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AZ91A Magnesium vs. AWS ENiCrMo-3

AZ91A magnesium belongs to the magnesium alloys classification, while AWS ENiCrMo-3 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 AZ91A magnesium and the bottom bar is AWS ENiCrMo-3.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
200
Elongation at Break, % 5.0
34
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 18
79
Tensile Strength: Ultimate (UTS), MPa 240
870

Thermal Properties

Latent Heat of Fusion, J/g 360
330
Melting Completion (Liquidus), °C 600
1480
Melting Onset (Solidus), °C 470
1430
Specific Heat Capacity, J/kg-K 990
440
Thermal Conductivity, W/m-K 73
11
Thermal Expansion, µm/m-K 26
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
1.3
Electrical Conductivity: Equal Weight (Specific), % IACS 52
1.4

Otherwise Unclassified Properties

Base Metal Price, % relative 12
80
Density, g/cm3 1.7
8.6
Embodied Carbon, kg CO2/kg material 22
14
Embodied Energy, MJ/kg 160
190
Embodied Water, L/kg 990
290

Common Calculations

Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 69
23
Strength to Weight: Axial, points 38
28
Strength to Weight: Bending, points 49
24
Thermal Diffusivity, mm2/s 42
2.8
Thermal Shock Resistance, points 14
25

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
0
Carbon (C), % 0
0 to 0.1
Chromium (Cr), % 0
20 to 23
Cobalt (Co), % 0
0 to 0.12
Copper (Cu), % 0 to 0.1
0 to 0.5
Iron (Fe), % 0
0 to 7.0
Magnesium (Mg), % 88.2 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0 to 1.0
Molybdenum (Mo), % 0
8.0 to 10
Nickel (Ni), % 0 to 0.030
55 to 68.9
Niobium (Nb), % 0
3.2 to 4.2
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.5
0 to 0.75
Sulfur (S), % 0
0 to 0.020
Zinc (Zn), % 0.35 to 1.0
0
Residuals, % 0
0 to 0.5