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AZ91A Magnesium vs. AWS ERNiCrFe-5

AZ91A magnesium belongs to the magnesium alloys classification, while AWS ERNiCrFe-5 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 ERNiCrFe-5.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
190
Elongation at Break, % 5.0
34
Poisson's Ratio 0.29
0.3
Shear Modulus, GPa 18
74
Tensile Strength: Ultimate (UTS), MPa 240
630

Thermal Properties

Latent Heat of Fusion, J/g 360
310
Melting Completion (Liquidus), °C 600
1390
Melting Onset (Solidus), °C 470
1340
Specific Heat Capacity, J/kg-K 990
450
Thermal Conductivity, W/m-K 73
14
Thermal Expansion, µm/m-K 26
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
1.6
Electrical Conductivity: Equal Weight (Specific), % IACS 52
1.7

Otherwise Unclassified Properties

Base Metal Price, % relative 12
65
Density, g/cm3 1.7
8.5
Embodied Carbon, kg CO2/kg material 22
11
Embodied Energy, MJ/kg 160
150
Embodied Water, L/kg 990
250

Common Calculations

Stiffness to Weight: Axial, points 15
12
Stiffness to Weight: Bending, points 69
23
Strength to Weight: Axial, points 38
20
Strength to Weight: Bending, points 49
19
Thermal Diffusivity, mm2/s 42
3.6
Thermal Shock Resistance, points 14
19

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
0
Carbon (C), % 0
0 to 0.080
Chromium (Cr), % 0
14 to 17
Cobalt (Co), % 0
0 to 0.12
Copper (Cu), % 0 to 0.1
0 to 0.5
Iron (Fe), % 0
6.0 to 10
Magnesium (Mg), % 88.2 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0 to 1.0
Nickel (Ni), % 0 to 0.030
70 to 78.5
Niobium (Nb), % 0
1.5 to 3.0
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.5
0 to 0.35
Sulfur (S), % 0
0 to 0.015
Zinc (Zn), % 0.35 to 1.0
0
Residuals, % 0
0 to 0.5