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
Physical Properties Metric English Comments Density 7.00 g/cc 0.253 lb/in³ Mechanical Properties Metric English Comments Hardness, Rockwell C 45.0 45.0 Tensile Strength, Ultimate 63.0 MPa 9140 psi Modulus of Rupture 0.167 GPa 24.2 ksi Transverse Electrical Properties Metric English Comments Electrical Resistivity 0.0000750 ohm-cm 0.0000750 ohm-cm Magnetic Coercive Force, Hc 729 Oe 729 Oe Magnetic Remanence, Br 5350 Gauss 5350 Gauss Magnetic Maximum Energy Product, BH 1.26 MGOe 1.26 MGOe Curie Temperature 800 °C 1470 °F Thermal Properties Metric English Comments CTE, linear 13.1 µm/m-°C 7.28 µin/in-°F Maximum Service Temperature, Air 590 °C 1090 °F Component Elements Properties Metric English Comments Aluminum, Al 12.0 % 12.0 % Cobalt, Co 5.00 % 5.00 % Iron, Fe 56.0 % 56.0 % Nickel, Ni 27.0 % 27.0 % Descriptive Properties Demagnetization Induction, Bd (Tesla) 0.3 Intrinsic Magnetic Coercive Force, HCi (Oe) 779
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