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AZ91A Magnesium vs. AWS E16-8-2

AZ91A magnesium belongs to the magnesium alloys classification, while AWS E16-8-2 belongs to the iron alloys. There are 24 material properties with values for both materials. Properties with values for just one material (10, 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 AZ91A magnesium and the bottom bar is AWS E16-8-2.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
200
Elongation at Break, % 5.0
40
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 18
77
Tensile Strength: Ultimate (UTS), MPa 240
620

Thermal Properties

Latent Heat of Fusion, J/g 360
280
Melting Completion (Liquidus), °C 600
1440
Melting Onset (Solidus), °C 470
1400
Specific Heat Capacity, J/kg-K 990
470
Thermal Conductivity, W/m-K 73
16
Thermal Expansion, µm/m-K 26
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 52
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 12
15
Density, g/cm3 1.7
7.9
Embodied Carbon, kg CO2/kg material 22
3.2
Embodied Energy, MJ/kg 160
45
Embodied Water, L/kg 990
140

Common Calculations

Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 69
25
Strength to Weight: Axial, points 38
22
Strength to Weight: Bending, points 49
20
Thermal Diffusivity, mm2/s 42
4.2
Thermal Shock Resistance, points 14
16

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0
Carbon (C), % 0
0 to 0.1
Chromium (Cr), % 0
14.5 to 16.5
Copper (Cu), % 0 to 0.1
0 to 0.75
Iron (Fe), % 0
68 to 76.5
Magnesium (Mg), % 88.2 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0.5 to 2.5
Molybdenum (Mo), % 0
1.0 to 2.0
Nickel (Ni), % 0 to 0.030
7.5 to 9.5
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.5
0 to 0.6
Sulfur (S), % 0
0 to 0.030
Zinc (Zn), % 0.35 to 1.0
0