GOST 21427.2-83

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  ГОСТ 21427.2-83

GOST 21427.2−83 cold-rolled isotropic electrotechnical Steel sheet. Technical specifications (with Changes 1−5 N, adjusted)

GOST 21427.2−83
Group B33

INTERSTATE STANDARD

COLD-ROLLED ELECTROTECHNICAL STEEL
AN ISOTROPIC SHEET

Specifications

Cold-rolled isotropic electrical-sheet steel. Specifications

ISS 77.140.50
OKP 09 8800

Date of introduction 1984−01−01

INFORMATION DATA

1. DEVELOPED AND INTRODUCED by the Ministry of metallurgy of the USSR

2. APPROVED AND put INTO EFFECT by Decision of the USSR State Committee for standards from 21.06.83 N 2610

3. REPLACE GOST 21427.2−75

4. THE STANDARD FULLY COMPLIES ST SEV 101−85

5. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS

The designation of the reference document referenced	Item number
GOST 427−75	4.2
GOST 2999−75	4.7
GOST 4381−87	4.2
GOST 6507−90	4.2
GOST 7566−94	3.1; 3.4; 5.1; 5.1.3
GOST 11701−84	4.6
GOST 12119.0−98 — GOST 12119.8−98	4.8; 4.10; 4.15
GOST 26877−91	4.3

6. Limitation of actions taken by Protocol No. 5−94 of the Interstate Council for standardization, Metrology and certification (ICS 11−12−94)

7. EDITION Changes N 1, 2, 3, 4, 5, approved in December 1985, October 1986, March 1987, September 1988, December 1990 (IUS 4−86, 1−87, 6−87, 1−89, 4−91)

AMENDED, published in the IUS N 7, 2007

An amendment made by the manufacturer of the database

This standard applies to cold-rolled sheet of isotropic electrical steel, used in magnetic circuits of electrical machinery, apparatus and appliances.

The standard contains all the requirements of ST CMEA 101 and sets more stringent requirements as part of the rules of magnetic induction, coefficient of aging for steel with a mass fraction of silicon in excess of 1.8%, telescopically rolls of a width of 500 mm and above (see Annex 3 on the compliance of the requirements of this standard the requirements of the standard CMEA).

(Changed edition, Rev. N 2).

1. ASSORTMENT

1.1. Manufactures steel stamps: 2011, 2012, 2013, 2111, 2112, 2211, 2212, 2213, 2214, 2215, 2216, 2312, 2411, 2412, 2413, 2414 and 2421.

(Changed edition, Rev. N 4, 5).

1.2. Steel classification:

by product: sheet, rolled steel, cut strip (ribbon);

precision of rolling thickness:

normal precision — N;

high accuracy — P;

accuracy of manufacturing width:

normal exactly

increased accuracy — sh;

flatness for classes 1 and 2;

for camber (for steel coils and strips);

normal exactly

increased accuracy — With;

heat treatment:

heat-treated magnetic properties,

without heat treatment on magnetic properties;

by type of coverage:

without cover (with metal surface),

with permastone insulating coating that improves stanoevski — NSH,

with heat-resistant insulating coating that improves stanoevski — SH,

with heat-resistant insulating coating without impairing stanoevski — T;

the fill factor for groups: A and B.

1.3. Rolled steel is manufactured with a thickness of 0.27; 0.35 and 0.50 mm and a width of 500, 530, 600, 670, 740, 750, 805, 815, 825, 840, 860, 865, 880, 905, 935, 965, 985, 990, 1000, 1015, 1030, 1050, 1065 mm.

The size of the sheets shall be as specified in table.1.

Table 1

mm

Thickness	Length sheets with a width of
500	750	1000
0,27; 0,35; 0,50	1500	1500	2000

Note. On demand of the consumer is allowed to produce rolls or sheets of different width, but not more than 1100 mm.

1.2, 1.3. (Changed edition, Rev. N 5).

1.4. The tape is manufactured with a thickness of 0.27; 0.35 and 0.50 mm and a width of 90, 95, 107, 123, 130, 138, 140, 150, 156, 160, 170, 175, 187, 200, 215, 226, 233 250, 260, 280, 290, 300, 322, 325, 360, 400, 445 mm.

Note. By agreement with the consumer allowed to make another tape of an intermediate width.


(Changed edition, Rev. N 1, 4, 5).

