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AZ91B Magnesium vs. Type 2 Magnetic Alloy

AZ91B magnesium belongs to the magnesium alloys classification, while Type 2 magnetic alloy belongs to the iron alloys. There are 25 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 Type 2 magnetic alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
190
Elongation at Break, % 5.0
2.0 to 38
Poisson's Ratio 0.29
0.3
Shear Modulus, GPa 18
72
Tensile Strength: Ultimate (UTS), MPa 240
510 to 910
Tensile Strength: Yield (Proof), MPa 160
260 to 870

Thermal Properties

Latent Heat of Fusion, J/g 360
270
Melting Completion (Liquidus), °C 600
1420
Melting Onset (Solidus), °C 470
1370
Specific Heat Capacity, J/kg-K 990
460
Thermal Expansion, µm/m-K 26
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
3.9
Electrical Conductivity: Equal Weight (Specific), % IACS 58
4.2

Otherwise Unclassified Properties

Base Metal Price, % relative 12
33
Density, g/cm3 1.7
8.4
Embodied Carbon, kg CO2/kg material 22
5.9
Embodied Energy, MJ/kg 160
81
Embodied Water, L/kg 990
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
18 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 280
170 to 2010
Stiffness to Weight: Axial, points 15
12
Stiffness to Weight: Bending, points 69
23
Strength to Weight: Axial, points 38
17 to 30
Strength to Weight: Bending, points 49
17 to 25
Thermal Shock Resistance, points 14
16 to 29

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0
Carbon (C), % 0
0 to 0.050
Chromium (Cr), % 0
0 to 0.3
Cobalt (Co), % 0
0 to 0.5
Copper (Cu), % 0 to 0.35
0 to 0.3
Iron (Fe), % 0
48.2 to 53
Magnesium (Mg), % 87.9 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0 to 0.8
Molybdenum (Mo), % 0
0 to 0.3
Nickel (Ni), % 0 to 0.030
47 to 49
Phosphorus (P), % 0
0 to 0.010
Silicon (Si), % 0 to 0.5
0 to 0.5
Sulfur (S), % 0
0 to 0.030
Zinc (Zn), % 0.35 to 1.0
0