AlNiCo Cast Permanent Magnetic Alloys

AlNiCo8/4, AlNiCo9/5, AlNiCo12/6, AlNiCo17/9, AlNiCo37/5, AlNiCo44/5, AlNiCo52/6, AlNiCo26/6, AlNiCo38/11, AlNiCo60/11, AlNiCo36/15, AlNiCo28/10, AlNiCo44/14, AlNiCo72/11, AlNiCo80/12

Alnico is the first developed permanent magnet material. It is an alloy composed of aluminum, nickel, cobalt, iron and other trace metal elements. Alnico permanent magnet material was successfully developed in the 1930s. At that time, it had the best magnetic performance and small temperature coefficient, so it was most widely used in permanent magnet motors.

Chemical Composition and Magnetic Properties

AlloyChemical Composition, %Magnetic propertiesTypical density/g.cm-3
AlCoCuNbNiTiFeMaximum eneMax energy product (BH)max, kJ.m-2Magnetic retentivity Br/mTCorecive force Hcb/kA.m-1Corecive force Hci/kA.m-1Relative recovery perameability/μr
Typical valueSpecified minimum value
AlNiCo8/411-130-12-421-280-1Rest852040434.5-5.56.9
AlNiCo9/511-130-52-421-280-1Rest955044476.0-7.0
AlNiCo12/69-1312-172-618-240-1Rest11.663052554.0-5.5
AlNiCo17/96-824-343-613-195-9Rest1758080863.0-4.07.3
AlNiCo37/58-923-263-40-114-16Rest37118048493.0-4.57.3
AlNiCo44/58-923-263-40-113-15Rest44120052532.5-4.07.3
AlNiCo52/68-923-263-40-113-15Rest52125055561.5-3.07.3
AlNiCo26/67-925-273-40-313-150-1Rest2690056683.5-5.57.3
AlNiCo38/116-830-363-40-113-154-6Rest388001101121.5-2.57.3
AlNiCo60/116-835-392-40-113-154-6Rest609001101121.5-2.57.3
AlNiCo36/156-838-422-40-113-157-9Rest367001401481.5-2.57.3
AlNiCo28/10*6-824-343-60-113-195-9Rest287501041051.5-2.57.3
AlNiCo44/14*6-835-392-40-113-157-9Rest448001361401.5-2.57.3
AlNiCo72/11**6-834-362-40-113-157-9Rest7210501121141.5-2.57.3
AlNiCo80/12**6-834-422-40-113-157-9Rest8010501201221.5-2.57.3

Physical Properties

AlloyL/DTemperature coefficient αBr/%.K-1
LNG403-0.016
4-0.016
8-0.022
LNGT283.6-0.02
8-0.032
LNGT322-0.001
3-0.005
6-0.007
Curie temperature ℃850-890
Maximum working temperature ℃550
Density g/cm-37.3
Hardness HRC45-60

Available Products and Specifications

Rod, Bar, Wire and ForgingsGB/T17951-2000
Plate, Sheet and StripGB/T17951-2000
Pipe and TubeGB/T17951-2000
Welding Product
Others

Features

AlNiCo cast permanent magnetic alloy is one of the most important permanent materials with excellent permanent magnetic properties and temperature stability.

Applications

They are widely applied for producing transducers, mini motors, moment appliances, flowmeters, and precision instruments.