GOST 32482-2013
GOST 32482−2013 cold rolled anisotropic electrical steel for transformers. Specifications
GOST 32482−2013
Group NEQ
INTERSTATE STANDARD
COLD ROLLED ANISOTROPIC ELECTRICAL STEEL FOR TRANSFORMERS
Specifications
Gold-rolled grain-oriented electrical steel sheet and strip for transformer.
Specifications
ISS 77.140.40
77.140.50
Date of introduction-2015−03−01
Preface
Goals, basic principles and main procedure of works on interstate standardization have been established in GOST 1.0−92 «interstate standardization system. Basic provisions» and GOST 1.2−2009 «interstate standardization system. Interstate standards, rules and recommendations on interstate standardization. Rules of development, adoption, application, renewal and cancellation"
Data on standard
1 PREPARED by the Technical Committee for standardization TC 375 «steel Products from ferrous metals and alloys», Open joint stock company «Novolipetsk steel» (OJSC «NLMK»), a limited liability company «Charlestongirl Certification».
2 recorded by the Interstate technical Committee MTC 120 «Steel, cast iron, rolled"
3 ACCEPTED by the Interstate Council for standardization, Metrology and certification (Protocol dated November 14, 2013 # 44−2013)
The adoption voted:
| Short name of the country on MK (ISO 3166) 004−97 |
Country code MK (ISO 3166) 004−97 |
Abbreviated name of the national authority for standardization |
| Belarus |
BY |
Gosstandart Of The Republic Of Belarus |
| Kyrgyzstan |
KG |
Kyrgyzstandard |
| Tajikistan |
TJ |
Tajikstandart |
| Uzbekistan |
UZ |
The Agency Uzstandard |
| Russia |
EN |
Rosstandart |
4 this standard conforms to the following international and European regional standards:
IEC 60404−8-7:98* Specifications for individual materials — Cold rolled grain-oriented electrical steel sheet and strip delivered in the fully-processed state (specifications for individual materials. Textured cold-rolled sheets and strips, electrical steel supplied in finished form)
EN 10107:2005 Grain-oriented electrical steel sheet and strip delivered in the fully processed state (a Thin sheet and strip of electrical steel with oriented grain delivered in the fully processed state).
The degree of compliance — non-equivalent (NEQ).
The standard is based on the application of GOST R 53934−2010
5 by Order of the Federal Agency for technical regulation and Metrology dated 13 October 2014 N 1317-St inter-state standard GOST 32482−2013 introduced as a national standard of the Russian Federation from March 1, 2015
6 INTRODUCED FOR THE FIRST TIME
Information about the changes to this standard is published in the annual reference index «National standards», and the text changes and amendments — in monthly information index «National standards». In case of revision (replacement) or cancellation of this standard a notification will be published in the monthly information index «National standards». Relevant information, notification and lyrics are also posted in the information system of General use — on the official website of the Federal Agency for technical regulation and Metrology on the Internet
1 Scope
This standard applies to cold-rolled steel sheet nominal thickness of 0.23; 0,27; 0,30; 0.35 and 0.50 mm of electrotechnical anisotropic steel, intended for the manufacture of magnetic cores (cores) of various kinds of electrical devices.
2 Normative references
This standard uses the regulatory references to the following standards:
GOST R ISO 10002−2007 Management. Customer satisfaction. A guide to claims management in organizations
GOST 427−75 Rulers measuring metal. Specifications
GOST 4381−87 Micrometers lever. General specifications
GOST 6507−90 Micrometers. Specifications
GOST 7566−94 metal Products. Acceptance, marking, packing, transportation and storage
GOST 12119.4−98 electrotechnical Steel. Methods for determining magnetic and electrical properties. Method of measurement of specific magnetic losses and actual value of magnetic field intensity
GOST 12119.5−98 electrotechnical Steel. Methods for determining magnetic and electrical properties. Method of measurement of magnetic induction amplitudes and magnetic field
GOST 12119.8−98 electrotechnical Steel. Methods for determining magnetic and electrical properties. Method of measurement of resistance ratio of insulating coating.
