Magneti a blocchi di ferrite per rotore

Mostly Used national standard - SJ285-77 permanent ferrite magnet standard

Grade

Value(min/typical in our factory

Br

Hcb(BHC)

Hcj(IHC)

(BH)max

MT

KG

KA/m

Koe

KA/m

KOe

Kj/m3

MGOe

Y10T(=C1)

200/218

2.00/2.18

125/145

1.57/1.82

210/250

2.64/3.14

6.5/8.0

0.8/1.0

Y25

360/370

3.60/3.70

135/150

1.70/1.88

140/170

1.76/2.14

22.5/25.3

2.8/3.2

Y30(=C5)

380/385

3.80/3.85

191/210

2.40/2.64

199/220

2.50/2.51

26.0/28

3.4/3.7

Y30BH

380/390

3.80/3.90

223/235

2.80/2.95

231/245

2.90/3.08

27.0/30.0

3.4/3.7

Y33

410/420

4.10/4.20

220/235

2.77/2.95

225/240

2.83/3.01

31.5/33.0

4.0/4.2

Y35

400/410

4.00/4.10

175/195

2.20/2.45

180/200

2.26/2.51

30.0/32.0

3.8/4.0

C8(=C8A)

385/390

3.85/3.90

235/255

2.95/3.20

242/265

3.05/3.33

27.8/30.0

3.5/3.7

C10

400/410

4.00/4.10

288/300

3.62/3.77

280/287

3.51/3.60

30.4/31.9

3.8/4.0

Chinese standard -sj/T10410 2000 permanent ferrite magnet standard

Material

Br

HcB

HcJ

(BH)max

mT

KG

KA/m

Oe

KA/m

Oe

Kj/m³

MGOe

Y8T

200~235

≥2000

125~160

≥1570

210~280

≥2610

6.5~9.5

≥0.8

Y22H

310~360

≥3100

220~250

≥2770

280~320

≥3520

20.0~24.0

≥2.5

Y25

360~400

≥3600

135~170

≥1700

140~200

≥1760

22.5~28.0

≥2.8

Y26H-1

360~390

≥3600

220~250

≥2512

225~255

≥2830

23.0~28.0

≥2.9

Y26H-2

360-380

≥3600

263-288

≥3300

318-350

≥4000

24.0-28.0

≥3.0

Y27H

370~400

≥3500

225-240

≥2830

235-260

≥2950

25.0~29.0

≥3.1

Y28

370-400

≥3700

175-210

≥2200

180-220

≥2260

26.0-30.0

≥3.3

Y28H-1

380-400

≥3800

240-260

≥3020

250-280

≥3140

27.0-30.0

≥3.1

Y28H-2

360-380

≥3600

271-295

≥3400

382-405

≥1800

26.0-30.0

≥3.3

Y30

370~400

3.7~4.0

175~210

2.20~2.64

180~220

2.26~2.77

26.0~30.0

3.3~3.8

Y30H-1

380~400

≥3800

230-275

≥2890

235-290

≥2950

27.0~32.5

≥3.4

Y30H-2

395-415

≥3950

275-300

≥3460

310-335

≥3900

27.0~32.0

≥3.4

Y32

400~420

≥4000

160~190

≥2010

165~195

≥2070

30.0~33.5

≥3.8

Y32H-1

400-420

≥4000

190-230

≥2390

230-250

≥2890

34.5-35.0

≥4.0

Y32H-2

400-440

≥4000

224-240

≥2810

230-250

≥2890

31.0-34.0

≥3.9

Y33

410~430

≥4100

220~250

≥2760

225~255

≥2830

31.5~35.0

≥4.0

Y33H

410-430

≥4100

250-270

≥3140

250-275

≥3140

31.5-35.0

≥4.0

Y34

420-440

≥4200

200-230

≥2510

205-235

≥2580

32.5-36.0

≥4.1

Y35

430-450

≥4300

215-239

≥2700

217-242

≥2730

33.1-33.2

≥4.2

Y36

440-450

≥4400

247-271

≥3100

250-374

≥4400

35.1-38.3

≥4.4

Y38

440-460

≥4400

285-305

≥3580

294-310

≥3690

36.6-40.6

≥4.6

Y40

450-460

≥4500

330-354

≥4150

340-360

≥4270

37.6-41.8

≥4.7

USA standard - permanent ferrite magnet industry standard of USA

Material

Br

HcB

HcJ

(BH)max

mT

KG

KA/m

KOe

KA/e

KOe

kj/m³

MGOe

C1

230

2.3

148

1.86

258

3.5

8.36

1.05

C5

380

3.8

191

2.4

199

2.5

27

3.4

C7

340

3.4

258

3.23

318

4.00

21.9

2.75

C8(=C8A)

