Electrical Steel

Electrical Steel, Non-oriented Electrical Steel

Electrical Steel

Electrical Steel, Non-oriented Electrical Steel
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Electrical Steel

Electrical Steel

General series:  0.30mm、0.35mm、0.50mm、0.65mm


High efficient series: 0.35mm、0.50mm


Stress relief annealing series: 0.35mm、0.50mm


New energy vehicle series: 0.20mm、0.25mm、0.27mm、0.30mm


General series:  0.30mm、0.35mm、0.50mm、0.65mm

Motor Company general requirements


High efficient series: 0.35mm、0.50mm

High efficient motor, high efficient compressor motor, frequency conversion motor etc.


Stress relief annealing series: 0.35mm、0.50mm

high speed stamping products, EI transformer, air conditioner motor etc.


New energy vehicle series: 0.20mm、0.25mm、0.27mm、0.30mm

automobile motor, transformer, reactor etc




Classification of electrical steel


Category

Silicon content, %

Nominal thickness, mm

 

Hot rolled silicon steel plate

(no orientation)

Hot-rolled low-silicon steel (hot-rolled electrical steel)

1.0~2.5

0.50

 

Hot-rolled high-silicon steel (hot-rolled transformer steel)

3.0~4.5

0.35 and 0.50

 

 

Cold rolled electrical steel sheet

Non-oriented electrical steel

(cold-rolled electrical steel)

Low carbon electrical steel

≤0.5

0.50 and 0.65

Silicon steel

>0.5~3.2

0.35 and 0.50

 

 

Oriented silicon steel

(cold-rolled transformer steel)

Ordinary grain oriented silicon steel

2.9~3.3

0.20,0.23,0.27

0.30 and 0.35

 

 

 

High magnetic induction oriented silicon steel

2.9~3.3

 



In addition to the types of electrical steel in the above table, there are also some electrical steel sheets for special purposes, such as 0.15 and 0.20mm thick 3%Si cold-rolled non-oriented silicon steel strips and 0.025, 0.05 and 0.1mm thick 3%Si cold-rolled oriented silicon steel thin strips. 0.7mm thick 3% Si high-strength cold-rolled non-oriented silicon steel plate for relays and power switches; high-strength cold-rolled electrical steel plate for new high-speed motor rotors ; Low-carbon electrical steel hot-rolled thick plates and cold-rolled plates for magnetic shielding of medical nuclear magnetic resonance tomography scanners and high-energy accelerator electromagnets; 4.5%~6.5% Si high-silicon steel plates for high-frequency motors and transformers, and magnetic shielding, etc. .



Properties of electrical Steel


General series

Grade
Nominal
Thickness
(mm)
Theoretical density
(kg/dm3)
Theoretical density
(kg/dm3)
Min.Magnetic induction(T)
50Hz

B25
B50
B100

30SW230

0.3

7.65

2.30

2.90

1.49

1.60

1.70

35SW230

 0.35

7.60

2.30

2.90

1.49

1.62

1.70

35SW250

 0.35

7.65

2.50

3.14

1.49

1.62

1.70

35SW270

 0.35

7.65

2.70

3.36

1.49

1.62

1.70

35SW300

0.35

7.65

3.00

3.74

1.49

1.62

1.70

35SW330

0.35

7.65

3.30

4.12

1.50

1.62

1.71

35SW360

0.35

7.65

3.60

4.55

1.51

1.63

1.72

35SW400

0.35

7.65

4.00

5.10

1.53

1.64

1.74

35SW440

0.35

7.70

4.40

5.60

1.54

1.65

1.74

50SW230

0.50

7.60

2.30

3.00

1.49

1.62

1.70

50SW250

0.50

7.60

2.50

3.21

1.49

1.62

1.70

50SW270

0.50

7.65

2.70

3.47

1.49

1.62

1.70

50SW290

0.50

7.65

2.90

3.71

1.49

1.62

1.70

50SW310

0.50

7.65

3.10

3.95

1.49

1.62

1.70

50SW330

0.50

7.65

3.30

4.20

1.49

1.60

1.70

50SW350

0.50

7.65

3.50

4.45

1.50

1.62

1.70

50SW400

7.70

4.00

5.10

1.53

1.64

1.73

50SW470

0.50

7.70

4.70

5.90

1.54

1.65

1.74

50SW530

0.50

7.70

5.30

6.66

1.56

1.65

1.75

50SW600

0.50

7.75

6.00

7.55

1.57

1.67

1.76

50SW700

0.50

7.80

7.00

8.80

1.60

1.69

1.77

50SW800

0.50

7.80

8.00

10.10

1.60

1.70

1.78

50SW1000

0.50

7.85

10.00

12.60

1.62

1.73

1.81

50SW1300

0.50

7.85

13.00

16.40

1.62

1.74

1.81

65SW400

0.65

7.65

4.00

5.20

1.52

1.65

1.72

65SW600

0.65

7.75

6.00

7.71

1.56

1.68

1.76

65SW700

0.65

7.75

7.00

8.89

1.57

1.67

1.76

65SW800

7.80

8.00

10.26

1.60

1.70

1.78

0.65

65SW1000

0.65

7.80

10.00

12.77

1.61

1.71

1.80

65SW1300

0.65

7.85

13.00

16.60

1.61

1.71

1.80


High Efficient Series

Grade

Nominal Thickness

Nominal Density

P15/50

Max. loss

B50

Min. Magnetic induction

Grade

(mm)

(kg/dm3)

(W/kg)

(T)