GOST 21014−88 ferrous metals. Terms and definitions of defects
GOST 26877−91 metal Products. Methods of measuring form deviations of
Note — When using this standard appropriate to test the effect of reference standards for the sign «National standards» drawn up as of January 1 of the current year and related information signs, published in the current year. If the reference standard is replaced (changed), when using this standard should be guided by replacing (amended) standard. If the reference standard is cancelled without replacement, then the situation in which the given link applies to the extent that does not affect this link.
3 Terms and definitions
This standard applies the following terms with respective definitions:
3.1 magnetic induction , T: the measure of the magnetization of the ferromagnetic sample placed in an external magnetic field strength
(A/m).
Magnetic induction and field intensity are connected by the relation:
where is magnetic permeability, o. e;
— magnetic constant, equal to
3.2 magnetic losses , W: of the power of the magnetic field by the sample magnetic material and dissipated as heat when exposed to the material changing in time of the electromagnetic field.
3.3 specific magnetic losses in W/kg: Magnetic losses per unit mass of magnetic material.
Loss is determined at specified frequency electromagnetic fields and magnetic induction generated by the field in the magnetic core.
Rental certificate at frequency of 50 Hz and at the induction of 1.7 Tesla (with plate thickness of 0,23; or 0.27; 0.30; 0.35 mm) or for induction of 1.5 Tesla (with plate thickness of 0.50 mm).
3.4 thickness variation: Deviation form, characterized by the unevenness of thickness of steel products or parts according to width or length (GOST 26877).
3.5 camber: the deviation of the shape in which the edges of the sheet or strip in a horizontal plane have the shape of an arc (GOST 26877).
3.6 flatness: Deviation from flatness, in which the surface of metal products or individual parts have the form of alternating convexities or concavities, forming at least two peaks of individual waves, not provided for in the form of rental (GOST 26877).
3.7 plasticity: Repetitive bending at 90° in opposite directions flat sample, one end of which is secured in the fixture, consisting of jaws a specified size. Number of bends without breaking characterizes the ductility of the material.
3.8 internal (residual) stresses: Stresses at the box office, which may be partially preserved after heat treatment. These voltages are called internal or residual. Internal tension characterizes the maximum gap in the cut line.
3.9 curvature: Deviation from straightness, in which not all of the point lying on the geometrical axis of the steel, are equidistant from the horizontal or vertical plane in the longitudinal direction (GOST 26877).
3.10 fill factor: the Ratio of the theoretical volume filled with metal, determined based on weight and density, to the actual volume received after compression at a given load set (package) of leaves.
3.11 the ratio of the resistance of the insulation coating: the Effective resistivity of a single layer insulation tested between the overlaid metal contacts and the base metal of the isolated test sample.
3.12 Burr: defect of a surface, representing sharp, a ridge, a ledge formed when cutting metal (GOST 21014).
3.13 ageing: an Indicator used in relation to electrical steel to assess the degree of deterioration of its magnetic properties over a specified (long) or relatively small period of time with increase in temperature.
3.14 coating adhesion: the adhesion strength of the insulating coating to the surface of the metallic base rental.
4 Terms of the order
When ordering you must specify the following information.
4.1 Basic:
mark (designation) steel.
— the designation of this standard;
— type of steel (coil, sheet, strip);
— nominal dimensions;
— mass;
— volume of required tests and appropriate test certificate.
4.2 Additional:
— limit deviations of dimensions;
— requirements for residual curvature;
-type insulating coating;
— the minimum resistance ratio of insulating coating;
— requirements malostonski and heat resistance of the coating;
alternative test methods specifications and the contents of the document of the test results;
— temperature testing;
— additional test methods specifications and the contents of the document of the test results;
marked rental.
In the absence of additional requirements to rent must correspond to the main specifications of this standard.
5 Classification and designation
5.1 rentals are divided as follows:
— by product:
roll;
the sheet is roll cut into predetermined lengths;
tape — roll, spread on strips of certain width;
according to the method of production (rolling), structural state of steel:
T — rolled steel cold-rolled electrical anisotropic steel;
— the width requirements for rental:
SSH — standard width (manufacturer);
GSH — width, ready-to-use with extreme deviations in width:
ГШ1 — negative;
ГШ2 — positive;
— according to the requirements of magnetic properties into classes:
S — usual quality;
R — high magnetic induction;
D — optimized domain structure (for example, laser surface treatment of hire);
— types of coverage:
with a heat-resistant insulating inorganic coating — FLOOR;
with heat-resistant and nurture semi-organic insulating coating that improves stanoevski — TSH.
