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铁氧体参数及国内外牌号对照表

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HARD FERRITE MAGNETS Hard ferrite (ceramic) magnets were developed in the 1960's as a low cost alternative to metallic magnets. Even though they exhibit low energy (compared with other permanent magnet materials) and are relatively brittle and hard, ferrite magnets have won wide acceptance due to their good resistance to demagnetization, excellent corrosion resistance and low price per pound. In fact, measured by weight, ferrite represents more than 75 percent of the world magnet consumption. It is the first choice for most types of DC motors, magnetic separators, magnetic resonance imaging and automotive sensors.

Ferrite Magnets characteristics
Mostly Used national standard - SJ285-77 permanent ferrite magnet standard
Value(min/typical in our factory) Grade MT Y10T(=C1) Y25 Y30(=C5) Y30BH Y33 Y35 C8(=C8A) C10 200/218 360/370 380/385 380/390 410/420 400/410 385/390 400/410 Br KG 2.00/2.18 3.60/3.70 3.80/3.85 3.80/3.90 4.10/4.20 4.00/4.10 3.85/3.90 4.00/4.10 Hcb(BHC) KA/m 125/145 135/150 191/210 223/235 220/235 175/195 235/255 288/300 Koe 1.57/1.82 1.70/1.88 2.40/2.64 2.80/2.95 2.77/2.95 2.20/2.45 2.95/3.20 3.62/3.77 Hcj(IHC) KA/m 210/250 140/170 199/220 231/245 225/240 180/200 242/265 280/287 KOe 2.64/3.14 1.76/2.14 2.50/2.51 2.90/3.08 2.83/3.01 2.26/2.51 3.05/3.33 3.51/3.60 (BH)max Kj/m^3 6.5/8.0 22.5/25.3 26.0/28 27.0/30.0 31.5/33.0 30.0/32.0 27.8/30.0 30.4/31.9 MGOe 0.8/1.0 2.8/3.2 3.4/3.7 3.4/3.7 4.0/4.2 3.8/4.0 3.5/3.7 3.8/4.0

Chinese SJ/T0410-2000 Permanent Ferrite Manget Standard BR Grade mT KG KA/m Koe 1.57~2.01 1.70~2.38 2.77~3.14 2.14~2.38 1.70~2.14 2.77~3.14 2.58~3.14 KA/m 210~280 140~195 280~320 190~230 140~200 225~255 210~255 180~220 235~290 310~335 165~195 225~255 217~241 Koe 2.64~3.52 1.76~2.45 3.52~4.02 2.39~2.89 1.76~2.51 2.83~3.21 2.64~3.21 2.26~2.77 2.95~3.65 3.90~4.21 2.07~2.45 2.83~3.21 2.73~3.03 Kj/m 6.5~9.5 18.0~22.0 20.0~24.0 20.0~25.5 22.5~28.0 23.0~28.0 25.0~29.0 26.0~30.0 27.0~32.0 28.5~32.5 30.0~33.5 31.5~35.0 33.1~33.2 MGOe 0.8~1.2 2.3~2.8 2.5~3.0 2.5~3.2 2.8~3.5 2.9~3.5 3.1~3.7 3.3~3.8 3.4~4.1 3.5~4.0 3.8~4.2 4.0~4.4 4.16~4.17 Y8T 200~235 2.0~2.35 125~160 Y20 320~380 3.2~3.8 Y22H 310~360 3.1~3.6 Y23 320~370 3.2~3.7 Y25 360~400 3.6~4.0 Y26H 360~390 3.6~3.9 Y27H 370~400 3.7~4.0 135~190 220~250 170~190 135~170 220~250 205~250 HcB HcJ (BH)max

Y28 370~400 3.7~4.0 175~2102 2.20~2.64 Y30H-1 380~400 3.8~4.0 230~275 2.89~3.46 3.46~3.77 2.01~2.38 2.77~3.14 2.70~3.00

Y30H-2 395~415 3.95~4.15 275~300 Y32 400~420 4.0~4.2 Y33 410~430 4.1~4.3 Y35 430~450 4.3~4.5 160~190 220~250 215~239

In MMPA(0100-87) standard

Grade
C1 C5 C7 C8A C8B C9 C10 C11

BR mT
230 380 340 385 420 380 400 430

HcB KG
2.3 3.8 3.4 3.85 4.2 3.8 4.0 4.3

HcJ Koe
1.84 2.4 3.23 2.95 2.913 3.516 3.617 2.512

(BH)max Koe
3.5 2.5 4.00 3.05 2.96 4.01 3.51 2.56

KA/m
148 191 258 235 232 280 288 200

KA/m
258 199 318 242 236 320 280 204

Kj/m
8.36 27 21.9 27.8 32.8 26.4 30.4 34.4

MGOe
1.05 3.4 2.75 3.5 4.12 3.32 3.82 4.32

Ring shape size(mm) D×d×H

Ф60×33×3~20 Ф60×40×3~20 Ф60×43×3~20 Ф61×24×3~15 Ф61×32×3~15 Ф63×42×3~20 Ф65×24×3~21 Ф65×25×3~21 Ф65×32×3~21 Ф68×32×3~15 Ф75×32×3~23 Ф110×51×5~21 Ф110×57×5~21 Ф110×60×5~21 Ф110×51×5~21 Ф110×57×5~21 Ф110×60×5~21 Ф115×43×5~23