385

3.85

235

2.95

242

3.05

27.8

3.5

C8B

420

4.2

232

2.913

236

2.96

32.8

4.12

C9

380

3.8

280

3.516

320

4.01

26.4

3.32

C10

400

4.0

288

3.617

280

3.51

30.4

3.82

C11

430

4.3

200

2.512

204

2.56

34.4

4.32

Japan TDK standard

Grade

Composition

Br

Hcb

Hcj

BH max

mT

kG

kA/m

kOe

kA/m

kOe

KJ/m3

MGOe

FB40

SrO6Fe2O3

410+/-10

4.1+/-10

234.8+/-11.9

2.95+/-0.15

238.7+/-15.9

3.0+/-0.2

31.4+/-1.6

3.95+/-0.2

FB3N

SrO6Fe2O3

395+/-15

3.95+/-15

234.8+/-11.9

2.95+/-0.15

238.7+/-15.9

3.0+/-0.2

28.7+/-2.4

3.6+/-0.3

FB3G

SrO6Fe2O3

375+/-15

3.75+/-15

254.6+/-15.9

3.2+/-0.2

270.6+/-19.9

3.4+/-0.25

25.9+/-2.4

3.25+/-0.3

FB3X

SrO6Fe2O3

375+/-15

3.75+/-15

234.8+/-11.9

2.95+/-0.15

238.7+/-15.9

3.0+/-0.2

25.9+/-2.4

3.25+/-0.3

FB1A

SrO6Fe2O3

220+/-15

2.20+/-15

159.2+/-15.9

2.0+/-0.2

258.6+/-19.9

3.25+/-0.25

8.9+/-1.6

1.1+/-0.2

FB5H

SrO6Fe2O3

405+/-15

4.05+/-15

298.4+/-11.9

3.75+/-0.15

322.3+/-11.9

4.05+/-0.15

31.1+/-1.6

3.9+/-0.2

FB4X

SrO6Fe2O3

420+/-10

4.20+/-10

234.8+/-11.9

2.95+/-0.15

238.7+/-15.9

3.0+/-0.2

33.4+/-1.6

4.2+/-0.2

FB4B

SrO6Fe2O3

400+/-10

4.00+/-10

254.6+/-11.9

3.2+/-0.2

262.6+/-19.9

3.3+/-0.25

30.3+/-1.6

3.8+/-0.2

FB4A

SrO/BaO6Fe2O3

410+/-10

4.10+/-10

175.1+/-15.9

2.2+/-0.2

176.7+/-15.9

2.22+/-0.2

31.8+/-1.6

4.0+/-0.2

FBGN

SrO6Fe2O3

440+/-10

4.40+/-10

258.6+/-11.9

3.25+/-0.15

262.6+/-11.9

3.3+/-0.15

36.7+/-1.6

4.6+/-0.2

FB6B

SrO6Fe2O3

420+/-10

4.20+/-10

302.4+/-11.9

3.8+/-0.15

318.3+/-11.9

4.0+/-0.15

33.4+/-1.6

4.2+/-0.2

FB6H

SrO6Fe2O3

400+/-10

4.00+/-10

302.4+/-11.9

3.8+/-0.15

358.1+/-11.9

4.5+/-0.15

30.3+/-1.6

3.8+/-0.2

FB6E

SrO6Fe2O3

380+/-10

3.80+/-10

290.5+/-11.9

3.65+/-0.15

393.9+/-11.9

4.95+/-0.15

27.5+/-1.6

3.45+/-0.2

FB5N

SrO6Fe2O3

440+/-10

4.40+/-10

256.8+/-11.9

2.85+/-0.15

2259.2+/-11.9

2.88+/-0.15

36.7+/-1.6

4.6+/-0.2

FB5B

SrO6Fe2O3

420+/-10

4.20+/-10

262.6+/-11.9

3.3+/-0.15

266.6+/-11.9

3.35+/-0.15

33.4+/-1.6

4.2+/-0.2

The standard from International Electronics Committee(IEC404-8-1)

