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Sintered NdFeB Magnets

Sintered NdFeB Magnets is the strongest permanent magnet with high performance and high magnetic energy product. Sintered NdFeB magnetic steel is composed of various metal elements such as praseodymium neodymium, iron, and boron, and is made through processes such as melting, hydrogen breaking, powder milling, forming, sintering, machining, and electroplating. These NdFeB magnetic steels are widely used in various fields.

Manufacturing process of sintered NdFeB magnetic steel

  • 配比
    1
    1

    Proportioning

  • 熔炼
    2
    2

    Smelt

  • 氢破
    3
    3

    Hydrogen Demolish

  • 气流磨
    4
    4

    Airflow Mill

  • 成型
    5
    5

    Forming

  • 烧结和退火
    6
    6

    Sintering and Aging

  • 检查
    7
    7

    Inspect

  • 切割/加工
    8
    8

    Machining

  • 晶界扩散
    9
    9

    Grain Boundary Diffusion

  • 表面处理
    10
    10

    Surface Treatment

  • 检查
    11
    11

    Inspect

  • 包装
    12
    12

    Package

  • 交货
    13
    13

    Transport

Properties of sintered NdFeB magnetic steel

N M H SH UH EH、AH
Magnetic properties of N series magnets
negatelevelmagnetic propertiesmaximum operating temperature TW(oC)
remanence,Br mT or kGscoercive force、Hcb kA/m or kOe

Intrinsic coercivity,H
cJkA/m or kOe

maximum energy product,
(BH) max kJ/m3or MGOe
1N551470-1530 (14.7-15.3)860(10.8)876(11)414-438 (52-56)70
2N521430-1480 (14.3-14.8)860(10.8)876(11)398-422 (50-53)70
3N501400-1450 (14.0-14.5)860(10.8)960(12)382-406 (48-51)70
4N481380-1420 (13.8-14.2)836(10.5)900(11)366-390 (46-49)80
5N451320-1380 (13.2-13.8)876(11.0)960(12)342-366 (43-46)80
6N421280-1320 (12.8-13.2)923(11.6)960(12)318-342 (40-43)80
7N401250-1280 (12.5-12.8)923(11.6)960(12)302-326 (38-41)80
8N381220-1250 (12.2-12.5)899(11.3)960(12)287-310 (36-39)80
9N351180-1220 (11.8-12.2)868(10.9)960(12)263-287 (33-36)80
10N331130-1180 (11.3-118)836(10.5)960(12)247-270 (31-34)80
11N301080-1130 (10.8-11.3)796(10)960(12)223-247 (28-31)80


Magnetic properties of M series magnets
negatelevelmagnetic propertiesmaximum operating temperature TW(oC)
remanence,Br mT or kGscoercive force、Hcb kA/m or kOe

Intrinsic coercivity,H
cJkA/m or kOe

maximum energy product,
(BH) max kJ/m3or MGOe
1N55M1470-1530 (14.7-15.3)1035(13.0)1114(14)414-438 (52-56)100
2N52M1430-1480 (14.3-14.8)1035(13.0)1114(14)398-414 (50-52)100
3N50M1400-1450 (14.0-14.5)1035(13.0)1114(14)382-406 (48-51)100
4N48M1380-1430 (13.7-14.3)1027(12.9)1114(14)366-390 (46-49)100
5N45M1330-1380 (13.2-13.8)995(12.5)1114(14)342-366 (43-46)100
6N42M1280-1330 (12.8-13.2)955(12.0)1114(14)318-342 (40-43)100
7N40M1250-1280 (12.5-12.8)923(11.6)1114(14)302-326 (38-41)100
8N38M1220-1250 (12.2-12.5)899(11.3)1114(14)287-310 (36-39)100
9N35M1180-1220 (11.8-12.2)868(10.9)1114(14)263-287 (33-36)100
10N33M1130-1180 (11.3-11.8)836(10.5)1114(14)247-270 (31-34)100
11N30M1080-1130 (10.8-11.3)796(10.0)1114(14)223-247 (28-31)100


Magnetic properties of H series magnets
negatelevelmagnetic propertiesmaximum operating temperature TW(oC)
remanence,Br mT or kGscoercive force、Hcb kA/m or kOe

