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AZ91B Magnesium vs. AWS ENi-1

AZ91B magnesium belongs to the magnesium alloys classification, while AWS ENi-1 belongs to the nickel alloys. There are 24 material properties with values for both materials. Properties with values for just one material (9, 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 AZ91B magnesium and the bottom bar is AWS ENi-1.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
180
Elongation at Break, % 5.0
22
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 18
69
Tensile Strength: Ultimate (UTS), MPa 240
470

Thermal Properties

Latent Heat of Fusion, J/g 360
310
Melting Completion (Liquidus), °C 600
1360
Melting Onset (Solidus), °C 470
1310
Specific Heat Capacity, J/kg-K 990
450
Thermal Conductivity, W/m-K 73
73
Thermal Expansion, µm/m-K 26
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
19
Electrical Conductivity: Equal Weight (Specific), % IACS 58
19

Otherwise Unclassified Properties

Base Metal Price, % relative 12
60
Density, g/cm3 1.7
8.7
Embodied Carbon, kg CO2/kg material 22
11
Embodied Energy, MJ/kg 160
150
Embodied Water, L/kg 990
230

Common Calculations

Stiffness to Weight: Axial, points 15
12
Stiffness to Weight: Bending, points 69
22
Strength to Weight: Axial, points 38
15
Strength to Weight: Bending, points 49
15
Thermal Diffusivity, mm2/s 42
19
Thermal Shock Resistance, points 14
17

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
0 to 1.0
Carbon (C), % 0
0 to 0.1
Copper (Cu), % 0 to 0.35
0 to 0.25
Iron (Fe), % 0
0 to 0.75
Magnesium (Mg), % 87.9 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0 to 0.75
Nickel (Ni), % 0 to 0.030
92 to 99
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.5
0 to 1.3
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 0
1.0 to 4.0
Zinc (Zn), % 0.35 to 1.0
0
Residuals, % 0
0 to 0.5