CONTENTS Ⅰ Permanent Magnetic Materials Ⅰ-１ １ Ⅰ- 2 Ⅰ- 3 Ⅰ- 4 Ⅰ- 5 Ⅰ- 6 Ⅰ- 7 Ⅰ-８ ８

Types of Permanent Magnets and Their Physical Characteristics HICOREX® ( Sm-Co Rare-Earth ) Magnets HICOREX®-SUPER ( Nd-Fe-BRare-Earth ) Magnets YBM ( Ferrite ) Magnets Anisotropic Ring Magnets Bonded Magnets YCM ( Cast Alnico ) Magnets YHJ ( Rolled ) Magnets

Ⅰ Permanent Magnetic Materials １ Types of Permanent Magnets and Their Physical Characteristics Ⅰ-１ Hitachi Metals, a comprehensive manufacturer of permanent magnets, offers a full line of magnetic materials from which to choose to meet particular requirements. Some permanent magnets are selected to use the energy they retain, while others are used as hysteretic materials. It is important to choose a material appropriate for its application environment and then to shape it to function properly under its operating conditions.

● Hitachi Metals Permanent Magnets Sm-Co type(1-5､2-17) … HICOREX® Nd-Fe-B type …………… HICOREX®–SUPER Ba type､Sr type ………… YBM Ferrite type ……………… KPM Nd-Fe-B type HB type … HB Alnico magnet ………… YCM Fe-Mn type,Fe-Cr-Co typeYHJ

Rare-earth magnets Ferrite magnets Bonded magnets

Permanent magnets

Cast magnets Rolled magnets

● Distribution of characteristics by magnet type 1.4

14

1.2

12

1.0

10

HICOREX-SUPER HS-47AH HS-42AH HICOREX Sm-Co type HS-35EH (2/17)

Cast magnets YCM-1B

H-23B

YCM-11

H-30SH H-30SH

H-30CH

0.8

Br(kG)

Br(T)

HICROREX

0.6

2/17type Sm-Co

H-18B H-18C (Heat-resistant) HICROREX 1/5 type Sm-Co

8 HB-10I Nd-Fe-B type bonded magnets

6 Ferrite magnets

0.4

4

0.2

2

YBM-6BE KPM-2A Ferrite type bonded magnets

2

4

6

8

10 15 iHc (kOe)

20

160

320

480

640

800 1,200 iHc (kA/m)

1,600

0

25 2,000

30 2,400

● Comparison of physical characteristics of various magnetic materials

Alnico magnet

Temperature coefficient △Br/Br %/℃ -0.02

7.3

60∼75

-

-

Sr-Fe magnet

-0.2

5.0

>1010

-

50

Sm-Co (1-5 type) Sm-Co (2-17 type) R-Co (2-17 type)

-0.04 -0.035 -0.05

8.3 8.5 8.3

50 80 -

600 600 670

150 150 150

Nd-Fe-B

-0.13

7.5

150

600

250

Magnetic material

Rareearth magnet

Density

Electical resistance

Vickers hardness

Bending strength

Thermal expansion

Curie point

g/㎝3

μΩ･㎝

Hv

N/㎜2

10-6/℃

℃

11 〃14∼15 ⊥ 9∼10 6.6 8.0 〃 4.7∼5.4 ⊥-1.1∼-2.0

850

-1-

450 710 770 740 310

MM001A

High Performance Nd-Fe-B Sintered Magnet by Hitachi Low Oxygen Process (HILOP) Applications ① ② ③ ④ ⑤

Parts for automobile ，EV Servo motor for machinery ，elevator Pick up actuator for CD , DVD Linear motor for semi-conductor production equipment Sensor and others

Features ① Reduction of product size and weight due to high performance magnetic characteristics ② Superior mechanical strength and corrosion resistance

Magnetic Characteristics Hitachi code

Br

iHc

(BH)max

kG

T

kOe

kA/m

MGOe

HS-50AH

14.2

1.42

15

1190

48

kJ/m 382

HS-46CH

13.9

1.39

18

1430

46

366

HS-43DH

13.2

1.32

22

1750

41

326

HS-38EH

12.4

1.24

26

2070

37

295

HS-34FH

11.8

1.18

30

2390

33

262

HS-32GH

11.4

1.14

35

2785

31

246

800

1200

1600

iHc

(kA/m) 2000 2400 00 00

3

2800 00 1.4 Br(T)

