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Technical Parameters

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Technical Parameters

Technical Parameters

Material Main Magnetic Properties (Room Temperature 20℃)
No. Grade Br Hcj Hcj (BH)max Maxmum Working Temperature ℃
T kGs kA/m kOe kA/m kOe kJ/m3 MGOe
Minimum value Minimum value Minimum value Range
1 N20 0.95 9.5 438 5.5 478 6 143~167 18~21 60
2 N25 1 10 478 6 558 7 183~207 23~26 60
3 N28 1.04 10.4 558 7 637 8 207~231 26~29 60
4 N30 1.08 10.8 637 8 717 9 223~247 28~31 60
5 N33 1.13 11.3 717 9 797 10 247~271 31~34 60
6 N35 1.18 11.8 860 10.8 960 12 263~287 33~36 80
7 N38 1.23 12.3 860 10.8 960 12 278~310 36~39 80
8 N40 1.26 12.6 860 10.8 960 12 302~326 38~41 80
9 N42 1.29 12.9 860 10.8 960 12 318~342 40~43 80
10 N45 1.33 13.3 860 10.8 960 12 342~366 43~46 80
11 N48 1.37 13.7 836 10.5 960 12 358~390 45~49 80
12 N50 1.39 13.9 836 10.5 960 12 374~406 47~51 80
13 N52 1.42 14.2 836 10.5 960 12 390~422 49~52 80
14 N54 1.45 14.5 836 10.5 960 12 400~432 50~54 80
15 N56 1.48 14.8 836 10.5 960 12 416~448 52~56 80
16 N58 1.5 15 836 10.5 960 12 424~456 54~58 80
17 33M 1.14 11.4 844 10.6 1114 14 239~263 30~33 100
18 35M 1.18 11.8 860 10.8 1114 14 263~287 33~36 100
19 38M 1.23 12.3 876 11 1114 14 287~310 36~39 100
20 40M 1.26 12.6 910 11.4 1114 14 302~326 38~41 100
21 42M 1.29 12.9 938 11.8 1114 14 318~342 40~43 100
22 45M 1.33 13.3 971 12.2 1114 14 342~366 43~46 100
23 48M 1.37 13.7 1012 12.7 1114 14 358~390 45~49 100
24 50M 1.39 13.9 1035 13 1114 14 374~406 47~51 100
25 52M 1.42 14.2 1035 13 1114 14 390~416 49~52 100
26 54M 1.45 14.5 1035 13 1114 14 400~432 50~54 100
27 30H 1.08 10.8 804 10.1 1353 17 223~248 28~31 120
28 33H 1.14 11.4 844 10.6 1353 17 247~263 30~33 120
29 35H 1.18 11.8 876 11 1353 17 263~287 33~36 120
30 38H 1.23 12.3 910 11.4 1353 17 287~310 36~39 120
31 40H 1.26 12.6 930 11.7 1353 17 302~326 38~41 120
32 42H 1.29 12.9 957 12 1353 17 318~342 40~43 120
33 45H 1.33 13.3 995 12.5 1353 17 342~366 43~46 120
34 48H 1.37 13.7 1000 12.8 1353 17 358~390 45~49 120
35 50H 1.39 13.9 1035 13 1353 17 374~406 47~51 120
36 52H 1.42 14.2 1050 13.3 1274 16 390~422 49~53 120
37 54H 1.45 14.5 1075 13.5 1274 16 406~438 51~55 120
38 30SH 1.08 10.8 812 10.2 1592 20 223~248 28~31 150
39 33SH 1.14 11.4 836 10.5 1592 20 247~271 31~34 150
40 35SH 1.18 11.8 876 11 1592 20 263~287 33~36 150
41 38SH 1.23 12.3 886 11.1 1592 20 287~310 36~39 150
42 40SH 1.26 12.6 912 11.5 1592 20 302~326 38~41 150
43 42SH 1.29 12.9 938 11.8 1592 20 318~342 40~43 150
44 45SH 1.33 13.3 938 11.8 1592 20 342~366 43~46 150
45 48SH 1.37 13.7 1035 12.8 1592 20 358~390 45~49 150
46 50SH 1.39 13.9 1035 13 1592 20 374~406 47~51 150
47 52SH 1.42 14.2 1059 13.3 1512 19 390~422 49~53 150
48 54SH 1.45 14.5 1075 13.5 1512 19 406~438 51~55 150
49 30UH 1.08 10.8 756 9.5 1990 25 223~247 28~31 180
50 33UH 1.14 11.4 816 10.3 1990 25 247~271 31~34 180
51 35UH 1.18 11.8 845 10.6 1990 25 263~287 33~36 180
52 38UH 1.23 12.3 886 11.1 1990 25 287~310 36~39 180
53 40UH 1.26 12.6 912 11.5 1990 25 302~326 38~41 180
54 42UH 1.29 12.9 938 11.8 1990 25 318~342 40~43 180
55 45UH 1.33 13.3 976 12.2 1911 24 342~366 43~46 180
56 48UH 1.37 13.7 1019 12.8 1911 24 358~390 45~49 180
57 50UH 1.39 13.9 1035 13 1911 24 374~406 47~51 180
58 28EH 1.05 10.5 756 9.5 2388 30 207~231 26~29 200
59 30EH 1.08 10.8 756 9.5 2387 30 223~247 28~31 200
60 33EH 1.14 11.4 816 10.3 2387 30 247~271 31~34 200
61 35EH 1.18 11.8 883 11.1 2387 30 236~287 33~36 200
62 38EH 1.22 12.2 923 11.6 2387 30 279~310 35~39 200
63 40EH 1.25 12.5 947 11.9 2387 30 295~326 37~41 200
64 42EH 1.28 12.8 971 12.2 2387 30 310~342 39~43 200
65 45EH 1.33 13.3 995 12.5 2387 30 342~366 43~46 200
66 48EH 1.37 13.7 1019 12.8 2387 30 358~390 45~49 200
67 28AH 1.05 10.5 756 9.5 2786 35 207~231 26~29 220
68 30AH 1.08 10.8 804 10.1 2786 35 223~247 28~31 220
69 33AH 1.14 11.4 816 10.2 2786 35 247~271 31~34 220
70 35AH 1.18 11.8 845 10.6 2786 35 263~287 33~36 220
71 38AH 1.22 12.2 932 11.6 2627 33 279~310 35~39 220
72 40AH 1.25 12.5 947 11.9 2627 33 295~326 37~41 220
73 42AH 1.28 12.8 971 12.2 2627 33 310~342 39~43 220
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Technical Parameters

