The third-generation rare earth permanent magnet NdFeB is the most powerful permanent magnet among contemporary magnets. Its BHmax value is 5-12 times that of ferrite magnets and 3-10 times that of alnico magnets; its coercive force is equivalent to 5-10 times that of ferrite magnets and 5 to 10 times that of alnico magnets. 15 times, its potential magnetic properties are extremely high, and it can suck up heavy objects 640 times its own weight.

Since the main raw material iron of neodymium iron boron magnets is very cheap, the reserve of rare earth neodymium is 10-16 times more than that of samarium, so its price is much lower than that of samarium cobalt magnets.

The mechanical properties of neodymium iron boron magnets are better than samarium cobalt magnets and alnico magnets, and it is easier to cut, drill and process complex shapes.

The disadvantage of neodymium iron boron magnet is its poor temperature performance, large magnetic loss when used at high temperature, and low maximum working temperature. Generally, it is about 80 degrees Celsius, and the maximum working temperature of a specially treated magnet can reach 200 degrees Celsius. Because the material contains a lot of neodymium and iron, it is easy to rust and it is also a major weakness. Therefore, neodymium iron boron magnets must be surface coated. It can be electroplated with nickel (Ni), zinc (Zn), gold (Au), chromium (Cr), epoxy resin (Epoxy), etc.

NdFeB magnets are currently widely used in industrial aerospace, electronics, electromechanical, instrumentation, medical and other fields. And the use of non-technical fields is becoming more and more extensive, such as adsorption magnets, toys, jewelry and so on.

Production Process:

Ingredients---->Smelting---->Pulverizing---->Forming---->Sintering---->Testing---->Machining---->Plating----> Magnetization---->Inspection---->Packaging

Magnetic Properties of NdFeB Magnets

material Grade	Br		Hcb		Hcj		(BH)max		TW
	T	KGs	KA/m	KOe	KA/m	KOe	KJ/m3	MGOe	°C
N35	1.17-1.21	11.7-12.1	876-899	11.0-11.3	≥955	≥12	263-279	33-35	≤80
N38	1.22-1.26	12.2-12.6	876-923	11.0-11.6	≥955	≥12	287-303	36-38	≤80
N40	1.26-1.29	12.6-12.9	876-923	11.0-11.6	≥955	≥12	303-318	38-40	≤80
N42	1.30-1.33	13.0-13.3	876-926	11.0-11.6	≥955	≥12	318-334	40-42	≤80
N45	1.33-1.37	13.3-13.7	876-926	11.0-11.6	≥955	≥12	342-358	43-45	≤80
N48	1.36-1.42	13.6-14.2	876-926	11.0-11.6	≥955	≥12	358-382	45-48	≤80
N50	1.41-1.45	14.1-14.5	828-907	10.4-11.4	≥876	≥11	382-398	48-50	≤70
N52	1.44-1.48	14.4-14.8	828-907	10.4-11.4	≥876	≥11	394-414	49.5-52	≤70
N35M	1.17-1.21	11.7-12.1	892-915	11.2-11.5	≥1114	≥14	263-279	33-35	≤100
N38M	1.22-1.26	12.2-12.6	907-931	11.4-11.7	≥1114	≥14	287-303	36-38	≤100
N40M	1.26-1.29	12.6-12.9	907-947	11.4-11.9	≥1114	≥14	303-318	38-40	≤100
N42M	1.30-1.33	13.0-13.3	907-947	11.4-11.9	≥1114	≥14	318-334	40-42	≤100
N45M	1.33-1.37	13.3-13.7	907-955	11.4-12.0	≥1114	≥14	334-358	42-45	≤100
N48M	1.36-1.42	13.6-14.2	907-955	11.4-12.0	≥1114	≥14	358-382	45-48	≤100
N50M	1.41-1.45	14.1-14.5	907-971	11.4-12.2	≥1114	≥14	382-398	48-50	≤100
N33H	1.14-1.17	11.4-11.7	820-876	10.3-11.0	≥1353	≥17	247-263	31-33	≤120
N35H	1.17-1.21	11.7-12.1	860-907	10.8-11.4	≥1353	≥17	263-279	33-35	≤120
N38H	1.22-1.26	12.2-12.6	907-947	11.4-11.9	≥1353	≥17	287-303	36-38	≤120
N40H	1.26-1.29	12.6-12.9	907-947	11.4-11.9	≥1353	≥17	303-318	38-40	≤120
N42H	1.30-1.33	13.0-13.3	907-947	11.4-11.9	≥1353	≥17	318-334	40-42	≤120
N45H	1.33-1.37	13.3-13.7	907-947	11.4-11.9	≥1353	≥17	342-358	43-45	≤120
N48H	1.36-1.42	13.6-14.2	907-971	11.4-12.2	≥1274	≥16	358-382	45-48	≤110
N30SH	1.08-1.12	10.8-11.2	804-844	10.1-10.6	≥1592	≥20	223-239	28-30	≤150
N33SH	1.14-1.17	11.4-11.7	820-876	10.3-11.0	≥1592	≥20	247-263	31-33	≤150
N35SH	1.17-1.21	11.7-12.1	860-907	10.8-11.4	≥1592	≥20	263-279	33-35	≤150
N38SH	1.22-1.26	12.2-12.6	907-947	11.4-11.9	≥1592	≥20	287-303	36-38	≤150
N40SH	1.26-1.29	12.6-12.9	907-947	11.4-11.9	≥1592	≥20	303-318	38-40	≤150
N42SH	1.30-1.33	13.0-13.3	907-947	11.4-11.9	≥1592	≥20	318-334	40-42	≤150
N45SH	1.33-1.37	13.3-13.7	907-947	11.4-11.9	≥1512	≥19	342-358	43-45	≤140
N28UH	1.04-1.08	10.4-10.8	780-812	9.8-10.2	≥1990	≥25	207-223	26-28	≤180
N30UH	1.08-1.12	10.8-11.2	804-844	10.1-10.6	≥1990	≥25	223-239	28-30	≤180
N33UH	1.14-1.17	11.4-11.7	820-876	10.3-11.0	≥1990	≥25	247-263	31-33	≤180
N35UH	1.17-1.21	11.7-12.1	860-907	10.8-11.4	≥1990	≥25	263-279	33-35	≤180
N38UH	1.22-1.26	12.2-12.6	907-947	11.4-11.9	≥1990	≥25	287-303	36-38	≤180
N40UH	1.26-1.29	12.6-12.9	907-947	11.4-11.9	≥1990	≥25	303-318	38-40	≤180
N28EH	1.04-1.08	10.4-10.8	780-812	9.8-10.2	≥2388	≥30	207-223	26-28	≤200
N30EH	1.08-1.12	10.8-11.2	804-844	10.1-10.6	≥2388	≥30	223-239	28-30	≤200
N33EH	1.14-1.17	11.4-11.7	820-876	10.3-11.0	≥2388	≥30	247-263	31-33	≤200
N35EH	1.17-1.21	11.7-12.1	860-907	10.8-11.4	≥2388	≥30	263-279	33-35	≤200
N38EH	1.22-1.26	12.2-12.6	860-907	10.8-11.4	≥2388	≥30	287-303	36-38	≤200
N30AH	1.08-1.12	10.8-11.2	804-844	10.1-10.6	≥2786	≥35	223-239	28-30	≤240