14 Br(kG)

HILOP 1.2

12

Conventional 1.0

10 10

15

20 iHc

25 (kOe)

30

35

40 Hitachi Metals , Ltd.

MM002A

High Performance Anisotropic Nd-Fe-B Sintered Ring Magnet Contribution to the Improvement of Brush-less Motor's Function Radial anisotropic Multi- pole oriented

Applications

8

8

Bo （kG）

Spindle motor for HDD,FDD Servo motor for robot ,machinery Power steering motor for automobile ,EV Actuators

Bo （kG）

① ② ③ ④

4 0

-4

0

-4

-8

Features

4

-8

0

30

60

90

Angle（DEG.）

0

30

60

90

Angle（DEG.）

① Free multiple magnetization ,skew type magnetization ( Radial anisotropic magnet ) ② Sinely curved distribution of surface flux density ( Multi-pole oriented magnet ) ③ Reduction of motor assembling cost

Magnetic Characteristics Radial anisotropic ring magnet

Sizes

Hitachi code HS-40AR HS-38AR HS-38CR HS-35CR HS-35DR HS-33DR HS-30BR HS-30CR HS-30ER

Br kG 12.9 12.2 12.5 11.9 11.9 11.3 11.6 11.2 10.6

iHc T 1.29 1.22 1.25 1.19 1.19 1.13 1.16 1.12 1.06

Outer dia(Do) (mm) Ratio(Di/Do) (Do -Di)/2 (mm) Axial length (mm) Number of ｐｏｌｅｓ

kOe 15 15 18 18 23 23 15 18 28

kA/m 1190 1190 1430 1430 1830 1830 1190 1430 2220

(BH)max. MGOe kJ/m3 40 318 36 286 37 295 34 270 34 270 31 246 32 255 30 239 27 215

Radial anisotropic

Multi-pole oriented

φ15～150 0.75～0.95 1.5～5 ～40

φ5～80 0.4～0.85 1.5～10 ～40 2～24

Arbitrary

Hitachi Metals , Ltd.

MM003A

Ｒ

Sm-Co Magnet（ HICOREX ） Rare Earth Magnet with Superior Thermal Stability

Applications ① Motor ② Magnetic circuit for sputtering equipment ③ Sensor and others

Features ① Smaller temperature coefficient of induction and coercive force Temp. coefficient of Br ： −0.035 % / ℃ Temp. coefficient of iHc： −0.23 % / ℃ ② Superior thermal stability Curie point : over 700℃ ③ Available without surface treatment （ Better corrosion resistance compare with Nd-Fe-B magnet）

Magnetic Characteristics ｉHc

Br

Hitachi code

(BH)max. 3

kG

T

kOe

kA/m

MGOe

kJ/m

H-22A

8.5∼9.5

0.85∼0.95

15min.

1193min.

18∼22

143∼176

H-30CH

10.4∼11.4

1.04∼1.14

8.5min.

676min.

25∼31

198∼247

Sm2Co17 H-26SV (2-17)

10.2∼11.2

1.02∼1.12

20min.

1591min.

24∼29

190∼231

H-30SH

10.4∼11.4

1.04∼1.14

20min.

1591min.

25∼31

198∼247

SmCo5 (1-5)

Hitachi Metals , Ltd.

MM004A

Sm-Fe-N Bonded Magnet

ＮＥＷ

Compression Moulded Magnet Applications ① Precision motor、Speaker、Buzzer ② Sensor and others

Features ① Fundamental patents of Hitachi Metals ② Comparison with Ｎｄ−Ｆｅ−Ｂ bonded magnet （１）Larger intrinsic coercive force （２）Smaller temperature coefficient of induction （３）Superior thermal stability （４）Better mechanical strength , size accuracy （５）Superior corrosion resistance

Magnetic Characteristics ① Magnetic properties

② Physical properties

Br

(kG/T)

5.6 / 0.56

Hc

(kOe/ kA/m)

4.9 / 390

iHc

(kOe/kA/m)

10.7 / 852

(BH)max (MGOe/ kJ/m3)

Density (g/cm3) Ring crushing strength (N/mm2) Hardness (Rockwell) Curie point (℃)

7.2 / 57

Temp. coefficient of Br(%/℃)

-0.07

Temp. coefficient of iHc (%/℃)

-0.42

5.8 90 70 498

③ Thermal stabilities Irreversible flux loss after 100℃ heated (%) Mass change after corrosion test (%) Irreversible flux loss after 60℃ heated (%)

-2.3

500Hrs, Pc=2

+0.23

PCT 100℃ x 24Hrs､Pc=2

-0.1

60℃ x 95 % RH x 500Hrs､Pc=2

Hitachi Metals , Ltd.