Grade

Allowed Value (min/typical)

Br

Hcb(BHC)

Hcj(IHC)

(BH)max

MT

KG

KA/m

KOe

KA/m

KOe

Kj/m³

MGOe

HF8/22

200/220

2.00/2.20

125/140

1.57/1.76

220/230

2.76/2.89

6.5/6.8

0.8/1.1

HF20/19

320/333

3.20/3.33

170/190

2.14/2.39

190/200

2.39/2.51

20.0/21.0

2.5/2.7

HF20/28

310/325

3.10/3.25

220/230

2.76/2.89

280/290

3.52/3.64

20.0/21.0

2.5/2.7

HF22/30

350/365

3.50/3.65

255/265

3.20/3.33

290/300

3.64/3.77

22.0/23.5

2.8/3.0

HF24/16

350/365

3.50/3.65

155/175

1.95/2.20

160/180

2.01/2.26

24.0/25.5

3.0/3.2

HF24/23

350/365

3.50/3.65

220/230

2.76/2.89

230/240

2.89/3.01

24.0/25.5

3.0/3.2

HF24/35

360/370

3.60/3.70

260/270

3.27/3.39

350/360

4.40/4.52

24.0/25.5

3.0/3.2

HF26/16

370/380

3.70/3.80

155/175

1.95/2.20

160/180

2.01/2.26

26.0/27.0

3.2/3.4

HF26/18

370/380

3.70/3.80

175/190

2.20/2.39

180/190

2.26/2.39

26.0/27.0

3.3/3.4

HF26/24

370/380

3.70/3.80

230/240

2.89/3.01

240/250

3.01/3.14

26.0/27.0

3.3/3.4

HF26/26

370/380

3.70/3.80

230/240

2.89/3.01

260/270

3.27/3.39

26.0/27.0

3.3/3.4

HF26/30

385/395

3.85/3.95

260/270

3.27/3.39

300/310

3.77/3.89

26.0/27.0

3.3/3.4

HF28/26

385/395

3.85/3.95

250/265

3.14/3.33

260/275

3.27/3.45

28.0/30.0

3.5/3.8

HF28/28

385/395

3.85/3.95

260/270

3.27/3.39

280/290

3.50/3.60

28.0/30.0

3.5/3.8

HF30/26

395/405

3.95/4.05

250/260

3.14/3.33

260/270

3.27/3.39

30.0/31.5

3.8/3.9

HF32/17

410/420

4.10/4.20

160/180

2.01/2.26

165/175

2.07/2.20

32.0/33.0

4.0/4.1

HF32/22

410/420

4.10/4.20

215/225

2.70/2.83

220/230

2.76/2.89

32.0/33.0

4.0/4.1

HF32/25

410/420

4.10/4.20

240/250

3.01/3.14

250/260

3.14/3.27

32.0/33.0

4.0/4.1

Physical property of hard ferrite mangets

Parameters

Mark

Unit

Value

Recoil Permeability

Urce

-

1.05-1.3

Curie temperture

Tc

0C

460

The temperature of Br

α Br

0C-1

-0.2%

The temperature of Hcj

α Hcj

0C-1

0.2-0.5%

Density

D

g/cm3

4.5-5.1

Resistivity

P

Ω.cm

≥104

The coefficient of linear expansion

α R

0C-1

7-15x10-6

Hardness

HV

-

480-580