Ф102×51×5~23 Ф102×57×5~23 Ф102×60×5~23 Ф102×75×5~23 Ф109×45×5~28 Ф109×60×5~28 Ф110×38×5~21 Ф110×43×5~21 Ф110×45×5~21 Ф110×5×5~21 (withФ12.7×2hole) Ф75×40×3~23 Ф193×86/89×5~27 Ф193×110×5~27 Ф193×122×5~27 Ф193×86/89×5~27 Ф193×110×5~27 Ф193×122×5~27 Ф200×83×5~27

Ф169×86×5~29 Ф181×56×5~29 Ф181×57×5~29 Ф181×73×5~29 Ф181×83.5×5~29 Ф181×86/90×5~29 Ф181×95×5~29 Ф193×80×5~29 Ф193×83.5×5~29 Ф68×40×3~15 Ф30×12.5×3~20 Ф68×42×3~15 Ф70×16×3~17 Ф70×20×3~17 Ф68×42×3~15 Ф70×16×3~17 Ф70×20×3~17 Ф70×30.5×3~17

Ф115×45×5~23 Ф115×43×5~23 Ф115×45×5~23 Ф115×57×5~23 Ф115×58.7×3~23 (elliptical) Ф115×60×5~23 Ф115×67×5~23 Ф115×80×5~23 Ф121×45×5~24 Ф121×57×5~24 Ф121×60×5~24 Ф121×65×5~24

Ф200×86×5~27 Ф200×83×5~27 Ф200×86×5~27 Ф200×95×5~27 Ф200×100×5~27 Ф200×110×5~27 Ф200×120×5~27 Ф206×88.9×5~30 Ф206×89×5~30 Ф206×118×5~30 Ф210×86×5~30 Ф210×118×5~30

Ф70×32×3~17 Ф70×30.5×3~17 Ф70×32×3~17 Ф70×56×3~17 Ф70×40×3~17 Ф71×40×3~17 Ф71×30.5×3~17 Ф71×32×3~17 Ф72×30.5×3~16 Ф72×32×3~16 Ф72×38×3~16 Ф72×40×3~16

NdFeB
Known as third generation of Rare Earth magnets, Neodymium Iron Boron (NdFeB) magnets are the most powerful and advanced commercialized permanent magnet today. Since they are made from Neodymium, one of the most plentiful rare earth elements, and inexpensive iron, NdFeB magnets offer the best value in cost and performance. NdFeB magnets are available in both sintered and bonded forms. Sintered NdFeB offers the highest magnetic properties (28 MGOe to 50 MGOe) while Bonded NdFeB offers lower energy properties. Although bonded magnets do not possess magnetic properties as advanced as those of sintered magnets, they can be made in shapes and sizes that are difficult to achieve with sintering. A variety of coatings can be applied to the magnets' surface to overcome the principle drawback of neodymium-based magnets, their tendency to corrode easily.

Max. Energy Product Grade (BH)max MGOe kJ/m3
N33 31-33

Remanence Br kG mT

Coercive Force Hc Hci

Rev. Temp. Coeff.

Curie Temp.

