NdFeB Magnets

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.

>>Production Chart of Sintered NdFeB

>>Property of NdFeB Magnets

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 ℃

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 ℃
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

>>Properties of NdFeB Magnets

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 ℃

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 ℃
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 ℃

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. ℃
Grade	mT	KG	KA/m	KOe	KA/m	KOe	KJ/ m3	MGOe	Tw ℃
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

The Applications Field of Magnets
**MOTORS	**ACTUATORS
--DC Motors	--Computer Drive Actuator
--DC Brushless Motors	--Loudspeakers
--Stepping Motors	--Research Area
--Magnetic Pumps	--Linear Encoders
--Linear Motors	--CD Rom Actuators
--Synchronous Motors	--Military Defense Use
--Washing Machine Motors	--Electromagnets
--Electric Motors for Fans	--Circular Encoders
--CD Rom Actuators
--Automotive Industry
--Rotor Magnets
**COUPLING	**SENSORS
--Magnetic Attachment	--Tachometer
--Magnetic Chuck	--Electricity Meter
--Magnetic Coupling	--Timers
--Magnetic Brakes	--Abs Automotive Sensors
--Flywheels	--Magnetic Sensors
--General Coupling Systems	--Reserach Area
--Magnetic Lifting	--Remote Control Valves
--Magnetic Bearing	--Motor Valves
--Magnetic Drives	--Speed Meter
--Magnetic Clutches	--Water Flux Meter

**Other Special Applications

--Toys

--Head Printers

--Electronic Beams Systems

--Sensor for Pneumatic Cylinders

--Magnet Valves

--Motor Valves

--Loudspeakers

--Magnetic Pumps

**Applications of Automotive Industry

**Applications of Household Industry

>>Coatings of NdFeB Magnets

Available Coatings
Surface	Coating	Thickness (Microns)	Color	Resistance
Passivation		1	Silver Grey	Temporary Protection
Nickel	Ni+Ni	10-20	Bright Silver	Excellent Against Humidity
Nickel	Ni+Cu+Ni	10-20	Bright Silver	Excellent Against Humidity
Zinc	Zn	8-20	Bright Blue	Good Against Salt Spray
Zinc	C-Zn	8-20	Bright Blue	Good Against Salt Spray
Tin	Ni+Cu+Sn	15-20	Shinny Color	Excellent Against Humidity
Gold	Ni+Cu+Au	10-20	Gold	Superior Against Humidity
Copper	Ni+Cu	10-20	Gold	Temporary Protection
Epoxy	Epoxy	15-25	Black, Red, Grey	Excellent Against Humidity& Salt Spray
	Ni+Cu+Epoxy
	Zn+Epoxy
Chemical	Ni	10-20	Silver Grey	Excellent Against Humidity
Parylene	Parylene	5-20	Grey	Excellent Against Humidity, Salt Spray, Superior Against Solvents, Gases, Fungi and Bacteria, FDA Approved

NiCuNI: The Nickel-Copper-Nickel(Ni-Cu-Ni) coating has excellent physical and chemical properties, like corrosion resistance, hardness, abrasive resistance

Au： Excellent resistance to high temperature, corrosion and colour changing

Ag： Enhanced corrosion resistance, increasing the conductivity

Epxoy： Epoxy resin has good physical and chemical properties, and has excellent adhesion strength on the surface of the metal and nonmetal materials, good dielectric properties

Zn： Blue white zinc coating is generally thinner than the Ni-Cu-Ni coating and anticorrosion ability is relatively good. Blue white zinc coating after