MM005A

La ,Co Substituted Strontium Ferrite Magnet ＮＥＷ

ＹＢＭ-９Ｂ ＹＢＭ ９Ｂ Series

Applications ① Starter、power steering ,ABS for auto mobile ② Air conditioner , refrigerator compressor motor , washing machine for home appliances

Features ① Excellent high Br ,high iHc ② Smaller ( 60∼70 % ) temperature coefficient of iHc compare with conventional materials ③ Reduction of magnet volume

Magnetic Characteristics Residual induction ( Br )

Hitachi code

ＣＧＳ (Ｇ)

Intrinsic coercive force ( iHc )

ＳＩ(ｍＴ)

ＣＧＳ (Ｏｅ)）

ＳＩ(ｋＡ／ｍ)

ＹＢＭ−９ＢＤ ４，４００∼４，６００ ４４０∼４６０

３，２００∼３，８００

２５４∼３０３

ＹＢＭ−９ＢＥ ４，３００∼４，５００ ４３０∼４５０

４，３００∼４，７００

３４２∼３７４

ＹＢＭ−９ＢＦ ４，２００∼４，４００ ４２０∼４４０

４，８００∼５，２００

３８１∼４１４

460

ＹＢＭ−９Ｂ Ｓｅｒｉｅｓ

450 440

７ＢＢ ９ＢＤ ７ＢＤ ５ＢＢ ６ＢＢ ６ＢＤ 2Ｂ ５ＢＤ

430 420 410 400

９ＢＥ

380

９ＢＦ

７ＢＥ ７ＢＦ ６ＢＥ

５ＢＥ

390

Thermal coefficient β（％／Ｋ）

 Induction （mT）

( x10G )

470

６ＢＦ ５ＢＦ

370 360 350 340 330 150

200

250

300

350

400

 ｉＨｃ （ｋＡ／ｍ） （ｘ４π Ｏｅ）

450

0.6

ＹＢＭ−５Ｂ、６Ｂ Series Sr Ferrite Magnet

0.5 0.4 0.3 0.2 0.1

ＹＢＭ−９Ｂ Series La-Co Substituted Magnet

0.0 0 80 160 240 320 400 　ｉＨｃ　（ｋＡ／ｍ）　　（ｘ４π　Ｏｅ）

480

560

Hitachi Metals , Ltd.

MM006A

Wide Angled Arc Segment Ferrite Magnet Superior Magnet for Low Noise Motor Applications ① Wiper motor for automobile ② Throttle valve control motor ③ ABS motor

Features ① Effective noise reduction with low cogging torque ② Reduction of product size and weight because of high performance magnetic characteristics

Magnetic Characteristics

A. conventional （Y BM-5B E)

B. radial ring

C. wide angle (180°)

（YBM -4B)

（YBM-5BE)

Relation between magnetic flux and length 0.70

Ｃ . wide angle (180°) 0.65

Φｇ B.radial ring

0.60 0.59

0.55

（ｍＷｂ）

Comparison in the same magnetic flux magnet mass noise magnet ratio (%) reduction Ａ． 100 × Ｂ． 147 ○ Ｃ． 106 ○

5

A. conventional (130°)

（x10 Mx）

performance ○ × ○

0.50 187

135

124

magnet mass W (gr/set)

0.45 34

36

38

40

42

44

46

magnet length Ｌ（mm）

Hitachi Metals , Ltd.

MM007A

Two Poles Ferrite Ring Magnet Cylindrical Magnet for Small Motor Applications ① Rotor for pumping motor （Discharge 、aqua 、dish washer 、water circulation etc ）

Features ① Cylindrical magnet with small dia. To large dia. （ φ８ ∼ φ３３ mm） ② Larger axial length （ ∼ Ｌ７０ ｍｍ ）

Sizes （unit：ｍｍ）

Outer dia.

Inner dia.

Axial length

φ ８∼φ１４

φ ３∼φ ５

≦ ４０

φ１５∼φ２１

φ ５∼φ ７

≦ ５０

φ２２∼φ２８

φ ７∼φ１０

≦ ６０

φ２９∼φ３３

φ１０∼φ１４

≦ ７０

Two poles ferrite ring magnet

Hitachi Metals , Ltd.

