Electrical Steel

Cold Rolled Grain Oriented - CRGO

From 

Aribasteel Ltd.

The official agent of Russian CRGO For the Arabian Gulf Markets (including Iraq)

 

3. Properties

 

3.1 Dimensional product mix 

 

Fully-processed cold-rolled grain-oriented electrical steel (CRGO) is supplied in line with GOST 21427.1 (Russia), EN 10107 (EC), NLMK standard and technical specifications agreed with the customers. Grain-oriented electrical steel is supplied with electric insulation non-organic coating.

 

Nominal thickness, mm

0,23; 0,27; 0,30; 0,35; 0,50

Width, mm

 

    - coils

up to 1000

    - slit strip

90-500

Coil ID, mm

500

Coil weight, t

up to 5

 


 

Nominal thickness, mm

0,23; 0,27; 0,30

0,35; 0,50

Max. thickness deviation, mm

± 0,020

± 0,030

Max. weld thickness deviation, mm

0,02

Transverse thickness deviation, max., mm

0,02

Longitudinal thickness deviation (1500 mm of length), max., mm

0,02

Burr height, max., mm

0,02

 

Nominal width, mm

L≤ 250

250<L≤500

L>500

Max. width deviation , mm

+0,8

+1,2

+0,5%

 

 

 

 

Wave factor, %, max.

1,5

Wave height, max., mm

3,0

Camber (1500 mm of length), max., mm

0,5

 

 

 

 

 

 

Grain-oriented electrical steel meeting other product mix requirements can be produced according to special order upon additional agreement.

 

3.2 Magnetic properties

 

European standard EN 10107

Steel grade

Nominal thickness, mm

Guaranteed magnetic properties

Typical magnetic properties

Р1,5/50, max.,  W/kg

Р1,7/50, max., W/kg

В800, min, T

Р1,5/50, W/kg, average

Р1,7/50, W/kg, average

В800,T, average

M100-23S

0,23

 

1,00

1,88

0,68

0,99

1,88

М110-23S

 

1,10

1,78

0,69

1,06

1,86

М120-23S

 

1,20

1,78

0,74

1,11

1,86

М127-23S

 

1,27

1,75

0,77

1,21

1,84

 

 

 

 

 

 

 

State standard of Russia GOST 21427.1

 

 

 

Steel grade

Nominal thickness

mm

Guaranteed magnetic properties

Typical magnetic properties

Р1,5/50, max.,  W/kg

Р1,7/50, max., W/kg

В800, min, T

Р1,5/50, W/kg, average

Р1,7/50, W/kg, average

В800,T, average

3409

0,27

 

1,08

 

0,75

1,06

1,88

3408

 

1,14

 

0,78

1,12

1,88

3407

 

1,20

 

0,80

1,16

1,87

3406

 

1,27

 

0,83

1,23

1,86

3409

0,30

 

1,14

 

0,81

1,13

1,88

3408

 

1,20

 

0,82

1,17

1,88

3407

 

1,26

 

0,84

1,22

1,87

3406

 

1,33

 

0,89

1,28

1,86

3409

0,35

 

1,24

 

0,89

1,22

1,87

3408

 

1,30

 

0,92

1,27

1,87

3407

 

1,36

 

0,93

1,31

1,86

3406

 

1,43

 

0,98

1,41

1,83

 

Corporate standard NLMK STO 05757665-008

Steel grade

Nominal thickness mm

 

Guaranteed magnetic properties

Typical magnetic properties

Р1,5/50, max.,  W/kg

Р1,7/50, max., W/kg

В800, min, T

Р1,5/50, W/kg, average

Р1,7/50, W/kg, average

В800,T, average

NV23S-100

0,23

-

1,00

1,87

0,68

0,99

1,88

NV23S-110

0,73

1,10

1,85

0,69

1,06

1,86

NV23S-120

0,77

1,20

1,83

0,74

1,13

1,86

NV23S-127

0,80

1,27

1,82

0,78

1,22

1,85

NV27P-100

0,27

-

1,00

1,88

0,68

0,99

1,88

NV27S-105L

-

1,05

1,87

0,74

1,04

1,88

NV27S-110

0,75

1,10

1,86

0,74

1,07

1,88

NV27S-120

0,80

1,20

1,84

0,78

1,13

1,87

NV27S-130

0,85

1,30

1,83

0,81

1,24

1,85

NV27S-140

0,89

1,40

1,82

0,86

1,35

1,83

NV30P-105

0,30

-

1,05

1,88

0,77

1,04

1,88

NV30S-110L

-

1,10

1,87

0,78

1,08

1,88

NV30S-120

0,80

1,20

1,86

0,80

1,16

1,88

NV30S-130

0,85

1,30

1,84

0,84

1,25

1,86

NV30S-140

0,89

1,40

1,78

0,88

1,34

1,83

NV35S-120

0,35

0,90

1,20

1,86

0,86

1,18

1,87

NV35S-130

0,95

1,30

1,83

0,91

1,26

1,85

NV35S-145

1,00

1,45

1,81

0,95

1,35

1,84

 

