Alnico® 4 (Isotropic, Cast) Hard Magnetic Alloy
Alnico® 4 (Isotropic, Cast) Hard Magnetic Alloy
Categories: Metal; Electronic/Magnetic Alloy; Ferrous Metal
Material Notes: 56Fe-12Al-27Ni-5Co
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Physical Properties
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Metric
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English
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Comments
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Density
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7.00 g/cc
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0.253 lb/in³
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Mechanical Properties
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Metric
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English
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Comments
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Hardness, Rockwell C
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45.0
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45.0
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Tensile Strength, Ultimate
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63.0 MPa
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9140 psi
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Modulus of Rupture
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0.167 GPa
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24.2 ksi
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Transverse
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Electrical Properties
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Metric
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English
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Comments
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Electrical Resistivity
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0.0000750 ohm-cm
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0.0000750 ohm-cm
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Magnetic Coercive Force, H
c
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729 Oe
|
729 Oe
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Magnetic Remanence, B
r
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5350 Gauss
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5350 Gauss
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Magnetic Maximum Energy Product, BH
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1.26 MGOe
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1.26 MGOe
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Curie Temperature
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800 °C
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1470 °F
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Thermal Properties
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Metric
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English
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Comments
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CTE, linear
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13.1 µm/m-°C
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7.28 µin/in-°F
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Maximum Service Temperature, Air
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590 °C
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1090 °F
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Component Elements Properties
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Metric
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English
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Comments
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Aluminum, Al
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12.0 %
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12.0 %
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Cobalt, Co
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5.00 %
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5.00 %
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Iron, Fe
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56.0 %
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56.0 %
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Nickel, Ni
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27.0 %
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27.0 %
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Descriptive Properties
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Demagnetization Induction, B
d (Tesla)
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0.3
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Intrinsic Magnetic Coercive Force, H
Ci (Oe)
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779
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