Magnetic Materials Div.

  ®

Ⅰ- 2 HICOREX (Sm-Co Rare-Earth) Magnets ● Magnetic characteristics of HICOREX Sm-Co (1-5 type ､ 2-17 type)

2.0

3.0

2.5

4.0

12 10

800

0.8

8 6

7

1.0

H-23CV H-20SV H-22A H-18B

0.5

10

1.2

H-30CH

9

8

6

5

4

700

600 500 400 300 200 100 DEMAGNETIZING FORCE -H(kA/m)

3 2 -H(kOe)

1

INDUCTION B (T)

PERMEANCE COEFFICIENT 1.5 P=B/H 1.0

B(kG)

ICOREX is a rare-earth magnet which is relatively stable amid changes in temperature. Its high energy product and excellent coercive force make it possible to design compact, efficient machines and components. As HICOREX is manufactured by powder metallurgy, careful consideration should be given to its shape and properties.

0.6

4

0.4

2

0.2 0

0 0 0

R-Co (2-17 type) 2.5

3.0 4.0

12

2.0

10

1.0

8

0.8

0.5

Ⅰ- 3 HICOREX®-SUPER (Nd-Fe-BRare-Earth) Magnets

10 800

9 700

8

7

6

5

3 2 4 -H(kOe)

1

600 500 400 300 200 100 DEMAGNETIZING FORCE -H(kA/m)

4

0.4

2

0.2

0 0

0

0

● Magnetic characteristics of HICOREX-SUPER

PERMEANCE COEFFICIENT P=B/H

2

2.5

5

3

8

8

7

6

5

4 3 2 1 -H(kOe) 900 800 700 600 500 400 300 200 100 DEMAGNETIZING FORCE -H(Ka/m)

1.4

HS-35BH

HS-30CH HS-27CV

0.5

9

HS-47AH

12 1.2 HS-30BV 10

1.5

1

12 11 10

14

1.0 0.8

6

0.6

4

0.4

2

0.2

0

0

0 0

INDUCTION B (T)

4

-2-

0.6

B(kG)

Hitachi Metals HICOREX-SUPER magnets are highperformance Nd-Fe-B rare-earth magnets with magnetic characteristics superior to those of Sm-Co HICOREX magnets. They are easy to use and contribute significantly to the reduction of product weight and size. The magnetic flux variation of Nd-Fe-B rare-earth magnets in the service temperature environment is smaller than that of ferrite magnets but larger than that of Sm-Co magnets. Also, they suffer heavy demagnetization, especially at high temperatures. For these reasons, it is important to select a magnetic material with properties suited to meet the specific service conditions.

B(kG)

H-23EH H-23EV H-21EV

6

Magnetic Materials Div.

1.2

H-25EH

INDUCTION B (T)

PERMEANCE COEFFICIENT 1.5 P=B/H 1.0

Magnetic Materials Div.

Ⅰ- 4 YBM (Ferrite) Magnets Ferrite magnets are made from oxide materials by powder metallurgy. These magnets feature a high coercive force despite their somewhat low residual magnetic flux density. This quality, together with their low recoil permeability, means they are not affected easily by the presence of demagnetizing fields. in addition, their low specific gravity contributes to reducing product weight. Notes: 1. As these magnets are made by powder metallurgy, careful consideration should be given to shape to make economical use of them. Magnetic characteristics are sensitive to temperature changes. This should be fully considered regarding the intended application.

● Positioning of Hitachi Metals ferrite magnets

0.44

4.4

0.42

4.2

0.40

Br(kG)

RESIDUAL FLUX DENSITY Br (T)

Hitachi Metals offers ferrite magnets with a broad range of magnetic characteristics. Especially at the high end of the performance spectrum, a number of series are available to meet specific needs. Based on the iHc and Br characteristics, they are correlated as shown below. Ferrite magnets may be customized upon request, within the indicated range of iHc and Br characteristics. Your inquiries are welcome. YBM-6BB

YBM-6BE

YBM-2BB 4.0

YBM-5BD

3.8

0.36

3.6

YBM-6BF

YBM-5BE

YBM-1B

YBM-2B YBM-2BD

YBM-1BB 0.38

YBM-6BD

YBM-5BB

YBM-2BA

YBM-5BF

YBM-2BE

YBM-2BC

YBM-2BF

YBM-2C 0.34

3.4

0.32

3.2 1.5

2

2.5

3

3.5

4 lHc

100

150

200

250

300

4.5

5.5

(kOe) 350

DEMAGNETIZING FORCE lHc (kA/m)

-3-

5

400

450

Ⅰ- 5 Anisotropic Ring Magnets Anisotropic ring versions of ferrite and Nd-Fe-B rare-earth magnets are available. They will contribute notably to motor downsizing, weight reduction and performance enhancement. They are the optimum choice for use in various types of actuators and high-performance control motors.

