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Authors：handler Time：2017-07-07 02-42-02

The third generation rare earth permanent magnet neodymium iron boron is the most powerful permanent magnet in the present era. The BHmax value is 5-12 times of ferrite magnet, AlNiCo magnets 3-10 times; the coercivity equivalent to 5-10 times the ferrite magnet, AlNiCo magnets 5-15 times, its potential for magnetic to high and can suck up equivalent to 640 times its own weight weight.
As a result of the neodymium iron boron magnet iron as the main raw material is very cheap, neodymium rare earth reserves than SM 10-16 times more, so the price also is SmCo magnets much lower.
Mechanical properties of the neodymium iron boron magnet is better than SmCo magnet, alnico magnet, easier cutting and drilling and processing of complex shape.
The deficiency of the neodymium iron boron magnet is its poor temperature performance, high magnetic loss at high temperature, the maximum operating temperature is low. Generally about 80 degrees Celsius, after special treatment of magnets, the maximum operating temperature of up to 200 degrees celsius. Because the material contains a large number of neodymium and iron, it is easy to rust is one of its major weakness. So the neodymium iron boron magnet must be coated on the surface. Nickel (Ni), zinc (Zn), gold (Au), chromium (Cr), epoxy resin (Epoxy), etc..
Neodymium iron boron magnet is widely used in industrial aerospace, electronics, mechanical and electrical, instrumentation, medical and other fields. And the use of non technology areas are also more and more widely, such as the adsorption of magnets, toys, jewelry, etc..
Production flow:
Proportioning, smelting, ingot, powder milling, pressing, sintering and tempering, magnetic testing, milling, machining, plating
Finished product. Among the ingredients is the foundation, sintering and tempering is the key.
Neodymium iron boron magnet blank production tools and performance testing tool: a smelting furnace, swing belt furnace, jaw crusher machine and jet mill, pressing molding machine, vacuum packaging machine, static press and sintering furnace, heat treatment furnace, vacuum, magnetic can test instrument, a Gauss meter.
Neodymium iron boron magnet machine tool: centerless grinding, spheronization machine, double end grinding, flat grinding, slicing machine, double-sided grinding, cutting lines, Taizuan, abnormity mill, and so on.

number	Br		Hcb		Hcj		(BH)_max		TW
number	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

Note: Working temperature is tested under 20°C±2°C, the inevitable loss of magnetic force is no more than 5%.

Typical physical properties

Parameter	Unit	Standard Data
(Tc) Curie Temperature	°C	310-380
(Tw) Maximum Operating Temperature	°C	80-200
Hardness	Hv	620
(r) Electrical Resistivity	WNaN	1.8x10^-4-2.0x10^-4
(D) Density	g/cm³	7.50-7.65
(m rec) Recoil Permeability		1.05
(Hs) Magnetization Field Strength	Koe	≥30
(Hs) Magnetization Field Strength	KA/m	≥2400
Bending Strength	Mpa	295-345
(a_Br) Temp.Coefficient of Br	%/°C	-0.11~-0.12
(a_Hcj) Temp.Coefficient of Hcj	%/°C	-0.5~-0.7

Dimension Range

Block	Length	Width			Thickness
Maximum	250.00mm	180.00mm			50.00mm
Minimum	2.60mm	1.80mm			0.50mm

Ring	Outer Dia	Inner Dia		Thickness
Maximum	220.00mm	80.00mm		50.00mm
Minimum	2.00mm	1.50mm		0.50mm

Disc	Outer Dia		Thickness
Maximum	220.00mm		50.00mm
Minimum	1.00mm		0.50mm

Note three of the above dimensions, can only produce one or two of the largest size, and other special shapes can be produced according to customer samples or drawings.

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