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The Sintered NdFeB Magnet has the high remanence, high coercive force, high energy product and high performance. It is easily formed into various sizes, and widely used in mini-motors, meters, sensors, sound device, magnetic suspension system, magnetic transmission machine and iatrical apparatus and other applications. It is prone to corrosion in humid environments, It usually need surface treatment according to customer's requirements to protect magnet. We can offer the coating included: Zinc, Nickel, Silver, Gold-plating, Passivation, Phosphor and Spray Epoxy Resin.


Magnetic Properties of Sintered NdFeB Magnet:

Magnetic Properties of Sintered NdFeB Magnets

Grade Remanence (Br) Coercive Force (HcB) Intrinsic Coercive Force HcJ Max.Energy Product (B-H) Max Max Operation Temp. ℃
mT KG KA/m KOe KA/m KOe KJ/ m3 MGOe Tw ℃
N30 1080-1130 10.8-11.3 ≥ 796 ≥ 10 ≥ 955 ≥ 12 233-247 28-31 80 ℃
N33 1130-1170 11.3-11.7 ≥ 836 ≥ 10.5 ≥ 955 ≥ 12 247-271 31-34 80 ℃
N35 1170-1220 11.7-12.2 ≥ 868 ≥ 10.9 ≥ 955 ≥ 12 263-287 33-36 80 ℃
N38 1220-1250 12.2-12.5 ≥ 899 ≥ 11.3 ≥ 955 ≥ 12 287-310 36-39 80 ℃
N40 1250-1280 12.5-12.8 ≥ 907 ≥ 11.4 ≥ 955 ≥ 12 302-326 38-41 80 ℃
N42 1280-1320 12.8-13.2 ≥ 915 ≥ 11.5 ≥ 955 ≥ 12 318-342 40-43 80 ℃
N45 1320-1380 13.2-13.8 ≥ 923 ≥ 11.6 ≥ 955 ≥ 12 342-366 43-46 80 ℃
N48 1380-1420 13.8-14.2 ≥ 836 ≥ 10.5 ≥955 ≥ 12 366-390 46-49 80 ℃
N50 1400-1450 14.0-14.5 ≥ 796 ≥ 10.0 ≥ 876 ≥ 11 382-406 48-51 60 ℃
N52 1430-1480 14.3-14.8 ≥ 796 ≥ 10.0 ≥ 876 ≥ 11 398-422 50-53 60 ℃
30M 1080-1130 10.8-11.3 ≥ 796 ≥ 10.0 ≥ 1114 ≥ 14 223-247 28-31 100 ℃
33M 1130-1170 11.3-11.7 ≥ 836 ≥ 10.5 ≥ 1114 ≥ 14 247-263 31-33 100 ℃
35M 1170-1220 11.7-12.2 ≥ 868 ≥ 10.9 ≥ 1114 ≥ 14 263-287 33-36 100 ℃
38M 1220-1250 12.2-12.5 ≥ 899 ≥ 11.3 ≥ 1114 ≥ 14 287-310 36-39 100 ℃
40M 1250-1280 12.5-12.8 ≥ 923 ≥ 11.6 ≥ 1114 ≥ 14 302-326 38-41 100 ℃
42M 1280-1320 12.8-13.2 ≥ 955 ≥ 12.0 ≥ 1114 ≥ 14 318-342 40-43 100 ℃
45M 1320-1380 13.2-13.8 ≥ 995 ≥ 12.5 ≥ 1114 ≥ 14 342-366 43-46 100 ℃
48M 1360-1430 13.6-14.3 ≥ 1027 ≥ 12.9 ≥ 1114 ≥ 14 366-390 46-49 100 ℃
50M 1400-1450 14.0-14.5 ≥ 1033 ≥ 13.0 ≥ 1114 ≥ 14 382-406 48-51 100 ℃
30H 1080-1130 10.8-11.3 ≥ 796 ≥ 10.0 ≥ 1353 ≥ 17 223-247 28-31 120 ℃
33H 1130-1170 11.3-11.7 ≥ 836 ≥ 10.5 ≥ 1353 ≥ 17 247-271 31-34 120 ℃
35H 1170-1220 11.7-12.2 ≥ 868 ≥ 10.9 ≥ 1353 ≥ 17 263-287 33-36 120 ℃
38H 1220-1250 12.2-12.5 ≥ 899 ≥ 11.3 ≥ 1353 ≥ 17 287-310 36-39 120 ℃
40H 1250-1280 12.5-12.8

