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AZ91B Magnesium vs. Type 3 Magnetic Alloy

AZ91B magnesium belongs to the magnesium alloys classification, while Type 3 magnetic alloy belongs to the nickel alloys. There are 28 material properties with values for both materials. Properties with values for just one material (6, 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 3 magnetic alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
180
Elongation at Break, % 5.0
43
Fatigue Strength, MPa 79
170
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 18
70
Shear Strength, MPa 140
380
Tensile Strength: Ultimate (UTS), MPa 240
550
Tensile Strength: Yield (Proof), MPa 160
210

Thermal Properties

Latent Heat of Fusion, J/g 360
290
Maximum Temperature: Mechanical, °C 130
910
Melting Completion (Liquidus), °C 600
1370
Melting Onset (Solidus), °C 470
1320
Specific Heat Capacity, J/kg-K 990
450
Thermal Expansion, µm/m-K 26
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 58
3.0

Otherwise Unclassified Properties

Base Metal Price, % relative 12
55
Density, g/cm3 1.7
8.7
Embodied Carbon, kg CO2/kg material 22
8.7
Embodied Energy, MJ/kg 160
120
Embodied Water, L/kg 990
220

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
190
Resilience: Unit (Modulus of Resilience), kJ/m3 280
120
Stiffness to Weight: Axial, points 15
12
Stiffness to Weight: Bending, points 69
22
Strength to Weight: Axial, points 38
18
Strength to Weight: Bending, points 49
17
Thermal Shock Resistance, points 14
18

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0
Carbon (C), % 0
0 to 0.050
Chromium (Cr), % 0
2.0 to 3.0
Cobalt (Co), % 0
0 to 0.5
Copper (Cu), % 0 to 0.35
4.0 to 6.0
Iron (Fe), % 0
9.9 to 19
Magnesium (Mg), % 87.9 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0 to 1.5
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0 to 0.030
75 to 78
Phosphorus (P), % 0
0 to 0.010
Silicon (Si), % 0 to 0.5
0 to 0.5
Sulfur (S), % 0
0 to 0.020
Zinc (Zn), % 0.35 to 1.0
0