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AWS E309LMo vs. ZK51A Magnesium

AWS E309LMo belongs to the iron alloys classification, while ZK51A magnesium belongs to the magnesium alloys. There are 24 material properties with values for both materials. Properties with values for just one material (8, 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 E309LMo and the bottom bar is ZK51A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
45
Elongation at Break, % 34
4.7
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 79
18
Tensile Strength: Ultimate (UTS), MPa 580
240

Thermal Properties

Latent Heat of Fusion, J/g 300
340
Melting Completion (Liquidus), °C 1430
640
Melting Onset (Solidus), °C 1390
550
Specific Heat Capacity, J/kg-K 480
970
Thermal Conductivity, W/m-K 15
110
Thermal Expansion, µm/m-K 14
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
28
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
140

Otherwise Unclassified Properties

Base Metal Price, % relative 22
13
Density, g/cm3 7.9
1.8
Embodied Carbon, kg CO2/kg material 4.2
24
Embodied Energy, MJ/kg 59
160
Embodied Water, L/kg 180
940

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
64
Strength to Weight: Axial, points 21
36
Strength to Weight: Bending, points 20
47
Thermal Diffusivity, mm2/s 3.9
61
Thermal Shock Resistance, points 15
15

Alloy Composition

Carbon (C), % 0 to 0.040
0
Chromium (Cr), % 22 to 25
0
Copper (Cu), % 0 to 0.75
0 to 0.1
Iron (Fe), % 53.6 to 63.5
0
Magnesium (Mg), % 0
93.1 to 95.9
Manganese (Mn), % 0.5 to 2.5
0
Molybdenum (Mo), % 2.0 to 3.0
0
Nickel (Ni), % 12 to 14
0 to 0.010
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.030
0
Zinc (Zn), % 0
3.6 to 5.5
Zirconium (Zr), % 0
0.5 to 1.0
Residuals, % 0
0 to 0.3