 14
25

Otherwise Unclassified Properties

Base Metal Price, % relative 36
34
Density, g/cm3 7.9
1.9
Embodied Carbon, kg CO2/kg material 6.0
29
Embodied Energy, MJ/kg 86
260
Embodied Water, L/kg 260
900

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
62
Strength to Weight: Axial, points 28
39 to 43
Strength to Weight: Bending, points 24
49 to 51
Thermal Shock Resistance, points 19
18 to 19

Alloy Composition

Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 31 to 35
0
Copper (Cu), % 0.4 to 0.8
0 to 0.030
Iron (Fe), % 24.7 to 34.8
0 to 0.010
Lithium (Li), % 0
0 to 0.2
Magnesium (Mg), % 0
88.7 to 93.4
Manganese (Mn), % 2.5 to 4.0
0 to 0.030
Molybdenum (Mo), % 1.0 to 2.0
0
Nickel (Ni), % 30 to 32
0 to 0.0050
Nitrogen (N), % 0.3 to 0.5
0
Phosphorus (P), % 0 to 0.020
0
Silicon (Si), % 0 to 0.9
0 to 0.010
Sulfur (S), % 0 to 0.010
0
Unspecified Rare Earths, % 0
1.5 to 4.0
Yttrium (Y), % 0
4.8 to 5.5
Zinc (Zn), % 0
0 to 0.2
Zirconium (Zr), % 0
0.4 to 1.0
Residuals, % 0
0 to 0.3