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AZ91B Magnesium vs. AWS ERNiCrMo-10

AZ91B magnesium belongs to the magnesium alloys classification, while AWS ERNiCrMo-10 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 ERNiCrMo-10.

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
1550
Melting Onset (Solidus), °C 470
1490
Specific Heat Capacity, J/kg-K 990
420
Thermal Conductivity, W/m-K 73
10
Thermal Expansion, µm/m-K 26
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
1.5
Electrical Conductivity: Equal Weight (Specific), % IACS 58
1.5

Otherwise Unclassified Properties

Base Metal Price, % relative 12
70
Density, g/cm3 1.7
8.9
Embodied Carbon, kg CO2/kg material 22
12
Embodied Energy, MJ/kg 160
160
Embodied Water, L/kg 990
300

Common Calculations

Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 69
23
Strength to Weight: Axial, points 38
25
Strength to Weight: Bending, points 49
21
Thermal Diffusivity, mm2/s 42
2.7
Thermal Shock Resistance, points 14
21

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
0
Carbon (C), % 0
0 to 0.015
Chromium (Cr), % 0
20 to 22.5
Cobalt (Co), % 0
0 to 2.5
Copper (Cu), % 0 to 0.35
0 to 0.5
Iron (Fe), % 0
2.0 to 6.0
Magnesium (Mg), % 87.9 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0 to 0.5
Molybdenum (Mo), % 0
12.5 to 14.5
Nickel (Ni), % 0 to 0.030
49 to 63
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0 to 0.5
0 to 0.080
Sulfur (S), % 0
0 to 0.010
Tungsten (W), % 0
2.5 to 3.5
Vanadium (V), % 0
0 to 0.35
Zinc (Zn), % 0.35 to 1.0
0
Residuals, % 0
0 to 0.5