35SWH250

0.35

7.65

2.50

1.68

50SWH470

0.50

7.70

4.70

1.72

50SWG470

0.50

7.75

4.70

1.72

50SWH600

0.50

7.75

6.00

1.72

50SWH800

0.50

7.80

8.00

1.74

50SWH1300

0.50

7.85

13.0

1.76



Stress Reliefannealing Series

Grade
Nominal Thickness
Nominal Density
P15/50 B50
Max. loss
Min. Magnetic induction
(mm)
(kg/dm3)
(W/kg)
(T)

35SWR300

0.35

7.80

3.00

1.73

50SWR350

0.50

7.80

3.50

1.74

50SWR450

0.50

7.85

4.50

1.72



New Energy Vehicle Series

Grade

Normal

Nominal Density

P10/400

B50

Thickness
Max. core loss
Min. Magnetic induction

(mm)

(kg/dm3)

(W/kg)

(T)

20SW1200

0.20

7.60

12.0

1.61

20SW1500

0.20

7.65

13.0

1.64

25SW1250

0.25

7.60

12.5

1.63

25SW1250H

0.25

7.60

12.5

1.65

25SW1300

0.25

7.60

13.0

1.63

27SW1400H

0.27

7.60

14.0

1.65

27SW1400

0.27

7.60

14.0

1.64

27SWH1400

0.27

7.65

14.0

1.64

27SWG1400

0.27

7.65

14.0

1.67

30SW1500

0.30

7.60

15.0

1.64

30SWH1500

0.30

7.65

15.0

1.65

30SWG1500

0.30

7.65

15.0

1.67

35SW1700

0.35

7.60

17.0

1.64

35SWG1700

0.35

7.65

17.0

1.68

35SW1700H

0.35

7.60

17.0

1.63

35SW1900

0.35

7.65

19.0

1.66

35SWH1900

0.35

7.65

19.0

1.67



Production process of electrical steel

smelt

 

Silicon steel is mainly smelted by oxygen converter, combined with vacuum treatment of molten steel and AOD technology during smelting and aluminum (0.2-0.5%) content to meet the requirements of different magnetic properties. The silicon and aluminum content of high-grade silicon steel sheets should be increased accordingly. Carbon, sulfur and inclusions should be minimized.

rolling

 

The magnetism, surface quality, filling factor and punchability of cold-rolled silicon steel sheets are better than those of hot-rolled silicon steel sheets, and they can be produced in coils. Therefore, some countries have stopped producing hot-rolled silicon steel sheets since the 1960s. China adopts a low temperature of about 900 one-time rapid hot rolling and stacking annealing under the protection of hydrogen to manufacture hot-rolled silicon steel sheets. The yield is high, and the surface quality and magnetic properties of the finished products are good.

pickling

 

The oxides of the hot-rolled steel strip are removed by the descaling machine and the hydrochloric acid tank to prevent surface defects of the cold-rolled finished product.

cold rolling

 

In order to ensure the thickness and material for different purposes, the deceleration ratio is set at 40%-90%, and advanced control equipment such as automatic thickness control and automatic shape control is realized.

annealing

 

It is a process of softening the material of the steel strip hardened in the cold stamping process. Through metal heating and rapid cooling, steel for deep processing and high-tensile steel are produced, and boxing (cover annealing) annealing and continuous annealing methods are adopted.

insulating coating

 

When the silicon steel plate is processed into an iron core, in order to improve its processing performance and prevent eddy current loss equivalent to the multiplication of the thickness of the steel plate, continuous coating equipment is used to spray insulating coating liquid on the upper and lower sides of the steel plate.



Product Packing


 

1.Rolled silicon steel

7.Inner iron plate guard

2.Inner rusty-resisted paper

8.Outside iron plate guard

3.Outside anti-rust paper

9.End iron plate guard

4.Plastic seal

10.Inner iron corner guard

5. Inner paper corner guard

11.Outside iron corner guard

6.Outside paper corner guard

12.Radial iron banding strip


-Product grade standard


 Type

(mm)

Shougang

NSC

JFE

TKS

Posco

NI&Sco

AK

Thickness

 General series

 0.35

35SW230

35H230

35JN230

M235-35A

35PN230



35SW250

35H250

35JN250

M250-35A

35PN250

2413

M-15

35SW270

35H270

35JN270

M270-35A

35PN270

2412

M-19

35SW300

35H300

35JN300

M300-35A

35PN300

2411

M-22/M-27

35SW360

35H360

35JN360


35PN360



35SW440

35H440

35JN440


35PN455



35SW550




35PN560



 0.50

50SW230

50H230

50JN230

M230-50A

50PN230



50SW250

50H250

50JN250

M250-50A

50PN250



50SW270

50H270

50JN270

M270-50A

50PN270

2414


50SW290

50H290

50JN290

M290-50A

50PN290

2413

M-15

50SW310

50H310

50JN310

M310-50A

50PN310

2412

M-19








0.50

50H350

50JN350

M350-50A

50PN350


M-22



M400-65A

50PN400


M-27/M-36

50SW470

50H470

50JN470

M470-50A

50PN445

2214


50SW600

50H600

50JN600

M600-50A

50PN595

2212


50SW700

50H700

50JN700

M700-50A

50PN760


M-47

50SW800

50H800

50JN800

M800-50A

50PN890

2011


50SW1000

50H1000

50JN1000

M940-50A

50PN1015



50SW1300

50H1300

50JN1300

M1100-50A

50PN1270



 0.65

65SW400




65PN400



65SW800


65JN800

M800-65A

65PN890


M-47

65SW1000


65JN1000

M1000-65A

65PN1015



65SW1300


65JN1300

M1300-65A

65PN1270



 High efficient series

0.35

35SWH250







35SWH300







 0.50

50SWH470


50JNE470





 50SWH600














50SWH1300







Stress relief
annealing series

0.50

50SWR350


50JNA350





50SWR1300








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