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AZ91B Magnesium vs. AWS ENiCrMo-4

AZ91B magnesium belongs to the magnesium alloys classification, while AWS ENiCrMo-4 belongs to the nickel alloys. There are 20 material properties with values for both materials. Properties with values for just one material (13, 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 ENiCrMo-4.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
220
Elongation at Break, % 5.0
28
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 18
84
Tensile Strength: Ultimate (UTS), MPa 240
790

Thermal Properties

Latent Heat of Fusion, J/g 360
320
Melting Completion (Liquidus), °C 600
1590
Melting Onset (Solidus), °C 470
1530
Specific Heat Capacity, J/kg-K 990
410
Thermal Expansion, µm/m-K 26
12

Otherwise Unclassified Properties

Base Metal Price, % relative 12
70
Density, g/cm3 1.7
9.0
Embodied Carbon, kg CO2/kg material 22
13
Embodied Energy, MJ/kg 160
170
Embodied Water, L/kg 990
280

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
22

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
0
Carbon (C), % 0
0 to 0.020
Chromium (Cr), % 0
14.5 to 16.5
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
15 to 17
Nickel (Ni), % 0 to 0.030
49.9 to 63.5
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 0.2
Sulfur (S), % 0
0 to 0.030
Tungsten (W), % 0
3.0 to 4.5
Vanadium (V), % 0
0 to 0.35
Zinc (Zn), % 0.35 to 1.0
0
Residuals, % 0
0 to 0.5