1.5. The mass of one cut roll of tape shall be not less than the mass calculated from the rate of 0.5 kg per 1 mm of belt width.

(Changed edition, Rev. N 5).

1.6. Maximum deviations in thickness of steel shall be as specified in table.2.

Table 2

mm

Thickness	Limit deviation on thickness of steel with precision rolling
normal	high
0,27	+0,01	+0,01
-0,03	-0,02
0,35	±0,03	±0,02
0,50	±0,04	±0,03

(Changed edition, Rev. N 4, 5).

1.7. Sheets, steel coils and strips are produced with obraznymi edges.

1.8. Limit deviations on width of rolled steel sheets and strips must conform to table.3.

Table 3

mm

Width	Maximum deviation in precision manufacturing
normal	high
SV. 500	+0,5%	+1,0
«250 to 500 incl.	+1,2	+0,5
«150» 250 «	+0,8	+0,5
Up to 150	+0,5	+0,3

(Changed edition, Rev. N 1, 2).

1.9. Limit deviation of leaves along the length shall not exceed +0,5%.

1.10. Longitudinal and transverse thickness variation of the sheet and transverse thickness variation of rolled steel shall not exceed the sum of limit deviations for thickness. For steel coils and strips thickness of 0.5 mm high precision rolling transverse thickness variation should not exceed 0.02 mm. thickness variation of the Transverse strips should not exceed the limits specified in table.3A.

Table 3A

mm

Thickness	Lateral thickness variation of the tape with a width of
up to 300	over 300 to 500
0,27	0,02	0,02
0,35; 0,50	0,02	0,03

(Changed edition, Rev. N 2, 5).

1.11. Warpage should not exceed the limits specified in table.4.

Table 4

Steel	The nonplanarity of steel in 1 m, mm, for classes
1	2
Sheet, strip	4	8
Rolled steel	Two	4

Notes:

1. For rolled steel manufactured without heat treatment or heat treated in coils impassable furnaces, Norma flatness should not exceed 8 mm to 1 m.

2. At the request of the consumer tape is manufactured with the norms stipulated for a rolled steel.

1.12. The ratio of height flatness to its length shall be those specified in table.5.

Table 5

Steel	The ratio of height flatness to its length, %, not more, for steel grades
1	2
Sheet, strip	2	5
Rolled steel	1	2

Notes:

1. Grade tape 2 is allowed to produce by agreement between manufacturer and consumer.

2. At the request of the consumer tape is manufactured with the norms stipulated for a rolled steel.

1.11, 1.12. (Changed edition, Rev. N 5).

1.13. Camber of steel coil and strips 1 m of length should correspond specified in the table.6.

Table 6

mm

Width	The precision of rolling thickness
normal	increased
Up to 250 incl.	3	2
SV. 250	2	1

1.14. Basically a telescoping of rolls must not exceed:

5 mm steel with a width up to 500 mm;

7 mm — with a width of 500 mm steel and above.

The individual turns of the coil should not be more than five times the thickness of the steel. One or two inner or outer coil can protrude above the surface of the end coil.

1.15. At the request of the consumer standardized residual curvature of the roll. Norms are established by agreement between manufacturer and consumer.

1.16. The inner diameter of the roll shall be (500±10) mm, non-alloy steel (500±10) or (600±10) mm. Outer diameter — 1500 mm. Winding should be smooth, dense.

Examples of symbols

Sheet thickness 0.50 mm, width 750 mm, length 1500 mm, normal precision rolling, normal accuracy in width, with the nonplanarity of the grade 2, annealed, uncoated, with a fill factor of group B, steel grade 2211:

Sheet 0,50х750х1500-N-2-B-2211 GOST 21427.2−83

Rolled steel thickness 0.35 mm, width 1000 mm, high precision rolling, high accuracy by width, high accuracy on camber, with flatness class 1, heat treated, with heat-resistant insulating coating, brand ТШ1 improving stanoevski, with the fill factor of group A, of steel grade 2412:

Roll 0,35х1000-P-W-p-1-ТШ1-A-2412 GOST 21427.2−83

Tape thickness 0.50 mm, width 250 mm, high precision rolling, normal accuracy in width, high accuracy on camber, with the nonplanarity of the class 2 heat treated with a heat-resistant insulating coating without impairing stanoevski, stamps T1, with the fill factor of group B, steel grade 2311:

Tape 0,50h250-P-s-2-T1-B-2311 GOST 21427.2−83

(Changed edition, Rev. N 5).

