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AZ91A Magnesium vs. AWS ERNiCrCoMo-1

AZ91A magnesium belongs to the magnesium alloys classification, while AWS ERNiCrCoMo-1 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 ERNiCrCoMo-1.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
210
Elongation at Break, % 5.0
28
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 18
81
Tensile Strength: Ultimate (UTS), MPa 240
710

Thermal Properties

Latent Heat of Fusion, J/g 360
330
Melting Completion (Liquidus), °C 600
1420
Melting Onset (Solidus), °C 470
1370
Specific Heat Capacity, J/kg-K 990
450
Thermal Conductivity, W/m-K 73
13
Thermal Expansion, µm/m-K 26
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
1.4
Electrical Conductivity: Equal Weight (Specific), % IACS 52
1.5

Otherwise Unclassified Properties

Base Metal Price, % relative 12
75
Density, g/cm3 1.7
8.5
Embodied Carbon, kg CO2/kg material 22
10
Embodied Energy, MJ/kg 160
140
Embodied Water, L/kg 990
350

Common Calculations

Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 69
23
Strength to Weight: Axial, points 38
23
Strength to Weight: Bending, points 49
21
Thermal Diffusivity, mm2/s 42
3.5
Thermal Shock Resistance, points 14
19

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
0.8 to 1.5
Carbon (C), % 0
0.050 to 0.15
Chromium (Cr), % 0
20 to 24
Cobalt (Co), % 0
10 to 15
Copper (Cu), % 0 to 0.1
0 to 0.5
Iron (Fe), % 0
0 to 3.0
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
42.7 to 61.2
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0
0 to 0.6
Zinc (Zn), % 0.35 to 1.0
0
Residuals, % 0
0 to 0.5