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ASTM F15 Fe-Ni-Co vs. AZ91A Magnesium

ASTM F15 Fe-Ni-Co belongs to the iron alloys classification, while AZ91A magnesium belongs to the magnesium alloys. There are 23 material properties with values for both materials. Properties with values for just one material (11, 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 ASTM F15 Fe-Ni-Co and the bottom bar is AZ91A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
46
Poisson's Ratio 0.3
0.29
Shear Modulus, GPa 73
18
Tensile Strength: Ultimate (UTS), MPa 520 to 880
240

Thermal Properties

Latent Heat of Fusion, J/g 270
360
Melting Completion (Liquidus), °C 1410
600
Melting Onset (Solidus), °C 1450
470
Specific Heat Capacity, J/kg-K 460
990
Thermal Conductivity, W/m-K 17
73
Thermal Expansion, µm/m-K 6.0
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.7
10
Electrical Conductivity: Equal Weight (Specific), % IACS 4.0
52

Otherwise Unclassified Properties

Base Metal Price, % relative 49
12
Density, g/cm3 8.3
1.7
Embodied Carbon, kg CO2/kg material 5.2
22
Embodied Energy, MJ/kg 71
160
Embodied Water, L/kg 190
990

Common Calculations

Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 23
69
Strength to Weight: Axial, points 17 to 29
38
Strength to Weight: Bending, points 17 to 24
49
Thermal Diffusivity, mm2/s 4.5
42
Thermal Shock Resistance, points 32 to 55
14

Alloy Composition

Aluminum (Al), % 0 to 0.1
8.3 to 9.7
Carbon (C), % 0 to 0.040
0
Chromium (Cr), % 0 to 0.2
0
Cobalt (Co), % 16 to 18
0
Copper (Cu), % 0 to 0.2
0 to 0.1
Iron (Fe), % 50.3 to 56
0
Magnesium (Mg), % 0 to 0.1
88.2 to 91.2
Manganese (Mn), % 0 to 0.5
0.13 to 0.5
Molybdenum (Mo), % 0 to 0.2
0
Nickel (Ni), % 28 to 30
0 to 0.030
Silicon (Si), % 0 to 0.2
0 to 0.5
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 0
0.35 to 1.0
Zirconium (Zr), % 0 to 0.1
0