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Neodymium Magnets, also known as NdFeB or simply Neo, are the most commonly used magnet materials for high tech motors and sensors. After being introduced in the mid 1980’s they have rapidly gained market share due to their high magnetic strength and resistance to demagnetization. They do not have the high temperature resistance of other magnet materials, however they can be used in applications with maximum operating temperatures of 220 C. Because of a high iron content, they will corrode over time if not plated or coated. As with all magnet materials, NdFeB should never be used as a structural element in an application.

Neodymium Magnets Slider

Alliance NdFeB 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
Hcj
Tw
(°C)
Min Max Min Max Min Max Min Max %/°C %/°C Max
N55 14,600 15,000 10,800 12,800 11,000 18,000 52.0 56.0 -0.11 -0.68 70
N53 14,300 14,800 10,700 12,700 12,000 18,000 51.0 54.0 -0.12 -0.65 70
N52 14,200 14,800 10,500 12,500 12,000 18,000 50.0 53.0 -0.12 -0.65 80
N50 14,000 14,500 10,500 12,500 12,000 18,000 48.0 51.0 -0.12 -0.65 80
N48 13,600 14,200 10,500 12,500 12,000 18,000 46.0 49.0 -0.12 -0.65 80
N45 13,300 13,700 10,500 12,500 12,000 18,000 43.0 46.0 -0.12 -0.65 80
N42 12,900 13,300 10,500 12,500 12,000 18,000 40.0 43.0 -0.12 -0.65 80
N40 12,600 12,900 10,800 12,800 12,000 18,000 38.0 41.0 -0.12 -0.65 80
N38 12,200 12,600 10,800 12,800 12,000 18,000 35.0 39.0 -0.12 -0.65 80
N35 11,700 12,200 10,800 12,800 12,000 18,000 33.0 36.0 -0.12 -0.65 80
N33 11,400 11,700 10,800 12,800 12,000 18,000 30.0 34.0 -0.12 -0.65 80
N30 10,800 11,400 10,800 12,800 12,000 18,000 28.0 31.0 -0.12 -0.65 80
N52M 14,500 14,800 12,800 14,800 14,000 20,000 50.0 52.0 -0.12 -0.65 100
N50M 13,900 14,500 13,200 15,200 14,000 20,000 48.0 51.0 -0.12 -0.65 100
N48M 13,700 14,100 12,800 14,800 14,000 20,000 45.0 49.0 -0.12 -0.65 100
N45M 13,300 13,700 12,400 14,400 14,000 20,000 42.0 46.0 -0.12 -0.65 100
N42M 12,900 13,300 12,000 14,000 14,000 20,000 40.0 43.0 -0.12 -0.65 100
N40M 12,600 12,900 11,800 13,800 14,000 20,000 38.0 41.0 -0.12 -0.65 100
N38M 12,200 12,600 11,500 13,500 14,000 20,000 35.0 39.0 -0.12 -0.65 100
N35M 11,700 12,200 11,000 13,000 14,000 20,000 33.0 36.0 -0.12 -0.65 100
N33M 11,400 11,700 10,700 14,700 14,000 20,000 30.0 34.0 -0.12 -0.65 100
N30M 10,800 11,400 10,200 14,200 14,000 20,000 28.0 31.0 -0.12 -0.65 100
N50H 14,100 14,500 13,000 15,000 17,000 25,000 48.0 50.0 -0.11 -0.58 120
N48H 13,700 14,100 12,700 14,700 17,000 25,000 45.0 48.0 -0.11 -0.58 120
N45H 13,300 13,700 12,200 14,200 17,000 25,000 42.0 46.0 -0.11 -0.58 120
N42H 12,900 13,300 12,000 14,000 17,000 25,000 40.0 43.0 -0.11 -0.58 120
N40H 12,600 12,900 11,800 13,800 17,000 25,000 38.0 41.0 -0.11 -0.62 120
H38H 12,200 12,600 11,500 13,500 17,000 25,000 35.0 39.0 -0.11 -0.62 120
N35H 11,700 12,200 11,000 13,000 17,000 25,000 33.0 36.0 -0.11 -0.62 120
N33H 11,400 11,700 10,500 12,500 17,000 25,000 30.0 34.0 -0.11 -0.62 120
N30H 10,800 11,400 10,000 12,000 17,000 25,000 28.0 31.0 -0.11 -0.62 120
N50SH 13,900 14,300 13,000 15,000 20,000 28,000 47.0 50.0 -0.11 -0.60 150
N48SH 13,700 14,100 12,700 14,700 20,000 28,000 46.0 49.0 -0.11 -0.60 150
N46SH 13,500 13,700 12,500 14,500 20,000 28,000 44.0 47.0 -0.11 -0.60 150
N44SH 13,200 13,500 12,300 14,300 20,000 28,000 42.0 45.0 -0.11 -0.60 150
N42SH 12,900 13,200 12,100 14,100 20,000 28,000 40.0 43.0 -0.11 -0.60 150
N40SH 12,600 12,900 11,700 13,700 20,000 28,000 38.0 41.0 -0.11 -0.60 150
N38SH 12,200 12,600 11,300 13,300 20,000 28,000 36.0 39.0 -0.11 -0.60 150
N35SH 11,700 12,200 11,000 12,000 20,000 28,000 33.0 37.0 -0.11 -0.60 150
N33SH 11,400 11,700 10,700 12,700 20,000 28,000 31.0 34.0 -0.11 -0.60 150
N30SH 10,800 11,400 10,200 12,200 20,000 28,000 28.0 32.0 -0.11 -0.60 150
N48UH 13,700 14,100 12,700 14,700 25,000 32,000 46.0 49.0 -0.10 -0.55 180
N46UH 13,500 13,700 12,500 14,500 25,000 32,000 44.0 47.0 -0.10 -0.55 180
N44UH 13,300 13,500 12,300 14,300 25,000 32,000 42.0 45.0 -0.10 -0.55 180
N42UH 12,900 13,300 12,200 14,200 25,000 32,000 40.0 43.0 -0.10 -0.50 180
N40UH 12,600 13,200 11,800 13,800 25,000 32,000 38.0 41.0 -0.10 -0.55 180
N38UH 12,200 12,600 11,500 13,500 25,000 32,000 36.0 39.0 -0.10 -0.55 180
N35UH 11,700 12,200 11,000 13,000 25,000 32,000 33.0 36.0 -0.10 -0.55 180
N33UH 11,400 11,700 10,700 12,700 25,000 32,000 31.0 34.0 -0.10 -0.55 180
N30UH 10,800 11,400 10,200 12,200 25,000 32,000 28.0 31.0 -0.10 -0.50 180
N45EH 13,100 13,700 12,200 14,200 29,000 36,000 42.0 46.0 -0.09 -0.50 200
