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Manufacturing process of sintered NdFeB magnetic steel

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.