● Materials for anisotropic ring magnets Ferrite magnets Nd-Fe-B magnets Isotropic

YBM-3

Radial anisotropic

YBM-4A YBM-4B

HS-30BR HS-30CR

Polar anisotropic

YBM-4E YBM-4F

HS-30BM HS-30CM

● Magnetic characteristics ( typical values ) Hitachi code YBM-4A YBM-4B YBM-4E YBM-4F HS-30BR HS-30CR HS-30BM HS-30CM

Unit CGS SI CGS SI CGS SI CGS SI CGS SI CGS SI CGS SI CGS SI

Br(G) ［mT］ 2600 260 3000 300 3400 340 3400 340 11600 1160 11200 1120 11600 1160 11200 1120

Hc(Oe) ［KA/m］ 2000 160 2400 190 2400 190 2400 190 11000 880 10700 850 11000 880 10700 850

-4-

iHc(Oe) ［KA/m］ 3000 240 3000 240 3200 255 3200 255 15000 1190 19000 1510 15000 1190 19000 1510

(BH)max(MGOe) 3

［KJ/m ］ 1.4 1.1 1.9 15 2.4 19 2.4 19 32 255 30 239 32 255 30 239

Material Ferrite radial dry molding Ferrite radial dry molding Ferrite polar anisotropic wet molding Ferrite polar anisotropic wet molding Nd-Fe-B radial Nd-Fe-B radial Nd-Fe-B-radial anisotropic Nd-Fe-B-radial anisotropic

Magnetic Materials Div.

Ⅰ- 6 Bonded Magnets A Ferrite bonded magnets Ferrite bonded magnets are made by forming ferrite magnet powder mixed with plastic materials. Nylon resins are used for injection molding, so the magnets are thin and finished to a high standard of dimensional accuracy. They can be formed in intricate shapes. ● Standard rating characteristics Hitachi code KPM-3 KPM-2A

Residual flux density Br kG T 1.2∼1.6 0.12∼0.16 2.4∼2.8 0.24∼0.28

Coercive force BHC

kOe 1.0∼1.4 1.9∼2.4

Maximum energy product (BH)max. kA/m MG･Oe kJ/m3 190.9∼278.6 0.3∼0.5 2.3∼4.0 198.9∼254.7 1.2∼1.7 9.5∼13.6

IHC

kA/m 79.5∼111.5 151.0∼191.0

kOe 2.4∼3.5 2.5∼3.2

B Nd-Fe-B bonded magnets Nd-Fe-B rare-earth magnet powder is mixed with epoxy resins and formed. As their energy product is greater than that of ferrite bonded magnets, these magnets are useful in downsizing products. Bonded magnet materials Ferrite type Isotropic

KPM-3

Radial anisotropic

KPM-2A

Polar anisotropic

KPM-2A

Nd-Fe-B type HB-06I HB-08I HB-10I

● Standard rating characteristics of Nd-Fe-B bonded magnets Hitachi code HB-06I HB-08I HB-10I HB-11I HB-12I HR-08I

Residual flux density Br kG T 5.7 0.57 6.6 0.66 7.1 0.71 7.1 0.71 7.5 0.75 6.2 0.62

Coercive force BH C

kOe 4.6 5.2 5.2 5.8 5.8 5.2

IHC

kA/m 366 413 413 462 462 413

-5-

kOe 9.0 9.0 9.2 9.7 9.7 12.5

kA/m 716 716 756 772 772 995

Maximum energy product (BH)max. MG･Oe kJ/m 3 6.4 51 8.5 67 10 79 11 88 12 96 8 64

Magnetic Materials Div.

