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AZ91B Magnesium vs. AWS ERNiMo-3

AZ91B magnesium belongs to the magnesium alloys classification, while AWS ERNiMo-3 belongs to the nickel alloys. There are 19 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 AZ91B magnesium and the bottom bar is AWS ERNiMo-3.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
220
Poisson's Ratio 0.29
0.3
Shear Modulus, GPa 18
83
Tensile Strength: Ultimate (UTS), MPa 240
770

Thermal Properties

Latent Heat of Fusion, J/g 360
320
Melting Completion (Liquidus), °C 600
1600
Melting Onset (Solidus), °C 470
1540
Specific Heat Capacity, J/kg-K 990
400
Thermal Expansion, µm/m-K 26
11

Otherwise Unclassified Properties

Base Metal Price, % relative 12
70
Density, g/cm3 1.7
9.1
Embodied Carbon, kg CO2/kg material 22
15
Embodied Energy, MJ/kg 160
190
Embodied Water, L/kg 990
270

Common Calculations

Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 69
22
Strength to Weight: Axial, points 38
24
Strength to Weight: Bending, points 49
21
Thermal Shock Resistance, points 14
24

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
0
Carbon (C), % 0
0 to 0.12
Chromium (Cr), % 0
4.0 to 6.0
Cobalt (Co), % 0
0 to 2.5
Copper (Cu), % 0 to 0.35
0 to 0.5
Iron (Fe), % 0
4.0 to 7.0
Magnesium (Mg), % 87.9 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0 to 1.0
Molybdenum (Mo), % 0
23 to 26
Nickel (Ni), % 0 to 0.030
53.7 to 69
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Tungsten (W), % 0
0 to 1.0
Vanadium (V), % 0
0 to 0.6
Zinc (Zn), % 0.35 to 1.0
0
Residuals, % 0
0 to 0.5