Technical specification NLMK TU 14-106-769

Steel grade

Nominal thickness

mm

 

Guaranteed magnetic properties

Typical magnetic properties

Р1,5/50, max.,  W/kg

Р1,7/50, max., W/kg

В800, min, T

Р1,5/50, W/kg, average

Р1,7/50, W/kg, average

В800,T, average

NV23S-095L

0,23

 

0,95

1,87

0,66

0,94

1,88

NV23S-100L

 

1,00

1,86

0,67

0,98

1,87

NV23S-105L

 

1,05

1,85

0,71

1,02

1,86

NV27S-095L

0,27

 

0,95

1,87

0,67

0,94

1,88

NV27S-100L

 

1,00

1,86

0,68

0,98

1,87

NV27S-105L

 

1,05

1,85

0,74

1,02

1,86

NV30S-100L

0,30

 

1,00

1,87

0,75

0,99

1,88

NV30S-105L

 

1,05

1,86

0,77

1,03

1,87

NV30S-110L

 

1,10

1,85

0,78

1,07

1,86

 

Reference formulas for the conversion of specific loss at 50 Hz into specific loss at 60 Hz:

P 1,5/60= P 1,5/50*1,266

P 1,7/60= P 1,7/50*1,316

 

“L” in grade designations means that the steel has undergone domain refining by laser treatment. In the course of using this steel its annealing (heating in excess of 450 0С) is not recommended, since annealing restores initial magnetic properties (laser treatment effect is lost).


The appearance of laser-treated steel with refined domain structure does not differ from that of untreated steel.  Laser treatment marks can be observed after electric insulation coating is removed.

 

The appearance of laser-treated steel surface, coated and uncoated.

                  Coated                                                     Uncoated

The measurements of magnetic properties are done in accordance with IEC 60404, GOST 12119.

 

3.3 Physical and mechanical properties

Indicator

Value

Thickness, mm

0,23

0,27

0,30

0,35

σт, N/mm2

Longitudinal

average

335

339

332

335

min-max

320-360

315-350

315-360

310-360

Transverse

average

357

358

352

354

min-max

345-370

349-369

344-361

347-365

σ4, МPа

Longitudinal

average

362

359

354

356

min-max

340-375

341-372

336-376

338-375

Transverse

average

405

409

400

408

min-max

395-415

399-421

386-426

390-425

δ4, %

Longitudinal

average

8

9

10

11

min-max

6-12

7-13

7-16

 

Transverse

average

27

28

28

29

min-max

24-30

24-31

24-37

25-37

HV5

average

175

174

178

177

min-max

165-190

164-182

165-195

168-200

Stacking factor, %

average

0,950

0,955

0,960

0,965

Specific electrical resistance, Ohm·mm2/m

average

0,475

min-max

0,45-0,50

Specific density, kg/m3

7650

Number of bends

≥2

Coefficient of ageing, %

≤2

 

3.4 Electric insulation coating

Grain-oriented electrical steel is supplied in coils and slit coils with electric insulation coating:

Ø  «СМ» coating (Coating Magnetoactive) – ground layer based on magnesium and silicon oxides covered with silicon phosphates and oxides (S2 coating analogue, as well as С2+С5 coating acc. to ASTM А976М).

 

Technical properties

 

Coating type acc. to STO 05757665-008-2007

СМ

Coating type acc. to

GOST 21427.1

ЭТ

Class ASTM 976

С2+C5

EN 10342

EC-5-G

Color

Grey or brown grey

Coating

double-side

Coating thickness, mm

2,0-5,0

Resistance coefficient, Ohm×cm2

≥20

Heat resistance

830 0С, 10 h., protective atmosphere (90 % N2 +10 % H2)

Oil resistance

good

 

 

 

 

 

 

 

 

 

 

Download full brochure in PDF file

 

 

Address:

Aribasteel Ltd.
 P.O. Box 52e. Worcester Park. Surrey KT4 8LR. United Kingdom

Phone:

+44 (0) 20 8335 3339

Fax:

+44 (0) 70 9233 9335

Email :

steel@aribasteel.com

Web:

www.aribasteel.com