Ⅰ- 7 YCM(Cast Alnico)Magnets YCM magnets have a high magnetic flux density and can be used in a very stable state over a wide range of temperature changes. In particular, the YCM-8 type, with a high coercive force, and the YCM-9 and YCM -11 types, with large energy products, contribute to the further sophistication of magnetic circuits. ●Featuring high hardness, these magnets are finished primarily by grinding. ●While their temperature coefficients are low, they can be used at relatively high temperatures without a large irreversible loss of magnetism. Magnetic circuits can be designed that make the most of magnetic materials. The especially high energy materials used will realize very compact magnetic circuits. ●Magnet characteristics can be effectively used through magnetization after mounting in magnetic circuits. ● Typical magnetic characteristics

PERMEANCE COEFFICIENT P=B/H 10

14 13 12 11

20 22.5 25 30 40 50 70 17.5 ENERGY PRODUCT(BH)(MG･ Oe) 15 10 8 6 4 2 14

1.4

12

1.2

10

1.0

HI-MAG

9 YCM-1B

8

YCM-9B

5

YCM-2B 8

4 3

0.8

6

0.6

4

0.4

2

0.2

YCM-4D 2 YCM-8C

YCM-8E

YCM-4B

1

2,000 1,800 160

1,600 1,400

140

INDUCTION B(T)

YCM-11

B(kG)

7 6

120

1,200 1,000 100

80

800 60

600 -H(Oe) 40

400

200 20

0

0

0

DEMAGNETIZING FORCE -H(kA/m)

● Temperature coefficient table    Hitachi code YCM-1B YCM-2B YCM-8B YCM-9B YCM-11

Temperature coefficient(%/℃) -0.016∼-0.022 -0.02∼-0.03 -0.005∼-0.01 -0.01∼-0.02

● Physical properties Curie temperature ℃ Maximum temperature permissible   ℃ Specific resistance      μΩ･㎝ Density    g/㎝3   Hardness HRc -6 Thermal expansion coefficient  α×10 /℃

-6-

850∼890 550 50∼75 ≒7.3 45∼60 11∼13.5

Specialty Steel Div.

● Physical properties of YHJ (rolled) magnets

８YHJ (Rolled) Magnets Ⅰ-８ These magnets can be formed into wire rod. sheet and other shapes difficult for conventional magnets. They are easy to punch, draw curl, and so on… and are classified as semi-hard Fe Mn magnets and permanent Fe-Cr-Co magnets. The former are mainly used as hysteretic materials and the latter in measuring instruments.

Material Fe-Mn type  Item Curie temperature      ℃ 635∼665 Resistivity cm μΩ･㎝   70∼80 270∼480 Vickers Before heat treatmen hardness After heat treatment 580∼600 7.7∼7.8 Density g/㎝    Temperature coefficient %/℃ -0.02

YHJ-30-10(Anisotropic)

13

1.3

12

1.2

10

1.0

8 YHJ-32-14(Isotropic)

B(kG)

YHJ-3A 0.8

600

400

500

YHJ-5 YHJ-2

YHJ-25-8 (Isotropic)

YHJ-30-10(Isotropic)

YHJ-3B

300

200 -H(Oe)

100

30 20 10 40 DEMAGNETIZING FORCE -H(kA/m)

50

6

0.6

4

0.4

2

0.2

0

0

INDUCTION B(T)

● Magnetic characteristics of YHJ (rolled) magnets

0

● Standard rating characteristics Residual flux density Br kG T

Oe

kA/m

YHJ-2

6.0∼12.5 0.60∼1.25

50∼150

3.9∼12.0

YHJ-3A

8.0∼11.5 0.80∼1.15 140∼170 11.1∼13.6

YHJ-5

8.0∼10.0 0.80∼1.00 100∼140

YHJ-3B

8.0∼9.0

0.80∼0.90 130∼160 10.3∼12.8

YHJ-25-8

8.5∼9.5

0.85∼0.95 280∼340 22.2∼27.1

YHJ-30-10

8.0∼10.0 0.80∼1.00 350∼460 27.9∼36.7

Anisotropic YHJ-30-10

11.5∼12.5 1.15∼1.25 500∼650 39.7∼51.8

Material

Fe-Mn

Working hardening type Age hardening type Isotropic

Fe-Cr-Co Isotrpic

Hitachi code

YHJ-32-14

Coercive force BHc

7.9∼11.2

7.0∼10.0 0.70∼1.00 400∼660 31.9∼52.6 -7-

Fe-Cr-Co type 650 70∼80 230 300∼400 7.6 -0.01∼-0.03