5.2 Marking stamps
The designation marks consists of letters and numbers arranged in a sequence, for example: T124−30S,
where:
— the letter T — rolled cold-rolled anisotropic
three (or two) digits after the T — factor, the normalized maximum value of the specific magnetic loss for alternating magnetization;
two digits (with a hyphen) is one hundred times the nominal thickness of the rolling, mm;
— S; R; D — a letter grade of steel.
6 Assortment
Rentals are made in the form of coils, sheets and strips (cut from coils) of a thickness of 0,23; 0,27; 0,30; 0,35; 0,50 mm .
Maximum deviations in thickness of the hire shall not exceed: ±0.020 mm — if the nominal plate thickness of 0,23; 0,27; 0,30 mm and ±0.025 mm — with a nominal thickness of 0,35; 0,50 mm.
The thickness variation across the width should be no more than 0,020 mm.
The variable thickness along the length measured along the longitudinal axis of the rental, should be no more than 0,020 mm.
6.2 the hire supply a standard width of the manufacturer (SSH):
— coil and sheet-920, 940, 960, 980, 1000 and 1200 mm;
feed — 90, 170, 180, 190, 200, 240, 250, 300, 325, 360, 400, 465 and 500 mm.
Rental, including pieces of tape, put the standard width of the manufacturer or width, ready to use (GSH), as agreed with the manufacturer.
6.3 tolerances for standard width coils and sheets should be no more than +2mm.
For coil, sheet and strips, ready to use, maximum deviations must meet the requirements specified in table 1.
Table 1 — tolerances for width
| Nominal width, mm |
ГШ1 limit deviation, mm |
| To 150 incl. |
0−0,2 |
| SV.150 to 400 incl. |
0−0,3 |
| SV.400 to 750 incl. |
0−0,5 |
| SV.750 |
0−0,6 |
| Note — By agreement with the client with the manufacturer products can be manufactured with specified positive values of limit deviations nominal width (ГШ2). | |
6.4 the Sheets are put with a length of 1500 mm. By agreement with the client and the manufacturer is allowed to produce sheets of a different size.
6.4.1 maximum deviations along the length of the sheets should be no more than +0,5%.
6.5 Coils, sheets and tape supplied with obraznymi edges.
6.6 When winding the strip in the coil and the tape should be fairly tight to avoid deformation of the rolls under its own weight when lifting the bracket and mount on the horizontal axis.
The coils can have welded seams, but welded. The permissible number of welds and their labeling agree with the request and (or) when ordering.
Coils with welded joints shall consist of steel of the same brand and same size.
6.7 Camber of hire should not exceed 0.5 mm and length 1.0 m.
6.8 Deviation from flatness shall not exceed 1.5%.
6.9 the definition of the curvature are for the rental of a width exceeding 150 mm. Requirements to the magnitude of the residual curvature agreed when ordering.
6.10 the height of the Burr on the edges of the rent should not exceed 0,015 mm. the height of the Burr is determined to rent the supplied width, ready to use.
Examples of symbols:
Rolled sheet in coil standard width (SSH) with a thickness of 0.27 mm, a width of 1000 mm of steel grade T120−27S:
Roll SSH-0,271000-T120−27S GOST 32482−2013
The thing rolled in wide sheets, ready to use (ГШ1), 0.30 mm thick, of a width of 600 mm of steel grade T100−30P:
Sheet GS 1−0,30600-T100-З0Р
Tape standard width (SSH) with a thickness of 0.23 mm, a width of 300 mm of steel grade T105−23D:
The tape SSH-0,23300-T105−23D
7 Technical requirements
Rental supply in accordance with the requirements of this standard and of the order according to the technical documentation, duly approved.
7.1 General requirements
7.1.1 Method of smelting, the chemical composition of steel and manufacturing technology of the rental is defined by the manufacturer in accordance with the approved engineering documentation.
Usually use silicon steel with a mass fraction of silicon from 2.8% to 3.8%.