2. TECHNICAL REQUIREMENTS

2.1. Electrotechnical steel shall be manufactured in accordance with the requirements of this standard for technological regulations approved in the prescribed manner.

2.2. Steel of all grades, except grades 2011, 2012 and 2013, are made in heat-treated magnetic properties.

2.3. Steel, supplied without heat treatment, produce uncoated. Steel, heat treated magnetic properties, coated or uncoated. Type of coating is determined by agreement between manufacturer and consumer.

2.2, 2.3. (Changed edition, Rev. N 5).

2.4. The surface of the steel shall conform to the requirements specified in table.7.

Table 7

Type of heat treatment of steel	The characteristics of surface quality	The defects allowed	The depth or height of occurrence of defects
Heat-treated magnetic properties without insulating coatings	Smooth, without rust and loose scale, prints and crumpled surface, plaque powdery substances that hinder the coating application. Allowed color of a tint	Prints	½ of the sum of limit deviations for thickness
Without heat treatment on magnetic properties	Smooth, without cracks, shells, shells, rolled out of the dirt, scale, corrosion. Allowed thin oxide film, the color of the tint	Scratches no longer than 100 mm, individual defects, slivers, nicks and sinks	½ of the sum of limit deviations for thickness

Note. It is possible to manufacture steel without heat treatment on the magnetic properties with an oily surface.


(Changed edition, Rev. N 2).

2.5. On edges of steel should not be bundles. Allowed defects on the edges, not displaying the steel beyond the nominal size.

2.6. The number of bends for steel, made in heat treated condition shall be those specified in table.8.

Table 8

Steel grade	The arithmetic mean and the minimum number of bends for steel thickness, mm, not less
0,27	0,35	0,50
2211, 2212, 2213, 2214, 2215, 2216	-	-	10 (3)
2312	-	-	7 (2)
2411, 2412, 2413, 2414	-	3 (2)	3 (1)
2421	3 (1)	-	-

Note. In parentheses are the minimum number of bends of each sample.


(Changed edition, Rev. N 2, 5).

2.7. Mechanical properties of steel shall conform to the standards specified in table.8A.

Table 8A

Steel grade	Tensile strength, N/mm	Elongation , %	Hardness
2011, 2012,2013	290−490	15−35	120−160
2111, 2112, 2211, 2212, 2215	300−450	20−35	110−145
2213, 2214, 2216	120−145
2312	330−470	20−35	120−160
2411, 2412, 2413, 2414, 2421	370−600	15−30	140−210

2.8. The magnetic properties of steel shall conform to the standards specified in table.9.

Table 9

Steel grade	Thickness, mm	Specific magnetic losses in W/kg, not more	Magnetic induction in magnetic field of 2500 A/m, B, T, not less	Anisotropy of magnetic induction, T, not more	The coefficient of anisotropy of the specific magnetic losses, %, not more
2421	0,27	19,5	Of 1.47	0,16	±18
2413	2,5	1,50
2412	0,35	2,7	1,50	0,16	±18
2411	3,0	1,50
2414	2,7	1,49
2413	2,9	1,50
2412	3,1	1,50	0,16	±18
2411	3,6	1,49
2312	3,8	1,58	±14
2216	4,0	1,60
2215	4,5	1,64
2214	4,8	1,62
2213	5,0	1,65	±12
2212	0,50	5,0	1,60
2211	5,5	1,56	0,13
2112	6,0	1,62
2111	7,0	1,60
2013	6,5	1.65
2012	7,0	1,62	±10
2011	8,0	1,60

Note. Value of magnetic induction is given for a constant magnetic field. By testing samples in an alternating field value of magnetic induction () of the table correspond .


The properties of steel supplied without heat treatment on magnetic properties, determined on the annealed samples.

The values of specific magnetic losses () and the magnetic induction , , , are given in Appendix 2, the manufacturer is not identified and provided by the manufacturing technology.

2.9. Anisotropy of magnetic induction in magnetic field of 2500 A/m should not exceed the limits specified in table.9.

At the request of the consumer instead of the anisotropy of magnetic induction determine the coefficient of anisotropy of the specific magnetic losses. The coefficient of the anisotropy of the specific magnetic losses in induction of 1.5 T must conform to the standards given in table.9.