N42EH 12,900 13,300 12,200 14,200 30,000 36,000 40.0 43.0 -0.09 -0.50 200
N40EH 12,600 12,900 11,800 13,800 30,000 36,000 38.0 41.0 -0.09 -0.50 200
N38EH 12,200 12,700 11,400 13,400 30,000 36,000 36.0 39.0 -0.09 -0.50 200
N35EH 11,700 12,500 11,000 13,000 30,000 36,000 33.0 37.0 -0.09 -0.50 200
N33EH 11,400 11,700 10,700 12,700 30,000 36,000 31.0 34.0 -0.09 -0.50 200
N30EH 10,800 11,400 10,200 12,200 30,000 36,000 28.0 31.0 -0.09 -0.50 200
N38AH 12,200 12,600 11,600 13,600 35,000 42,000 35.0 39.0 -0.09 -0.45 220
N35AH 11,700 12,200 11,100 13,100 35,000 42,000 32.0 36.0 -0.09 -0.45 220
N32AH 11,300 11,700 10,700 12,700 35,000 42,000 30.0 33.0 -0.09 -0.45 220
Alliance NdFeB Grades Density Tensile
Strength
Modulus
of Elasticity
Thermal
Expansion Coefficient /°C
Electrical
Resistivity
Curie    Temp
g/cm3 lbs/in3 psi Pa
x 106
psi
x 106
Pa
x 109
ǁ
to M

to M
Ω-cm x10-6@ 20 C °C 
N55 >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N53 >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N52 >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N50 >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N48 >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N45 >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N42 >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N40 >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N38 >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N35 >7.4 >0.268 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N33 >7.4 >0.268 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N30 >7.4 >0.268 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N52M >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N50M >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N48M >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N45M >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N42M >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N40M >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N38M >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N35M >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N33M >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N30M >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N50H >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N48H >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N45H >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N42H >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N40H >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
H38H >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N35H >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N33H >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N30H >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N50SH >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N48SH >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N46SH >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N44SH >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N42SH >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N40SH >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N38SH >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N35SH >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N33SH >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N30SH >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N48UH >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N46UH >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N44UH >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N42UH >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N40UH >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N38UH >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N35UH >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N33UH >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N30UH >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N45EH >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N42EH >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N40EH >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N38EH >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N35EH >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N33EH >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N30EH >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N38AH >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N35AH >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310
N32AH >7.5 >0.271 12,000 83 22 152 3.4x10-6 -4.8x10-6 160.0 310

Neo Magnets Grade Comparison

Neo Magnets Curve Comparisons

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