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AWS E316LMn vs. AZ91A Magnesium

AWS E316LMn belongs to the iron alloys classification, while AZ91A 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 E316LMn and the bottom bar is AZ91A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
46
Elongation at Break, % 23
5.0
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 79
18
Tensile Strength: Ultimate (UTS), MPa 620
240

Thermal Properties

Latent Heat of Fusion, J/g 300
360
Melting Completion (Liquidus), °C 1420
600
Melting Onset (Solidus), °C 1370
470
Specific Heat Capacity, J/kg-K 470
990
Thermal Expansion, µm/m-K 14
26

Otherwise Unclassified Properties

Base Metal Price, % relative 24
12
Density, g/cm3 7.9
1.7
Embodied Carbon, kg CO2/kg material 4.6
22
Embodied Energy, MJ/kg 64
160
Embodied Water, L/kg 180
990

Common Calculations

Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
69
Strength to Weight: Axial, points 22
38
Strength to Weight: Bending, points 20
49
Thermal Shock Resistance, points 15
14

Alloy Composition

Aluminum (Al), % 0
8.3 to 9.7
Carbon (C), % 0 to 0.040
0
Chromium (Cr), % 18 to 21
0
Copper (Cu), % 0 to 0.75
0 to 0.1
Iron (Fe), % 47.5 to 59.4
0
Magnesium (Mg), % 0
88.2 to 91.2
Manganese (Mn), % 5.0 to 8.0
0.13 to 0.5
Molybdenum (Mo), % 2.5 to 3.5
0
Nickel (Ni), % 15 to 18
0 to 0.030
Nitrogen (N), % 0.1 to 0.25
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 0.9
0 to 0.5
Sulfur (S), % 0 to 0.030
0
Zinc (Zn), % 0
0.35 to 1.0