If changes in the production of steel may lead to changing technical and/or technological characteristics of the rental at the end user, the manufacturer of the rental, you should notify the buyer until delivery.
7.1.2 rental supply in the heat-treated condition.
Hire and glassware hire with optimized domain structure should not be heat treated.
7.1.3 cold-rolled steel supplied with double-sided heat-resistant inorganic insulating coating (FLOOR) or two-way and nurture semi-organic insulating heat-resistant coating that improves stanoevski (TSH).
Note — At the customer’s request bars can be supplied with coatings of other types. Type of coverage and requirements established by agreement between manufacturer and consumer rental.
7.1.4 rental in the state of delivery must have a surface without captured, bubbles, rust, holes and cracks. Allowed individual scratches, udivleny and other minor defects, provided they do not derive a rental for the limit deviation on thickness.
7.2 Magnetic and technological properties
7.2.1 Magnetic properties and the fill factor of rent in the state of delivery must conform to the standards specified in table 2.
Table 2 — Magnetic and technological properties rental
| Mark (designation) steel | Nominal thickness, mm | Magnetic properties |
A fill factor of not less than | |
Specific magnetic losses |
Magnetic induction |
|||
| Hire normal-quality | ||||
| T110−23S | 0,23 | 1,10 |
1,85 |
0,945 |
| T120−23S | 1,20 |
1,83 |
0,945 | |
| T127−23S | 1,27 |
Of 1.82 |
0,945 | |
| T105−27S | 0,27 | 1,05 |
1,87 |
0,950 |
| T110−27S | 1,10 |
1,86 |
0,950 | |
| T120−27S | 1,20 |
1,84 |
0,950 | |
| T130−27S | 1,30 |
1,83 |
0,950 | |
| T140−27S | 1,40 |
Of 1.82 |
0,950 | |
| T111−30S | 0,30 | 1,11 |
1,87 |
0,955 |
| T120−30S | 1,20 |
1,86 |
0,955 | |
| T130−30S | 1,30 |
1,84 |
0,955 | |
| T140−30S | 1,40 |
Of 1.82 |
0,955 | |
| T120−35S | 0,35 | 1,20 |
1,86 |
Oil 0.960 |
| T130−35S | 1,30 |
1,83 |
Oil 0.960 | |
| T145−35S | 1,45 |
1,81 |
Oil 0.960 | |
| T150−50S | 0,50 | 1,50" |
1,88" |
Of 0.965 |
| T175−50S | A 1.75" |
1,85" |
Of 0.965 | |
| The steel with high magnetic induction | ||||
| T90−27R | 0,27 | 0,90 |
Of 1.88 |
0,950 |
| T95−27R | 0,95 |
Of 1.88 |
0,950 | |
| Т103−27R | 1,03 |
Of 1.88 |
0,950 | |
| T100−30P | 0,30 | Of 1.00 |
Of 1.88 |
0,955 |
| T105−30R | 1,05 |
Of 1.88 |
0,955 | |
| Т111−30R | 1,11 |
Of 1.88 |
0,955 | |
| Rental with optimized domain structure | ||||
| T95−23D | 0,23 | 0,95 |
1,87 |
0,945 |
| T100−23D | Of 1.00 |
1,86 |
0,945 | |
| T105−23D | 1,05 |
1,85 |
0,945 | |
| T95−27D | 0,27 | 0,95 |
1,87 |
0,950 |
| T100−27D | Of 1.00 |
1,86 |
0,950 | |
| T105−27D | 1,05 |
1,85 |
0,950 | |
| T100−30D | 0,30 | Of 1.00 |
1,87 |
0,955 |
| T105−30D | 1,05 |
1,86 |
0,955 | |
| T110−30D | 1,10 |
1,85 |
0,955 | |
| ||||
| Notes 1 Testing magnetic properties rental of ordinary quality and of high magnetic induction is carried out on samples of Epstein. When testing the magnetic properties of the rolled sheet level of specific losses agreed between the customer and the manufacturer. 2 Testing the magnetic properties of the steel are optimized domain structure is carried out in the sheet. | ||||
; 
in W/kg, not more
, t, not less
, 
at a thickness of 0.5 mm.7.2.2 Plasticity of hire must ensure that the number of kinks of the individual samples of at least one. The arithmetic mean value of the number of bends shall be not less than four.
