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AWS E33-31 vs. EZ33A Magnesium

AWS E33-31 belongs to the iron alloys classification, while EZ33A magnesium belongs to the magnesium alloys. There are 20 material properties with values for both materials. Properties with values for just one material (14, 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 EZ33A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
44
Elongation at Break, % 29
2.6
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 81
17
Tensile Strength: Ultimate (UTS), MPa 810
150

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
970
Thermal Expansion, µm/m-K 14
27

Otherwise Unclassified Properties

Base Metal Price, % relative 36
25
Density, g/cm3 7.9
1.9
Embodied Carbon, kg CO2/kg material 6.0
25
Embodied Energy, MJ/kg 86
190
Embodied Water, L/kg 260
930

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
61
Strength to Weight: Axial, points 28
22
Strength to Weight: Bending, points 24
33
Thermal Shock Resistance, points 19
9.2

Alloy Composition

Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 31 to 35
0
Copper (Cu), % 0.4 to 0.8
0 to 0.1
Iron (Fe), % 24.7 to 34.8
0
Magnesium (Mg), % 0
91.5 to 95
Manganese (Mn), % 2.5 to 4.0
0
Molybdenum (Mo), % 1.0 to 2.0
0
Nickel (Ni), % 30 to 32
0 to 0.010
Nitrogen (N), % 0.3 to 0.5
0
Phosphorus (P), % 0 to 0.020
0
Silicon (Si), % 0 to 0.9
0
Sulfur (S), % 0 to 0.010
0
Unspecified Rare Earths, % 0
2.5 to 4.0
Zinc (Zn), % 0
2.0 to 3.1
Zirconium (Zr), % 0
0.5 to 1.0
Residuals, % 0
0 to 0.3