The description of magnets:

NdFeB (Neodymium-Iron-Boron) – is the most powerful rare-earth permanent magnet, because of this, it called super magnet or strong magnet . NdFeB magnet was developed from the year of 1983 and became commercially available in 1984. Neodymium magnet have the highest Br, and BHmax of any magnet formula, NdFeB(Neodymium-Iron-Boron) magnet is used most popular by people in industry and our daily life, because it has superior magnetic properties than other kind of magnet.


The outstanding characteristics are as follows--------
* Higher unit magnetic properties than other magnet and assure you of smaller size and lighter weight in designing devices.
* Being mostly an iron based alloy, NdFeB type rare earth magnet is much more prone to surface oxidation or rust. To eliminate such a problem, the user should consider magnet coating, plating, or suitable surface treatment.
* Being less prone to chipping during handing
* Lower temperature coefficient of magnetic properties than ceramic but higher than SmCo type rare earth      magnet. Therefore, this NdFeB type rare earth magnet will suffer irreversible loss at high temperature

The Nd-Fe-B permanent magnets, which are called the next centurial magnets, are used in a wide range of industries including computer, automobile, electric machinary, electro-sound devices, automatic control, magnetic force mechanism, microwave commnication, petrochemical industry, medical apparatus and equipment. The magnets are the ideal materials for the subminiature magnetic devices with high function.

Magnet Type	Remanence (Br)		HcB		HcJ		(B-H)max		Max.Temp.
	(KGs)	(mT)	(Koe)	(KA/m)	(Koe)	(KA/m)	(MGOe)	(KJ/m3)	℃
N35	11.7-12.2	1170-1220	≥10.9	≥868	≥12	≥955	33-36	263-287	80℃
N38	12.2-12.5	1220-1250	≥11.3	≥899	≥12	≥955	36-39	287-310	80℃
N40	12.5-12.8	1250-1280	≥11.4	≥907	≥12	≥955	38-41	302-326	80℃
N42	12.8-13.2	1280-1320	≥11.5	≥915	≥12	≥955	40-43	318-342	80℃
N45	13.2-13.8	1320-1380	≥11.6	≥923	≥12	≥955	43-46	342-366	80℃
N48	13.8-14.2	1380-1420	≥10.5	≥836	≥12	≥955	46-49	366-390	80℃
N50	14.0-14.5	1400-1450	≥10.0	≥796	≥11	≥876	48-51	382-406	60℃
N52	14.3-14.8	1430-1480	≥10.0	≥796	≥11	≥876	50-53	398-422	60℃
33M	11.3-11.7	1130-1170	≥10.5	≥836	≥14	≥1114	31-33	247-263	100℃
35M	11.7-12.2	1170-1220	≥10.9	≥868	≥14	≥1114	33-36	263-287	100℃
38M	12.2-12.5	1220-1250	≥11.3	≥899	≥14	≥1114	36-39	287-310	100℃
40M	12.5-12.8	1250-1280	≥11.6	≥923	≥14	≥1114	38-41	302-326	100℃
42M	12.8-13.2	1280-1320	≥12.0	≥955	≥14	≥1114	40-43	318-342	100℃
45M	13.2-13.8	1320-1380	≥12.5	≥995	≥14	≥1114	43-46	342-366	100℃
48M	13.6-14.3	1360-1430	≥12.9	≥1027	≥14	≥1114	46-49	366-390	100℃
50M	14.0-14.5	1400-1450	≥13.0	≥1033	≥14	≥1114	48-51	382-406	100℃
35H	11.7-12.2	1170-1220	≥10.9	≥868	≥17	≥1353	33-36	263-287	120℃
38H	12.2-12.5	1220-1250	≥11.3	≥899	≥17	≥1353	36-39	287-310	120℃
40H	12.5-12.8	1250-1280	≥11.6	≥923	≥17	≥1353	38-41	302-326	120℃
42H	12.8-13.2	1280-1320	≥12.0	≥955	≥17	≥1353	40-43	318-342	120℃
45H	13.2-13.6	1320-1360	≥12.1	≥963	≥17	≥1353	43-46	342-366	120℃
48H	13.7-14.3	1370-1430	≥12.5	≥995	≥17	≥1353	46-49	366-390	120℃
35SH	11.7-12.2	1170-1220	≥11.0	≥876	≥20	≥1592	33-36	263-287	150℃
38SH	12.2-12.5	1220-1250	≥11.4	≥907	≥20	≥1592	36-39	287-310	150℃
40SH	12.5-12.8	1250-1280	≥11.8	≥939	≥20	≥1592	38-41	302-326	150℃
42SH	12.8-13.2	1280-1320	≥12.4	≥987	≥20	≥1592	40-43	318-342	150℃
45SH	13.2-13.8	1320-1380	≥12.6	≥1003	≥20	≥1592	43-46	342-366	150℃
28UH	10.2-10.8	1020-1080	≥9.6	≥764	≥25	≥1990	26-29	207-231	180℃
30UH	10.8-11.3	1080-1130	≥10.2	≥812	≥25	≥1990	28-31	223-247	180℃
33UH	11.3-11.7	1130-1170	≥10.7	≥852	≥25	≥1990	31-34	247-271	180℃
35UH	11.8-12.2	1180-1220	≥10.8	≥860	≥25	≥1990	33-36	263-287	180℃
38UH	12.2-12.5	1220-1250	≥11.0	≥876	≥25	≥1990	36-39	287-310	180℃
40UH	12.5-12.8	1250-1280	≥11.3	≥899	≥25	≥1990	38-41	302-326	180℃
28EH	10.4-10.9	1040-1090	≥9.8	≥780	≥30	≥2388	26-29	207-231	200℃
30EH	10.8-11.3	1080-1130	≥10.2	≥812	≥30	≥2388	28-31	223-247	200℃
33EH	11.3-11.7	1130-1170	≥10.5	≥836	≥30	≥2388	31-34	247-271	200℃
35EH	11.7-12.2	1170-1220	≥11.0	≥876	≥30	≥2388	33-36	263-287	200℃
38EH	12.2-12.5	1220-1250	≥11.3	≥899	≥30	≥2388	36-39	287-310	200℃
28AH	10.4-10.9	1040-1090	≥9.9	≥787	≥33	≥2642	26-29	207-231	230℃
30AH	10.8-11.3	1080-1130	≥10.3	≥819	≥33	≥2642	28-31	223-247	230℃
33AH	11.3-11.7	1130-1170	≥10.6	≥843	≥33	≥2642	31-34	247-271	230℃

if you have any ideas or any interest in my products, pls feel free to contact me at any time.