The differences in the definition of the coefficient of anisotropy is carried out to determine the anisotropy of magnetic induction.

2.10. The coefficient of aging on specific magnetic losses in steel should not exceed the limits specified in table.10.

Table 10

Steel grade	The ageing factor, %, not more
2011, 2012, 2013	8
2111, 2112, 2211, 2212, 2213, 2214, 2215, 2216	6
2312, 2411, 2412, 2413, 2414, 2421	4

Notes:

1. Allowed by agreement between manufacturer and consumer (except the enterprises of the Ministry of electrotechnical industries) is a manufacturer of steel stamps 2011, 2012 and 2013 with the ageing coefficient is not more than 10%.

2. In case of exceeding the ratio of aging the steel is allowed to approve a trademark, which corresponds to the loss rate measured on the specimen after aging.

2.11. Physical and performance properties of the insulating coating must conform to the standards specified in table.10A.

Table 10A

Kind of coverage	Mark cover	Coefficient of resistance, Ohm·cm, not less	Temperature resistance	The adhesion strength of the coating with metal (adhesion)	Impact on stanoevski	The basis of the coating
T	T1	1,0	760 °C, 1.5 h in a protective atmosphere or 700 °C, 2 min in air	Does not degrade	Inorganic
T5	5,0
TSH	ТШ1	1,0	700 °C, 1.5 h in a protective atmosphere	The coating should not flake off during bending of the sample	Nurture semi-organic (blend of organic from inorganic)
ТШ10	10,0
ТШ20	20,0
ТШ40	40,0	Improves
NSH	НШ1	1,0	200 °C, 24 h air	Nurture semi-organic or organic
НШ10	10,0
НШ20	20,0
НШ40	40,0

Notes:

1. In naming the brand coverage figures correspond to the minimum value of the resistance coefficient.

2. The term «heat resistance» means that the coating must preserve the value of the drag coefficient after heating to the indicated temperature, and upon exposure to the specified atmosphere. Other coverage requirements established by agreement between manufacturer and consumer.

2.12. The fill factor of the steel must conform to the standards specified in table.11.

Table 11

Thickness, mm	The fill factor, however, for steel band
And		B
uncoated	coated	uncoated	coated
0,27	0,94	0,93	0,93	0,92
0,35	0,96	0,95	0,95	0,95
0,50	0,97	0,96	0,96	0,95

Note. For coated steels НШ10, НШ20 and НШ40 the fill factor to 01.01.93 rejection is not a sign and is defined for statistical purposes.

2.13. Steel, made in the heat-treated sheets, is to have the lowest residual stresses. The clearance between the parts of the cut sheet should not exceed 2 mm.

2.14. On demand of the consumer steel is manufactured with standard:

specific magnetic losses at any one value of magnetic induction and magnetic induction at any one value of the magnetic field in accordance with table.9 and Annex 1A.

2.15. The density and electrical resistivity of steel is given in Annex 2.

2.7−2.15. (Changed edition, Rev. N 5).

3. ACCEPTANCE RULES

3.1. Steel coils, sheets and strips take parties. The party must consist of one steel smelting, one brand, one size in thickness, one annealing at the annealing in bell-type furnaces or a coil — annealing in continuous furnaces and to be accompanied by a document of quality in accordance with GOST 7566 with the addition of:

the recommended heat treatment regime of steel manufactured without heat treatment;

the values of magnetic properties measured on the longitudinal sample, for tape of a width less than 300 mm.

(Changed edition, Rev. N 1, 5).

3.2. Control the size, thickness variation, flatness, camber, surface condition and edges, testing for inflection, magnetic properties, resistance coefficient, strength of the adhesion is carried out on one roll or one bundle from the party.

The tape and sheets obtained by cutting one coil to the specified width or length, such as one roll.

3.3. Determination of the coefficient of aging, the fill factor of the coefficient of anisotropy of the specific magnetic loss or magnetic induction and the residual stress, the manufacturer conducts periodic not less than 35 parties in the quarter. Mechanical properties determined on every tenth heat. The obtained values are averaged.

At the request of the consumer, the coefficient of anisotropy of the specific magnetic losses or anisotropy of the magnetic induction is determined for each batch.

The coating is heat resistant is provided by its chemical basis and technology of its application.

