Evermag Magnets Co.,Ltd.

	Sintered NdFeB Magnets

	Sintered NdFeB Magnetic Properties

	Block Sintered NdFeB

	Cylinder Sintered NdFeB

	Disc Sintered NdFeB

	Ring sintered NdFeB

	Arc Sintered NdFeB

	Ball Sintered NdFeB

	Irregular Sintered NdFeB

	Bonded NdFeB Magnets

	AlNiCo Magnets

	SmCo Magnets

	Ferrite Magnets

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Xinchang Evermag Magnetics Co.,Ltd

No.1181 Building12 The Jade Hill Park Qixing Street,Xinchang,China 312500

Tel:86 13033698966

Fax:86 575 86259055

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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.

The following table below shows Neodymium in comparison with other magnet materials, for temperature limitation, maximum energy and cost.
Magnetic Material	Temperature -Deg.C		Max. Energy - MGOe		Relative Cost

Neodymium Iron Boron		80 - 200		50		33
Samarium Cobalt		350		30		100
Alnico		500		8		20
Ferrite		180		4.5		5

Magnetic rubber		50		0.8		10

Our most advanced technology:we can make two different series of sintered NdFeB magnets--- ordinary book mold alloy and magnets (HAST NdFeB) based on a strip cast alloy which gives a better chemical stability. We has invested in the production technology enabling to use strip cast material.

HAST NdFeB magnets have higher anticorrosion and can last for 7 days under 120 degree Celsius, 95% humidity and 2atmp with loss of weight less than 3mg/cm2.

Surface Treatments and Dimension Range/Nominal Tolerance of Sintered NdFeB Magnets (Neodymium Iron Boron)

Surface Treatments

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

Coating Test Standard of Nickel coating
(1).Salt Spray Test(SST):
Test condition :
Temperature:35C Degree,5% NaCl ,Continous spray for 24 hours.
Test Standard/Criterion:
Coating is good ,doesn’t get off,no bubbles,no dots.no rust appear.
(2)Pressure cooker Test (PCT):
Test condition :
121C and 95% RH and 2 atmosheric pressure, test for 24 hours
Test Standard/Criterion:
Coating does not Get off, there are no air bubbles or dots Appear

Magnetization Directions of Permanent Magnets

Sintered NdFeB Magnet Production Flow Chart

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. ℃
Grade	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 ℃