Intrinsic coercivity,H
cJkA/m or kOe

maximum energy product,
(BH) max kJ/m3or MGOe
1N54H1450-1530 (14.5-15.3)1035(13.0)1274(16)414-438 (52-55)120
2N52H1430-1480 (14.3-14.8)1035(13.0)1274(16)398-414 (50-52)120
3N50H1400-1450 (14.0-14.5)1035( 13.0)1274(16)382-406 (48-51)120
4N48H1370-1430 (13.7-14.3)1035(13.0)1274(16)366-390 (46-49)120
5N46H1330-1380 (13.3-13.8)1018(12.8)1274(16)350-374 (44-47)120
6N45H1330-1380 (13.3-13.8)1010(12.7)1353(17)342-366 (43-46)120
7N44H1310-1360 (13.1-13.6)1003(12.6)1353(17)326-358 (42-45)120
8N42H1280-1330 (12.8-13.3)995(12.5)1353(17)318-342 (40-43)120
9N40H1250-1280 (12.5-12.8)940(11.8)1353( 17)302-326 (38-41)120
10N38H1220-1250 (12.2-12.5)899(11.3)1353(17)287-310 (36-39)120
11N35H1180-1220 (11.8-12.2) 876(11.0)1353( 17)263-287 (33-36)120
12N33H1130-1180 (11.3-11.8)844(10.6)1353( 17)247-271 (31-34)120
13N30H1080-1130 (10.8-11.3)812(10.2)1353(17)223-247 (28-31)120


Magnetic properties of SH series magnets
negatelevelmagnetic propertiesmaximum operating temperature TW(oC)
remanence,Br mT or kGscoercive force、Hcb kA/m or kOe

Intrinsic coercivity,H
cJkA/m or kOe

maximum energy product,
(BH) max kJ/m3or MGOe
1N52SH1430-1450 (14.3-14.5)1050(13.2)1600( 20)406-430 (51-54)150
2N5OSH1400-1430 (14.0-14.3)1035(13.0)1600(20)390-406 (49-51)150
3N48SH1370-1430 (13.7-14.3)1003(12.6)1600(20)366-390 (46-49)150
4N45SH1320-1380 (13.2-13.8)1003(12.6)1600(20)342-366 (43-46)150
5N44SH1310-1350 (13.1-13.5)1003(12.6)1600(20)334-358 (42-45)150
6N42SH1280-1320 (12.8-13.2)995(12.5)1600(20)318-342 (40-43)150
7N40SH1250-1280 (12.5-12.8)947(11.9)1600( 20)302-326 (38-41)150
8N38SH1220-1250 (12.2-12.5)931(11.7)1600(20)287-310 (36-39)150
9N35SH1180-1220 (11.8-12.2)907(11.4)1600(20)263-287 (33-36)150
10N33SH1130-1180 (11.3-11.8)844(10.6)1600(20)247-271 (31-34)150
11N30SH1080-1130 (10.8-11.3)804(10.01)1600( 20)223-247 (28-31)150


Magnetic properties of UH series magnets
negatelevelmagnetic propertiesmaximum operating temperature TW(oC)
remanence,Br mT or kGscoercive force、Hcb kA/m or kOe

Intrinsic coercivity,H
cJkA/m or kOe

maximum energy product,
(BH) max kJ/m3or MGOe
1N45UH1310-1350 (13.1-13.5)1003(12.6)2000(25)334-358 (42-45)180
2N42UH1280-1320 (12.8-13.2)907(11.4)2000(25)318-342 (40-43)180
3N40UH1250-1280 (12.5-12.8)907(11.4)2000(25)302-326 (38-41)180
4N38UH1220-1250 (12.2-12.5)907(11.4)2000(25)287-310 (36-39)180
5N35UH1180-1220 (11.8-12.2)875(11.0)2000(25)263-287 (33-36)180
6N33UH1130-1180 (11.3-11.8)844(10.6)2000(25)247-271 (31-34)180
7N30UH1080-1130 (10.8-11.3)835(10.5)2000(25)223-247 (28-31)180
8N28UH1020-1080 (10.2-10.8)764(9.6)2000(25)207-239 (26-30)180



Magnetic properties of EH series and AH series magnets
negatelevelmagnetic propertiesmaximum operating temperature TW(oC)
remanence,Br mT or kGscoercive force、Hcb kA/m or kOe