If unsatisfactory results of the periodic tests they are transferred to acceptance to get a positive result for three parties in a row. The results of the periodic tests indicated in the document of quality by the consumer.

3.2, 3.3. (Changed edition, Rev. N 5).

3.4. If unsatisfactory validation results at least one of the indicators of re-examination it is carried out on a sample selected according to GOST 7566.

4. TEST METHODS

4.1. For testing from each selected roll, cut off one segment with a length of 1500−2000 mm, from a pack take two sheets evenly on top.

4.2. The dimensions of the steel check of the measuring tool, providing the necessary measurement accuracy:

thickness micrometer (GOST 6507 or GOST 4381), the width of a metal line (GOST 427) or by other measurement means appropriate accuracy.

The thickness of the sheets selected from the rolls of the segments is measured at four points located in the middle of each side cut or sheet at a distance of not less than 20 mm from the edges. The thickness of each measurement point shall not exceed the established norms. Check thickness variation by measuring the thickness.

4.3. To determine flatness and camber cut of the roll, tape or sheet is laid freely on a flat plate, making sure that the corners are snug against the plate.

The nonplanarity of the measured pattern, a ruler or a special device in the areas of maximum cut or peel-off sheet from the plate. Warpage should not exceed the permissible values for the segment length.

Camber is measured meter line in places of the greatest deviation of side edge from a straight cut line.

Deviation from flatness (warpage), camber and thickness variation is determined according to GOST 26877.

4.2, 4.3. (Changed edition, Rev. N 5).

4.4. The surface condition and edges check inspection without the use of magnifying devices.

4.5. The test bend is carried out on four specimens with a width of 20−40 mm, cut with no visible burrs. If there are differences in the used samples having a width of 30 mm. the Samples cut along and across the direction of rolling. Two samples cut at a distance of 30−90 mm from the edge; two samples from the middle of the segment or sheet. The test is carried out in a vise with a radius of curvature of the jaws 5 mm at a temperature of from 15 to 35 °C.

During the test shall be provided with a permanent adhesion of the sample to the surface of the jaws. A single fold — bend sample from the initial position at 90° and straighten back up to the starting position. A half bend is considered a bend 90° without rectification.

The destruction of the sample is considered failure of the specimen or a crack of any length. The obtained values of the excesses are rounded to the nearest whole or poluslova of inflection.

The result of the test taking the arithmetic mean of the excesses of the four samples. Rules for inflection is set at a confidence level of 0.97.

4.6. For tensile tests of the selected segment cut two short sample, and from each selected sheet — one short sample according to GOST 11701. The tests are carried out according to GOST 11701. Allowed to use non-destructive methods of control.

4.7. The hardness is determined on two samples of size 280х30 mm in accordance with GOST 2999 at a load of 5 kg. measured at five points evenly along the length of the sample. The result of taking the average of 10 measurements.

4.8. The sample for measuring the magnetic properties of manufactured according to GOST 12119.0 — GOST 12119.8. The first strip from the edges of the sample do not include.

To determine anisotropy of magnetic induction and of specific magnetic losses produce two samples: one of the longitudinal strips, the other of a cross.

4.9. The annealing conditions of the samples of steel grades for 2011, 2012, 2013: heating in a protective atmosphere to a temperature not higher than 830 °C, exposure at this temperature for no more than 2 hours, cooling to 600 °C at a rate of 50 °C per hour, then — with the furnace.

(Changed edition, Rev. N 4, 5).

4.10. Specific magnetic losses and the magnetic induction is determined in the apparatus Epstein GOST 12119.1. The density is calculated according to GOST 12119.0 — GOST 12119.8.

Allowed to determine the magnetic properties of other methods providing the required accuracy of measurements.

If there are differences in the magnetic properties determined in the apparatus Epstein.

Norms of specific magnetic losses and magnetic induction established at a confidence level of 0.95.

The anisotropy of magnetic induction is defined as the difference of induction of the sample, composed of longitudinal strips, and a sample composed of transverse bands, in magnetic field of 2500 A/m.

The coefficient of anisotropy of the specific magnetic losses (), %, is calculated by the formula

,

where and is the specific magnetic losses along and across the direction of rolling, W/kg.

(Changed edition, Rev. N 3).

4.11. For the determination of the aging of the sample after determining the magnetic properties is subjected to aging according to the mode: heating up to 120 °C, exposure time 120 h and again determine the specific magnetic losses.

