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Elmet Technologies

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 PropertiesMetricEnglishComments
Density 7.00 g/cc0.253 lb/in³
 
Mechanical PropertiesMetricEnglishComments
Hardness, Rockwell C 4545
Tensile Strength, Ultimate 63.0 MPa9140 psi
Modulus of Rupture 0.167 GPa24.2 ksiTransverse
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity 0.0000750 ohm-cm0.0000750 ohm-cm
Magnetic Coercive Force, Hc 729 Oe729 Oe
Magnetic Remanence, Br 5350 Gauss5350 Gauss
Magnetic Maximum Energy Product, BH 1.26 MGOe1.26 MGOe
Curie Temperature 800 °C1470 °F
 
Thermal PropertiesMetricEnglishComments
CTE, linear 13.1 µm/m-°C7.28 µin/in-°F
Maximum Service Temperature, Air 590 °C1090 °F
 
Component Elements PropertiesMetricEnglishComments
Aluminum, Al 12 %12 %
Cobalt, Co 5.0 %5.0 %
Iron, Fe 56 %56 %
Nickel, Ni 27 %27 %
 
Descriptive Properties
Demagnetization Induction, Bd (Tesla)0.3
Intrinsic Magnetic Coercive Force, HCi (Oe)779

References for this datasheet.

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MM901 / 100408

Ensinger PEI

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