Flexible NdFeB magnet introduction and performance sheet

- Apr 19, 2019-

The third generation of rare earth permanent magnet NdFeB is the most powerful permanent magnet in contemporary magnets. Its BHmax is 5-12 times higher than ferrite magnet and 3-10 times higher than al-ni-co magnet. Its coercivity is 5-10 times higher than ferrite magnet and 5-15 times higher than aluminum-nickel-cobalt magnet.


Because the cost of iron the main raw material of NdFeB's is low, and the the reserves of rare earth neodymium is 10 to 16 times more than rare-earth Samarium, so its price is also much lower than samarium-cobalt magnet.


NdFeB performs mechanically better than samarium cobalt magnets and aluminum-nickel-cobalt magnets, making it easier to cut and drill holes and process complex shapes.


NdFeB has the disadvantage of poor temperature resistance and high magnetic losses when used at high temperatures. Generally about 80 degrees Celsius, after special treatment, NdFeB maximum working temperature can reach 200 degrees Celsius.


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


Typical physical properties
参数 Parameter单位 Unit标称值 Standard Data
居里温度(Tc)                     Curie Temperature
°C
310-380
最高工作温度(Tw)    Maximum Operating Temperature
°C
80-200
硬度                                    Hardness
Hv
620
电阻率(r)                      Electrical Resistivity
W.cm
1.8x10-4-2.0x10-4
密度(D)                                  Density
g/cm3
7.50-7.65
回复磁导率(m rec)                Recoil Permeability
1.05
磁化场强度(Hs)           Magnetization Field Strength
Koe
≥30
KA/m
≥2400
抗弯强度                         Bending Strength
Mpa
295-345
剩磁温度系数(aBr)           Temp.Coefficient of Br
%/°C
-0.11~-0.12
内禀矫顽力温度系数(aHcj)    Temp.Coefficient of Hcj
%/°C
-0.5~-0.7
尺寸范围 Dimension Range
方块形 Block长度 Length宽度 Width厚度 Thickness
最大 Maximum250.00mm180.00mm50.00mm
最小 Minimum2.60mm1.80mm0.50mm

圆环形 Ring外径 Outer Dia内径 Inner Dia厚度 Thickness
最大 Maximum220.00mm80.00mm50.00mm
最小 Minimum2.00mm1.50mm0.50mm

圆饼形 Disc外径 Outer Dia厚度 Thickness
最大 Maximum220.00mm50.00mm
最小 Minimum1.00mm0.50mm






表面处理 Surface Coating
镀锌镀镍镀镍铜镍镀铬镀金镀银磷化环氧包封
Zinc
coating
Nickel
coating
Nickel-Copper
-Nickel coating
Chrome
coating
Au
coating
Ag
coating
Phosphate
Epoxy
sealing


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