The ageing factor (), %, is calculated by the formula

,

where and is the specific magnetic losses before and after aging W/kg.

4.12. For measurement of resistance ratio of insulating coating from each selected cut sheet or cut out a sample width of 60−120 mm and a length equal to the width of the sheet or cut.

To determine the adhesion of coatings to metal, cut out a sample width of 30 mm, a length equal to the width of the segment or sheet.

(Changed edition, Rev. N 5).

4.13. To determine the strength of adhesion of the coating to a metal sample is tightly pressed against the rod 20 mm in diameter and smoothly bent 90° around the web.

The sample is considered to pass the tests, if with its outer side has no cracks and delaminations. Delamination and crack is determined visually.

4.14. (Deleted, Rev. N 5).

4.15. The ratio of the resistance of insulating coatings is determined according to GOST 12119.0 — GOST 12119.8. The measurement is performed at four sites, two on one and the other sides of the sample.

The calculation of the coefficient of resistance average current is taken as the arithmetic mean of the four measurements.

By agreement between the consumer and the manufacturer in the document on quality indicates the value of the coefficient of resistance on each side.

(Changed edition, Rev. N 5).

4.16. The fill factor is determined on a sample composed of no less than 100 bands are taken to determine the magnetic properties, which before the test, remove the burrs. The sample is pressed evenly across the surface under pressure of 0.35 N/mm. The height of the compressed sample is measured with an error of less than 0.1 mm in four opposite places. For the height take the average results of four measurements.

The fill factor () is calculated by the formula

,

where is the mass of sample, kg, determined with an accuracy of 0.005 kg;

 — the volume of the sample after pressovaniya determined according to the measurement results of pack, m;

 — the density of steel, kg/m.

4.17. To check the residual stress of thermally processed sheet is cut down the middle and shift to the plane of the cut edges to the contact and measure the width of the formed gap.

(Changed edition, Rev. N 5).

4.18. (Deleted, Rev. N 5).

5. MARKING, PACKAGING, TRANSPORTATION AND STORAGE

5.1. Marking, packaging, transportation and storage — by GOST 7566 with additions.

5.1.1. The roll segments must be connected by butt welding, it is possible to retrieve with no welding no more than three strands in a coil. The thickness of the steel at the weld shall not increase by more than 1.5 sum of limit deviations for thickness. Place of podmolik should be clearly marked. The ends of the coils can be attached by spot welding, the burn-through is not permitted. At the request of the consumer when cutting the roll into two strips designated cutting mark on the outer turn of the roll.

Tape, wound on a single winder, it is allowed to package without spacers between the coils.

Packaging one pack of sheets and winding into a roll of two strips of different batches of the same brand, same size, provided reliable separation of the parties.

5.1.2. On the outer turn of the roll of tape and labeled with the indication of the trademark of the manufacturer, weight of steel coil, steel grade, batch number, size and magnetic properties of steel.

A bunch of rolls of tape label is put on the outer turn of each coil and an inner coil of extreme rolls. Allowed a lot of roll to indicate on the packaging.

5.1.1, 5.1.2. (Changed edition, Rev. N 5).

5.1.3. The mass of steel in the packaging must be not less than 50 kg and not more than 5.0 t

By agreement between manufacturer and consumer may increase the mass of steel in the packaging in accordance with GOST 7566.

5.2. Coils and bundles of leaves are Packed in containers, providing safety of products in accordance with normative-technical documentation.

5.3. Rental transporterowych by all kinds of transport in accordance with cargo carriage regulations applicable to transport of this species.

Transport of steel by rail is carried out in covered wagons, platforms or open wagons with all types of shipments.

(Changed edition, Rev. N 5).

5.4. Rental in unopened manufacturer’s packaging must be stored in covered storage areas to prevent direct contact with moisture.

(Added, Rev. N 5).