Intrinsic coercivity,H
cJkA/m or kOe

maximum energy product,
(BH) max kJ/m3or MGOe
1N42EH1280-1310 (12.8-13.1)907(11.4)2388(30)320-340 (38-41)200
2N40EH1250-1280 (12.5-12.8)907(11.4) 2388(30)302-326 (38-41)200
3N38EH1220-1250 (12.2-12.5)907(11.4)2388(30)287-310 (36-39)200
4N35EH1180-1220 (11.8-12.2)876(11.0)2388(30)263-287 (33-36)200
5N33EH1130-1180 (11.3-11.8)812(10.2)2388(30)247-271 (31-34)200
6N30EH1080-1130 (10.8-11.3)812(10.2)2388(30)223-247 (28-31)200
7N28EH1040-1080 (10.4-10.8)780(9.8)2400(30)207-231 (26-29)200
8N38AH1220-1250 (12.2-12.5)907(11.4)2706(34)287-310 (36-39)240
9N35AH1180-1220 (11.8-12.2)812(10.2)2785(35)263-287 (33-36)240
10N33AH1130-1180 (11.3-11.8)812(10.2)2785(35)247-271 (31-34)240
11N30AH1080-1130 (10.8-11.3)812(10.2)2785(35)223-247 (28-31)240



Notes

  • The above data was developed with reference to the Chinese national standard GB/T 3560

  • Testing method according to the magnetic material testing standard GB/T3217

  • For high temperature characteristics, specifications should be determined according to customer requirements.

  • Conversion between SI and CGS: 1t = 10kGs,1 koe = 79.6ka/m,1 mgoe = 7.96kj/m3

  • The maximum operating temperature refers to the irreversible magnetic flux loss during an open circuit test; le; 5%, And the temperature point when the PC value of the magnet is L/D=0.7.


List of grain boundary diffusion grades

Sintered Nd-Fe-B Magnets Grain Boundary Diffusion


Sintered Nd-Fe-B Magnets Grain Boundary Diffusion


GBDperformance

levelremanence,Br mT or kGscoercive force、Hcb kA/m or kOe

intrinsic coercivity,H

cJ kA/m or kOe

maximum energy product,

(BH) maximum kJ/m3 or MGOe

Maximum working temperature TW(°C)
G55H1440-1480(14.4-14.8)≥ 1061(≥ 13.3)≥ 1353(≥ 17)398-422 (53-56)120
G52H1410-1470(14.1-14.7)≥ 1050(≥ 13.2)≥ 1353(≥ 17)398-422 (50-53)120
G55SH1440-1480(14.4-14.8)≥ 1050(≥ 13.3)≥ 1592(≥ 20)398-422 (53-56)150
G52SH1430-1450(14.3-14.5)≥ 1050(≥ 13.2)≥ 1592(≥ 20)406-430 (51-54)150
G5OSH1400-1450(14.0-14.5)≥ 1035(≥ 13.0)≥ 1592(≥ 20)382-406 (48-51)150
G48SH1370-1430(13.7-14.3)≥ 1035(≥ 13.0)≥ 1592(≥ 20)366-390 (46-49)150
G45SH1320-1370(13.2-13.7)≥ 1003(≥ 12.6)≥ 1592(≥ 20)342-366 (43-46)150
G52UH1410-1470(14.1-14.6)≥ 1050(≥ 13.2)≥ 1990(≥ 25)398-422 (50-53)180
G50UH1400-1450(14.0-14.5)≥ 1035(≥ 13.0)≥ 1990(≥ 25)382-406 (48-51)180
G48UH1370-1430(13.7-14.3)≥ 1035(≥ 13.0)≥ 1990(≥ 25)366-390 (46-49)180
G45UH1300-1360(13.0-13.6)≥ 1003(≥ 12.6)≥ 1990(≥ 25)342-366 (43-46)180
G42UH1280-1340(12.8-13.4)≥ 907(≥ 11.4)≥ 1990(≥ 25)318-342 (40-43)180
G40UH1260-1310(12.6-13.1)≥ 907(≥ 11.4)≥ 1990(≥ 25)302-326 (38-41)180
G50EH1400-1450(14.0-14.5)≥ 1035(≥ 13.0)≥ 2388(≥ 30)382-406 (48-51)200
G48EH1370-1430(13.7-14.3)≥ 1035(≥ 13.0)≥ 2388(≥ 30)366-390 (46-49)200
G45EH1300-1360(13.0-13.6)≥ 1003(≥ 12.6)≥ 2388 (≥ 30)342-366 (43-46)200
G42EH1280-1320(12.8-13.2)≥ 907(≥ 11.4)≥ 2388 (≥ 30)318-342 (40-43)200
G40EH1260-1310(12.6-13.1)≥ 907(≥ 11。4)≥ 2388 (≥ 30)302-326 (38-41)200
G38EH1220-1270(12.2-12.7)≥ 907(≥ 11.4)≥ 2388 (≥ 30)287-310 (36-39)200
G45AH1300-1360(13.0-13.6)≥ 1003(≥ 12.6)≥ 2786(≥ 35)342-366 (43-46)220
G42AH1280-1340(12.8-13.4)≥ 907(≥ 11.4)≥ 2786(≥ 35)318-342 (40-43)220
G40AH1260-1310(12.6-13.1)≥ 907(≥ 11.4)≥ 2786(≥ 35)302-326 (38-41)220
G38AH1220-1250(12.2-12.5)≥ 907(≥ 11.4)≥ 2786(≥ 35)287-310 (36-39)220
G35AH1160-1230(11.6-12.3)≥ 812(≥ 10.2)≥ 2786(≥ 35)263-287 (33-36)220


