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 Grades Remanent Induction Coercive Force Intrinsic Coercive Force Maximum Energy Product Reversible Temperature Coefficients Continuous
Working Temp.
Br (Gauss) Hc (Oe) Hci (Oe) (BH)max (MGOe) α
Br
ß
Hci
Tw
(°C)
Min Max Min Max Min Max Min Max %/°C %/°C Max
A-2 6,800 7,300 550 600 570 620 1.5 1.7 -0.03 -0.02 450
A-3 6,000 6,450 500 550 520 570 1.2 1.5 -0.03 -0.02 500
A-5 12,000 12,900 600 660 620 680 4.5 5.0 -0.02 0.01 525
A-5DG 12,800 13,700 680 730 690 740 6.0 6.6 -0.02 0.01 525
A-57 13,000 13,900 700 750 720 770 6.5 7.2 -0.02 0.01 525
A-8 7,900 8,500 1,450 1,550 1,500 1,600 5.3 5.9 -0.02 0.01 550
A-2S 6,800 7,300 550 600 570 620 1.5 1.7 -0.03 -0.02 450
A-5S 11,800 12,600 600 650 610 660 4.2 4.5 -0.02 0.01 525
A-6S 9,000 9,700 680 730 690 740 3.4 3.8 -0.02 0.01 525
A-8S 7,800 8,400 1,430 1,530 1,480 1,580 4.6 5.1 -0.02 0.01 550
     A-#:  CAST ALNICO                   A-#S: SINTERED ALNICO 
Alliance Alnico Grades Density Tensile Strength Transverse Rupture Modulus Thermal Expansion Coeffiecient Electrical Resistivity Curie Temperature
g/cm3 lbs/in3 psi Pa
x 106
psi Pa
x 106
ǁ to M 10-6/°C Ω-cm x10-6@ 20 C °C 
A-2 7.10 0.256 3,000 21 7,000 48 12.40 65.00 810
A-3 6.90 0.250 12,000 83 23,000 158 13.00 60.00 840
A-5 7.30 0.264 5,400 37 10,500 72 11.40 47.00 860
A-5DG 7.30 0.264 5,200 36 9,000 62 11.40 47.00 860
A-57 7.30 0.264 5,000 34 8,000 55 11.40 47.00 860
A-8 7.30 0.264 10,000 69 30,000 207 11.00 53.00 860
A-2S 6.80 0.246 65,000 448 70,000 483 12.40 68.00 810
A-5S 6.90 0.250 50,000 345 55,000 379 11.30 50.00 860
A-6S 6.90 0.250 55,000 379 100,000 689 11.40 54.00 860
A-8S 7.00 0.252 50,000 345 55,000 379 11.00 54.00 860
     A-#:  CAST ALNICO                   A-#S: SINTERED ALNICO 

Alnico Grade Comparison

Alnico Curve Comparisons

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