Working Temp. Tw °C
80

Bd

Hd

Tc

kOe kA/m kOe kA/m %/°C %/°C °C
>836 >12 >955 -0.12 -0.60 310

247-263 11.30-11.70 1130-1170 >10.5

N35

33-36

263-287 11.70-12.10 1170-1210 >10.9

>868

>12

>955

-0.12

-0.60

310

80

N38

36-39

287-310 12.10-12.50 1210-1250 >11.3

>899

>12

>955

-0.12

-0.60

310

80

N40

38-41

302-326 12.50-12.80 1250-1280 >11.6

>923

>12

>955

-0.12

-0.60

310

80

N42

40-43

318-342 12.80-1320 1280-1320 >11.6

>923

>12

>955

-0.12

-0.60

310

80

N45

43-46

342-366 13.20-13.80 1320-1380 >11.0

>876

>12

>955

-0.12

-0.60

310

80

N48

46-49

366-390 13.80-14.20 1380-1420 >10.5

>835

>11

>876

-0.12

-0.60

310

80

N30M

28-32

223-255 10.90-11.70 1090-1170 >10.2

>812

>14

>1114

-0.12

-0.59

320

100

N33M

31-35

247-279 11.40-12.20 1140-1220 >10.7

>851

>14

>1114

-0.12

-0.59

320

100

N35M

33-37

263-294 11.80-12.50 1180-1250 >11.0

>875

>14

>1114

-0.12

-0.59

320

100

N38M

36-40

286-318 12.30-13.00 1230-1300 >11.5

>915

>14

>1114

-0.12

-0.59

320

100

N40M

38-42

302-334 12.60-13.20 1260-1320 >11.8

>939

>14

>1114

-0.12

-0.59

320

100

N42M

40-44

318-350 13.00-13.50 1300-1350 >12.0

>955

>14

>1114

-0.12

-0.59

320

100

N45M

42-46

334-366 13.20-13.80 1320-1380 >12.2

>971

>14

>1114

-0.12

-0.59

320

100

N33H

31-34

247-271 11.30-11.70 1130-1170 >10.5

>836

>17

>1353

-0.11

-0.58

320-350

120

N35H

33-36

263-287 11.70-12.10 1170-1210 >10.9

>868

>17

>1353

-0.11

-0.58

320-350

120

N38H

36-39

287-310 12.10-12.50 1210-1250 >11.3

>899

>17

>1353

-0.11

-0.58

320-350

120

N40H

38-41

302-326 12.40-12.80 1240-1280 >11.6

>923

>17

>1353

-0.11

-0.58

320-350

120

N42H

40-43

318-342 12.80-13.20 1280-1320 >12.0

>955

>17

>1360

-0.11

-0.58

320-350

120

N33SH

31-34

247-272 11.30-11.70 1130-1170 >10.6

>844

>20

>1592

-0.11

-0.55

340-360

150

N35SH

33-36

263-287 11.70-12.10 1170-1210 >11.0

>876

>20

>1592

-0.11

-0.55

340-360

150

N38SH

36-39

287-310 12.10-12.50 1210-1250 >11.4

>907

>20

>1592

-0.11

-0.55

340-360

150

N40SH

38-41

302-326 12.10-12.80 1240-1280 >11.8

>939

>20

>1592

-0.11

-0.55

340-360

150

N28UH

26-29

207-231 10.20-10.80 1020-1080 >9.6

>768

>25

>1990

-0.11

-0.51

350-380

180

N30UH

28-31

223-247 10.80-11.30 1080-1130 >10.2

>816

>25

>1990

-0.11

-0.51

350-380

180

N33UH

31-34

247-271 11.30-11.70 1130-1170 >10.7

>856

>25

>1990

-0.11

-0.51

350-380

180

N28EH

26-29

211-236 10.40-10.90 1040-1090 >9.8

>784

>30

>2388

-0.11

-0.51

350-380

200

N30EH

28-31

223-247 10.80-11.30 1080-1130 >10.2

>812

>30

>2388

-0.11

-0.51

350-380

200

1.Licensed Products by SSMC-MQ - ISO 9002 Quality Standard Certified 2.The above-mentioned data of magnetic parameters and physical properties are given at room temperature. 3.The maximum service temperature of magnet is changeable due to the ratio length and diameter and enviromental factors. 4. Special properties can be achieved with custom method.

Physical and Mechanical Properties
Thermal Conductivity Young’s Modulus Bending Strength Compressive Strength Electrical Resistivity Density Vickers Hardness 7.7 kcal/m-h-°C 1.7 x 104 kg/mm 24 kg/mm 80 kg/mm
2 2 2 2

160 -ohm-cm/cm 7.4-7.55 g/cm 500 - 600
3

Max Working Temperature

Temperature Color key Max Working Temp 80℃=176°F 100℃=212°F 120℃=248°F 150℃=302°F 180℃=356°F 200℃=392°F

Available Coatings: Thickness Su rface Coating (Microns) Color Resistance

Passivation Ni+Ni Nickel Ni+Cu+Ni Zn Zinc C-Zn Tin Gold Copper Ni+Cu+Sn Ni+Cu+Au Ni+Cu Epoxy

1

Silver Grey

Temporary Protection

10-20

Bright Silver Bright Blue

Excellent against Humidity Good Against Salt Spray Excellent Against Salt Spray Superior Against Humidity Superior Against Humidity Temporary Protection

8-20 Shinny Color 15-20 10-20 10-20 Silver Gold Gold

Excellent Against Humidity Epoxy Ni+Cu+Epoxy Zn+Epoxy Chemical Ni 10-20 Silver Grey Excellent Against Humidity Excellent Against Humidity, Salt Spray. Superior Against Solvents, Gases, Fungi Parylene Parylene 5-20 Grey and Bacteria. FDA Approved. 15-25 Black, Red, Grey & Salt Spray




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