Demagnetization curve of sintered neodymium iron boron

HRE免费-42SH
HRE free -42SH
N55
N55
HRE Free-48H
HRE Free-48H
42EH
42EH
42EH-2
42EH-2

Shape and coating types of sintered NdFeB magnetic steel

Shape types of sintered nd-fe-b magnets Types of sintered nd-fe-b magnet coatings
Shape TypePictureDimenionRecommend
size/mm
Maximum value
size/mm
Piece

Block Sintered Ndfeb Magnet Coating Type

L≤ 180≤ 220
W≤ 120≤ 150
T≤ 60≤ 80
Cylinder

Cylinder Sintered Ndfeb Magnet Segment

D≤ 150≤ 220
T≤ 60≤ 80
Ring

Ring Sintered Ndfeb Magnet Ring

D≤ 120≤ 160
d≤ 80≤ 100
T≤ 45≤ 65
Segmenting

Segment Sintered Ndfeb Magnet Segment

L≤ 180≤ 220
W≤ 120≤ 150
T≤ 60≤ 80
a0-180 °C

Weight limit for each item: "Recommended size" ≤ 5kg; Maximum size ≤ 10kg

The maximum size can be related to the grade of the magnet.




Phosphate
Phosphate
Epoxy
Epoxy
NICUNI
NICUNI
Zn
Zn
Bluing
Bluing
Au
Au

Product Information - Dimension and Coating

Type

Coating Type

Color

Thickness/um

SST/h

PCT/h

Salt immersion test

Working temp./℃

Metal coating

Blue Zn

Blue/White

5-10

≥48

≥48

N/A

<160

Color Zn

Multiple colors

5-10

≥72

≥72

N/A

<160

NiCuNi

Silver white

10-30

≥72

≥96

N/A

<200

Al

Silver white

5-25

≥96

≥240

N/A

<390

Organic coating

Epoxy (electro)

Black/Grey

10-30

≥480

≥96

N/A

<180

Epoxy (spray)

Black/Grey

10-30

≥480

≥96

N/A

<180

Multi-layer coating

NiCuNi+coating

Black/Grey

15-45

≥720

≥168

N/A

<180

Inorganic coating

Phosphate/ Passivated

Grey

<2

N/A

N/A

1H

<250

Bluing

Blue

<2

N/A

N/A

2H

<250


Remarks

  • The above data represent the best performance. The actual specification is to be adjusted according to variable product size and shape.

  • Muli-layer coatings is a combination of different type of coatings. It' S color, thickness and working temperature may vary from different combinations.

  • Test condition of PCT: 121°C, 100% humidity, 2 atms

  • Test condition of HAST: 132"C, 95% humidity, 2.7 atms. HAST is to evaluate the weight loss of magnet after testing, the lower the better.

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