Alnico (Aluminum Nickel Cobalt)

Alnico magnet material is made by alloying aluminum, nickel and cobalt with iron. Some grades also contain copper and/or titanium. The alloying process is casting or sintering. A high working temperature limit (550 °C / 1020 °F) makes Alnico especially well suited for sensitive automotive and aircraft sensor applications. Other popular Alnico applications include: instruments, security sensors, magnetos, electronic distributors, separators, electron tubes, traveling wave tubes, radar, holding magnets, coin acceptors, generators and motors, clutches and brakes, relays, controls, receivers, telephones, microphones, bell ringers, guitar pickups, loudspeakers, security systems and cow magnets.


Alnico Magnetic
Holder
Alnico 8, ±.0002"
on Thickness
Odd Shape
Alnico Magnet
Alnico Magnetic
Holder w/ 6 Poles

Alnico Disc Oriented
Cross Diamete
Sandblased Alnico
Breadloaf Magnet		  

 

Alnico is produced in many grades to fit the requirements of these applications, from Alnico 1 to Alnico 12, but the most popular grades are 2, 5 and 8. By comparison to newer materials, like ceramic, NdFeB and SmCo the coercivity of Alnico is low, so they have replaced Alnico where cost and/or greater resistance to demagnetization are valued more than high temperature limit and temperature stability.

 
Spec of Alnico
MAGNETIC CHARACTERISTICS AND PHYSICAL PROPERTIES OF CAST ALNICO
Type of Magnet Remanence Intrinsic Coercivity Coercivity Maximum Energy Product Maximum Working Temperature Reference Chinese Grade
Reference Br mT Hci KA/m Hc KA/m (BH)max KJ/m3 Tw
Designation (KG) (KOe) (KOe) (MGOe) C°
Anisotropic Cast Alnico
Alnico5 1200.0 ≥49 ≥48 ≥36.9 500 LNG40
(12.0) (≥0.61) (≥0.6) (≥4.63)
Alnico5 DG 1250.0 ≥53 ≥52 ≥44 500 LGN44
(12.5) (≥0.66) (≥0.65) (≥5.5)
Alnico5-7 1300.0 ≥57 ≥56 ≥520 500 LNG52
(13.0) (≥0.71) (≥0.70) (≥6.5)
Alnico8 820.0 ≥110 ≥110 ≥380 500 LNGT38
(8.2) (≥1.38) (≥1.38) (≥4.8)
Alnico8HC 700.0 ≥140 ≥140 ≥360 500 LNGT36J
(7.0) (≥1.76) (≥1.76) (≥4.5)
Alnico9 900.0 ≥110 ≥110 ≥600 500 LNGT60
(9.0) (≥1.38) (≥1.38) (≥7.53)
Remarks:
  • The above-mentioned data of magnetic parameters and physical properties are given at room temperature.
  • >The maximum service temperature of magnet is changeable due to the ratio length and diameter and enviromental factors.
  • If the material you are looking for is not listed, plaese contact technical sales to discuss about your needs. 
Type of Magnet Remanence Intrinsic
Coercivity		 Coercivity Maximum Energy Product Maximum Working Temperature  Reference Chinese Grade
 Reference  Br mT Hci KA/m Hc KA/m (BH)max KJ/m3 Tw
Designation (KG) (KOe) (KOe) (MGOe) C°
Anisotopic Sintered Alnico
Alnico 5 1100.0 ≥49 ≥49 ≥34 450 FLNG34
(11.0) (≥0.61) (≥0.6) (≥4.2)
Alnico 6 1000.0 ≥53 ≥56 ≥28 450 FLNGT28
(10.0) (≥0.66) (≥0.7) (≥3.5)
Alnico 8 850.0 ≥57 ≥120 ≥42 450 FLNGT42
(8.5) (≥0.71) (≥1.5) (≥5.3)
Alnico 8HC 680.0 ≥110 ≥140 ≥33 450 FLNGT33J
(6.8) (≥1.38) (≥1.7) (≥4.1)
Remarks:
  • The above-mentioned data of magnetic parameters and physical properties are given at room temperature.
  • The maximum service temperature of magnet is changeable due to the ratio length and diameter and enviromental factors.
  • If the material you are looking for is not listed, plaese contact technical sales to discuss about your needs.
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