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Technical Parameters

Physical Properties of Sintered NdFeB

Temp.Coeff. of Br
(reversible temperature coefficient)		 -0.09~-0.11%℃ Temp. Coeff. of He -0.50~-0.60%℃
Density 7.4〜7.6 g/cm3 Electrical Resistivity 114 μΩ.cm
Vickers Hardness 600 Hv Flexural Strength 25 Kg/mm
Tensile Strength 8.0 Kg/mm3 Coeff. of Thermal Expansion 4x10-6/℃
Specific Heat 0.12 Kca/(kg,℃) Thermal Conductivity 7.7 Kca/(m.h.℃)
Young's Modulus (Young's Tensile Strength) 1.6x1011 N/m3 Rigidity 0.64 N/m2
Poisson's Ratio 0.24 Compressibility 9.8x10-12m2/N
Curie Temperature 310-340 ℃ Relative Recoil Permeability prev 1.05
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Technical Parameters

Dimensional deviation (unit: mm)

Shape Schematic Size(mm)
Axial Vertical
Block 30<W<100；15<L<80；20<H<60
100≤W≤240；30<L<240；30<H<60
240<W<300；40<L<120；30<H<60
Disk 6≤D<8；20<H<32
8≤D<9.5；20<H<36
9.5≤D<32；20<H<44
32≤D<250；22<H<60		 8≤D<17；20<H<32
17≤D<90；22<H<60
Ring 18≤D<32；20<H<35
32≤D<250；20<H<45		 20≤D≤60
8≤(D-d）/2<15
25≤H≤40
Arc 25≤W≤55；
15≤T≤40；
25≤H≤55；

25≤W≤75

25≤T≤50

25≤H≤100

 

Dimensional deviation (unit: mm)

Size Allowable deviation of sintered surface Allowable deviation of working surface
Perpendicular to the pressing direction Direction of suppression Flat grinding Internal and external round grinding Wire cutting slice
≤10 ±0.25 ±0.30 ±0.04 ±0.05 ±0.06 ±0.05
10~20 ±0.40 ±0.45 ±0.05 ±0.05 ±0.08 ±0.08
20~50 ±0.60 ±0.70 ±0.06 ±0.05 ±0.10 ±0.10
50~80 ±1.00 ±1.10 ±0.08 ±0.05 ±0.10 ±0.10
80~150 ±1.00 ±1.10 ±1.15 ±0.15

  

Shape deviation (unit: mm)

Variation type Variation type Basic size（mm） Deviation
Parallelism Working surface room One-half of the tolerance value
Verticality Between sintered surfaces Random 90°±1°
Between machined surface and sintered surface 90°±1°
Working surface room 90°±0.15°
Concentricity Between sintered surfaces Outer diameter ≤14 ±0.35mm
14~24 ±0.60mm
24~40 ±0.80mm
40~60 ±1.100mm
60~80 ±1.150mm
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