ANNEX 1a (informative)

ANNEX 1a
Reference

Steel grade	Thickness, mm	Specific magnetic loss W/kg, not more	Magnetic induction, T, not less, in magnetic field, A/m
1000	5000	10000
2421	0,27	10,7	1,35	1.55 V	1,65
2414	0,50	1,10	1,35	1,60	1,70
2413	0,50	-	1,35	1,60	1,70
0,35	-	1,35	1,60	1,70
2412	0,50	1,3	1,35	1,60	1,70
0,35	1,15	1,35	1,60	1,70
2411	0,50	1,6	1,37	1,60	1,73
0,35	1,3	1,37	1,60	1,70
2312	0,50	1,70	1,40	1,66	1,74
2216	0,50	1,75	1,43	1,68	1,76
2215	0,50	2,0	1,53	1,72	1,80
2214	0,50	2,2	1,50	1,70	1,78
2213	0,50	2,5	1.52 m	1,74	Of 1.82
2212	0,50	2,2	1,42	1,68	1,77
2211	0,50	2,5	1,40	1,65	1,76
2112	0,50	2,6	1,44	1,70	1,77
2111	0,50	3,0	1,46	1,68	1,78
2013	0,50	2,8	1,54	1,72	Of 1.82
2012	0,50	3,1	1.52 m	1,70	1,80
2011	0,50	3,5	1,49	1,68	1,78

ANNEX 1A. (Added, Rev. N 5).

APPENDIX 1. (Deleted, Rev. N 5).

ANNEX 2 (informative)

ANNEX 2
Reference

Steel grade	The sum of mass fraction of alloying (silicon and aluminium), %	Density, kg/m	Electrical resistivity, Ohm·mm/m
2421	SV. 2.8 to 3.8 incl.	7600	0,50
2414, 2413, 2412, 2411	«The 2.5» and 3.8 «	7600	0,50
2312	«1,8» 2,8 «	7700	0,40
2211, 2212, 2213, 2214, 2215, 2216	«To 0.8» to 2.1 «	7750	0,25
2111, 2112	«0,5» 0,8 «	7800	0,17
2011, 2012, 2013	0.5 incl.	7820	0,14

Note. Chemical composition and density of steel are not standardized, given as reference characteristics in the calculation of magnetic properties.


(Changed edition, Rev. N 5).

ANNEX 3 (required)

APPENDIX 3
Mandatory

Compliance vintage assortment GOST 21427.2−83 ST SEV 101−85 given in table.1.

Table 1

GOST 21427.2−83		ST SEV 101−85
Steel grade	Thickness, mm	Category rental
2111	0,65	1000−65−4
2112	0,65	800−65−4
2211	0,65	700−65−4
2212	0,65	630−65−4
2312	0,65	560−65−4
2111	0,50	800−50−4
-	700−50−4
2112	0,50	600−50−4
2211	0,50	580−50−4
2212	0,50	500−50−4
2311	0,50	440−50−4
2312	0,50	400−50−4
2411	0,50	360−50−4
2412	0,50	310−50−4
2413	0,50	290−50−4
2414	0,50	270−50−4
-	330−35−4
2411	0,35	300−35−4
2412	0,35	270−35−4
2413	0,35	250−35−4
2111	0,65	1000−65−5
2112	0,65	800−65−5
2211	0,65	700−65−5
2212	0,65	630−65−5
2312	0,65	560−65−5
2111	0,50	800−50−5
2211	0,50	580−50−5
2212	0,50	500−50−5
2311	0,50	440−50−5
2312	0,50	400−50−5
-	1000−65−6
2011	0,65	-
2012	0,65	800−65−6
2013	0,65	700−65−6
2011	0,50	800−65*-6
_______________ * Consistent with the original. — Note the CODE.
2012	0,50	650−50−6
2013	0,50	560−50−6
2014	0,50	500−50−6

Compliance with the requirements of GOST 21427.2−83 ST SEV 101−85 given in table.2.

Table 2

GOST 21427.2−83		ST SEV 101−85
Item	Content requirements	Item	Content requirements
1.14	More stringent requirements telescopically rolls with a width of 500 mm and above:	2.12
not more than 7 mm	Not more than 10 mm
2.10. Table.10	Establishes more stringent requirements for the ageing factor for steel with a mass fraction of silicon in excess of 1.8%.	3.7. Table.11
The ageing factor, %: no more than 4	No more than 6
2.8. Table.9	Sets more stringent requirements as part of the rules of magnetic induction	3.6. Table.8, 9, 10

APPENDIX 3. (Added, Rev. N 2).



The electronic text of the document
prepared by JSC «Code» and checked by:
the official publication of the
Electrotechnical steel. Specifications.
Methods of analysis: Sat. Standards. -
M.: IPK Publishing house of standards, 2003