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AZ91A Magnesium vs. AWS E383

AZ91A magnesium belongs to the magnesium alloys classification, while AWS E383 belongs to the iron alloys. There are 22 material properties with values for both materials. Properties with values for just one material (12, 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 E383.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
210
Elongation at Break, % 5.0
34
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 18
80
Tensile Strength: Ultimate (UTS), MPa 240
580

Thermal Properties

Latent Heat of Fusion, J/g 360
320
Melting Completion (Liquidus), °C 600
1420
Melting Onset (Solidus), °C 470
1370
Specific Heat Capacity, J/kg-K 990
470
Thermal Conductivity, W/m-K 73
12
Thermal Expansion, µm/m-K 26
14

Otherwise Unclassified Properties

Base Metal Price, % relative 12
37
Density, g/cm3 1.7
8.1
Embodied Carbon, kg CO2/kg material 22
6.4
Embodied Energy, MJ/kg 160
89
Embodied Water, L/kg 990
240

Common Calculations

Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 69
24
Strength to Weight: Axial, points 38
20
Strength to Weight: Bending, points 49
19
Thermal Diffusivity, mm2/s 42
3.1
Thermal Shock Resistance, points 14
15

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
26.5 to 29
Copper (Cu), % 0 to 0.1
0.6 to 1.5
Iron (Fe), % 0
28.8 to 39.2
Magnesium (Mg), % 88.2 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0.5 to 2.5
Molybdenum (Mo), % 0
3.2 to 4.2
Nickel (Ni), % 0 to 0.030
30 to 33
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0 to 0.5
0 to 0.9
Sulfur (S), % 0
0 to 0.020
Zinc (Zn), % 0.35 to 1.0
0