Alnico Magnets

Alnico Magnets

For product technical information, pricing and availability contact our sales department at:
(219) 548-3799
sales@allianceorg.com

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Alnico Magnets, the oldest modern magnets, were used extensively in all industries until the  introduction of Ferrites in the early 1950’s. They are available by either Cast or Sintered production processes and are primarily made of Aluminum, Nickel and Cobalt. Because of their heavy Cobalt content, prices are somewhat volatile. Alnico magnets are more susceptible to demagnetization than other magnet materials and therefore have limited applications. However, because of their high pull strength they are used in lifting or holding devices and in certain sensor applications which require operation at high temperatures.

Alnico Magnet Materials

Alliance Alnico GradesRemanent InductionCoercive ForceIntrinsic Coercive ForceMaximum Energy ProductReversible Temperature CoefficientsContinuous
Working Temp.
Br (Gauss)Hc (Oe)Hci (Oe)(BH)max (MGOe)α
Br
ß
Hci
Tw
(°C)
MinMaxMinMaxMinMaxMinMax%/°C%/°CMax
A-26,8007,3005506005706201.51.7-0.03-0.02450
A-36,0006,4505005505205701.21.5-0.03-0.02500
A-512,00012,9006006606206804.55.0-0.020.01525
A-5DG12,80013,7006807306907406.06.6-0.020.01525
A-5713,00013,9007007507207706.57.2-0.020.01525
A-87,9008,5001,4501,5501,5001,6005.35.9-0.020.01550
A-2S6,8007,3005506005706201.51.7-0.03-0.02450
A-5S11,80012,6006006506106604.24.5-0.020.01525
A-6S9,0009,7006807306907403.43.8-0.020.01525
A-8S7,8008,4001,4301,5301,4801,5804.65.1-0.020.01550
     A-#:  CAST ALNICO                   A-#S: SINTERED ALNICO 
Alliance Alnico GradesDensityTensile StrengthTransverse Rupture ModulusThermal Expansion CoeffiecientElectrical ResistivityCurie Temperature
g/cm3lbs/in3psiPa
x 106
psiPa
x 106
ǁ to M 10-6/°CΩ-cm x10-6@ 20 C°C 
A-27.100.2563,000217,0004812.4065.00810
A-36.900.25012,0008323,00015813.0060.00840
A-57.300.2645,4003710,5007211.4047.00860
A-5DG7.300.2645,200369,0006211.4047.00860
A-577.300.2645,000348,0005511.4047.00860
A-87.300.26410,0006930,00020711.0053.00860
A-2S6.800.24665,00044870,00048312.4068.00810
A-5S6.900.25050,00034555,00037911.3050.00860
A-6S6.900.25055,000379100,00068911.4054.00860
A-8S7.000.25250,00034555,00037911.0054.00860
     A-#:  CAST ALNICO                   A-#S: SINTERED ALNICO 

Alnico Grade Comparison

Alnico Curve Comparisons

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