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AWS E219 vs. EQ21A Magnesium

AWS E219 belongs to the iron alloys classification, while EQ21A magnesium belongs to the magnesium alloys. There are 21 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 E219 and the bottom bar is EQ21A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
44
Elongation at Break, % 17
2.4
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
17
Tensile Strength: Ultimate (UTS), MPa 690
250

Thermal Properties

Latent Heat of Fusion, J/g 290
340
Melting Completion (Liquidus), °C 1400
640
Melting Onset (Solidus), °C 1360
560
Specific Heat Capacity, J/kg-K 480
980
Thermal Conductivity, W/m-K 14
110
Thermal Expansion, µm/m-K 15
27

Otherwise Unclassified Properties

Base Metal Price, % relative 15
80
Density, g/cm3 7.7
1.9
Embodied Carbon, kg CO2/kg material 3.1
27
Embodied Energy, MJ/kg 44
210

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
63
Strength to Weight: Axial, points 25
37
Strength to Weight: Bending, points 23
47
Thermal Diffusivity, mm2/s 3.8
62
Thermal Shock Resistance, points 17
15

Alloy Composition

Carbon (C), % 0 to 0.060
0
Chromium (Cr), % 19 to 21.5
0
Copper (Cu), % 0 to 0.75
0.050 to 0.1
Iron (Fe), % 58.6 to 67.4
0
Magnesium (Mg), % 0
93.9 to 96.8
Manganese (Mn), % 8.0 to 10
0
Molybdenum (Mo), % 0 to 0.75
0
Nickel (Ni), % 5.5 to 7.0
0 to 0.010
Nitrogen (N), % 0.1 to 0.3
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0
Silver (Ag), % 0
1.3 to 1.7
Sulfur (S), % 0 to 0.030
0
Unspecified Rare Earths, % 0
1.5 to 3.0
Zirconium (Zr), % 0
0.4 to 1.0
Residuals, % 0
0 to 0.3