≥ 923

≥ 11.6 ≥ 1353 ≥ 17 302-326 38-41 120 ℃
42H 1280-1320 12.8-13.2 ≥ 955 ≥ 12.0 ≥ 1353 ≥ 17 318-342 40-43 120 ℃
45H 1320-1360 13.2-13.6 ≥ 963 ≥ 12.1 ≥ 1353 ≥ 17 342-366 43-46 120 ℃
48H 1370-1430 13.7-14.3 ≥ 995 ≥ 12.5 ≥ 1353 ≥ 17 366-390 46-49 120 ℃
30SH 1080-1130 10.8-11.3 ≥ 804 ≥ 10.1 ≥ 1592 ≥ 20 223-247 28-31 150 ℃
33SH 1130-1170 11.3-11.7 ≥ 844 ≥ 10.6 ≥ 1592 ≥ 20 247-271 31-34 150 ℃
35SH 1170-1220 11.7-12.2 ≥ 876 ≥ 11.0 ≥ 1592 ≥ 20 263-287 33-36 150 ℃
38SH 1220-1250 12.2-12.5 ≥ 907 ≥ 11.4 ≥ 1592 ≥ 20 287-310 36-39 150 ℃
40SH 1250-1280 12.5-12.8 ≥ 939 ≥ 11.8 ≥ 1592 ≥ 20 302-326 38-41 150 ℃
42SH 1280-1320 12.8-13.2 ≥ 987 ≥ 12.4 ≥ 1592 ≥ 20 318-342 40-43 150 ℃
45SH 1320-1380 13.2-13.8 ≥ 1003 ≥ 12.6 ≥ 1592 ≥ 20 342-366 43-46 150 ℃
28UH 1020-1080 10.2-10.8 ≥ 764 ≥ 9.6 ≥ 1990 ≥ 25 207-231 26-29 180 ℃
30UH 1080-1130 10.8-11.3 ≥ 812 ≥ 10.2 ≥ 1990 ≥ 25 223-247 28-31 180 ℃
33UH 1130-1170 11.3-11.7 ≥ 852 ≥ 10.7 ≥ 1990 ≥ 25 247-271 31-34 180 ℃
35UH 1180-1220 11.8-12.2 ≥ 860 ≥ 10.8 ≥ 1990 ≥ 25 263-287 33-36 180 ℃
38UH 1220-1250 12.2-12.5 ≥ 876 ≥ 11.0 ≥ 1990 ≥ 25 287-310 36-39 180 ℃
40UH 1240-1280 12.5-12.8 ≥ 899 ≥ 11.3 ≥ 1990 ≥ 25 302-326 38-41 180 ℃
28EH 1040-1090 10.4-10.9 ≥ 780 ≥ 9.8 ≥ 2388 ≥ 30 207-231

26-29

200 ℃
30EH 1080-1130 10.8-11.3 ≥ 812 ≥ 10.3 ≥ 2388 ≥ 30 223-247 28-31 200 ℃
33EH 1130-1170 11.3-11.7 ≥ 836 ≥ 10.5 ≥ 2388 ≥ 30 247-271 31-34 200 ℃
35EH 1170-1220 11.7-12.2 ≥ 876 ≥ 11.0 ≥ 2388 ≥ 30 263-287 33-36 200 ℃
38EH 1220-1250 12.2-12.5 ≥ 899 ≥ 11.3 ≥ 2388 ≥ 30 287-310 36-39 200 ℃
28AH 1040-1090 10.4-10.9 ≥ 787 ≥ 9.9 ≥ 2624 ≥ 33 207-231 26-19 230 ℃
30AH 1080-1130 10.8-11.3 ≥ 819 ≥ 10.3 ≥ 2624 ≥ 33 223-247 28-31 230 ℃
33AH 1130-1170 11.3-11.7 ≥ 843 ≥ 10.6 ≥ 2624 ≥ 33 247-271 31-34 230 ℃

Typical Physical Properties of Sintered NdFeB Magnets

Typical Physical Properties

Parameter

Unit

Value

Curie Temperature

Degree ℃

310-370

Maximum Operating Temperature

                             Degree ℃

80-180

Resistivity

.cm

160

Hardness

Hv

560-580

Density

g/cm

7.40

Relative Recoil Permeability

rec

1.05

Saturation Field Strength

KOe

30-40

KA/m

2,400-3,200

Temperature Coefficient of Br

%/

-0.12 ~ -0.10

Temperature Coefficient of HcJ

%/

-0.6


Surface Treatments of Sintered NdFeB Magnets

Surface Treatments of Sintered NdFeB Magnets

Type Information
Metallic Zinc, Nickel,  Nickel + Tin, Nickel + Copper + Nickel, Gold, Ag, Cr
Organic Epoxy, Nickel + Epoxy coating
Temporary Surface Passivation
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