7.2.3 Internal stresses determined for the production of a width exceeding 500 mm Maximum clearance between the cutting lines, which characterizes the magnitude of internal stresses, should be no more than 1 mm.
7.2.4 Coefficient of resistance electrical insulating inorganic coatings (ET) must be less than 10 Ohmcm
on each side for double-sided coating.
Insulating inorganic coating must retain insulating properties when heated to 840 °C for 3 h in neutral atmosphere or after aging at a temperature of (820±10) °C for 3 min in air, and also to be neutral to transformer oil at 100 °C and oil-resistant at 150 °C .
Testing of electrical insulating inorganic coatings on the neutral to the transformer oil and the oil resistant is carried out at the request of the customer according to the agreed between the manufacturer and the customer methodology.
7.2.5 the value of the coefficient of resistance and nurture semi-organic insulating coating (TS) should be at least 1.0 Ohmcm
for double-sided coating.
Nurture semi-organic insulating coating should improve stanoevski rental, to maintain insulating properties when heated to 700 °C for 2 h in neutral atmosphere or for 2 minutes in the air, and to be neutral to transformer oil at 100 °C, oil resistant — 150 °C.
Test and nurture semi-organic insulating coating of the neutral to the transformer oil and the oil resistant is carried out at the request of the customer according to the agreed between the manufacturer and the customer methodology.
7.2.6 manufacturer In agreement with the customer the value of the coefficient of resistance insulation coating can be regulated.
7.2.7 electrically Insulating coating of hire should not be peeling when cutting or heat treatment of steel.
In the testing and evaluation of adhesion on the outer surface of the sample cracks and delamination are not allowed.
Allowed eye noticeable light exfoliation and cracks on the inner surface of the straightening of the specimen after bending.
7.2.8 Coefficient of aging on specific losses should not exceed 2%.
In case of exceeding the norms in the coefficient aging rental otestovat mark corresponding to the level of specific magnetic losses, obtained on samples after aging.
7.2.9 the sheet and tape apply the results of the test roll, of which was cutting.
7.3 Specific magnetic losses 
are given in table A. 1 (Appendix A).
7.4 Specific magnetic losses 
8 Rules of acceptance
8.1. General rules of acceptance GOST 7566.
8.2 rental take parties. For the party taking single coil, same brand same size.
8.3 Sampling for tests carried out from the beginning and end of each unit of production (batch).
External and the last internal round of think packaging and are not intended for sampling.
This test is used for testing of the rental, subject to applicable order when tested.
The tape and sheets obtained by cutting the roll to a predetermined width and length, such as one roll.
8.4 Certification control the size, thickness variation, deviation from flatness, camber, surface condition and edges, the magnetic properties, the quality of the coating manufacturer spends on each party.
8.5 Periodic monitoring of fill factor and sound insulating properties of the coating, curvature, internal stress, plasticity, aging the manufacturer holds no less than ten parties per quarter.
If unsatisfactory test results are transferred to qualification tests to get a positive result for three parties in a row.
8.6 If you change the basic formulations or methods of applying electrical-insulating heat-resistant coatings carried out standard tests of neutrality to transformer oil and malostonski on a single coil according to the agreed between the manufacturer and the customer methodology.
8.7 If unsatisfactory test results of at least one of the indicators of re-examination it is carried out according to GOST 7566.
9 test Methods
9.1 Preparation of samples
9.1.1 Dimensions and limit deviations
To determine the thickness, width, length, longitudinal and transverse thickness variation, deviation from flatness, camber of a roll (batch) select from the beginning and the end of the same segment of length from 1500 to 2000 mm along the direction of rolling.
The sample for measurement of the curvature consists of one cut strip roll length 
9.1.2 Magnetic properties
Samples for the determination of the magnetic properties of the Epstein apparatus are manufactured from strips of a length of from 280 to 305 mm, width (30,0±0,2) mm. Strips should not differ from each other in length by more than ±0,2%. The number of stripes in the sample must be a multiple of four, the minimum number of bands is twelve.
The strips are cut along the direction of rolling. The angle between the direction of rolling and cutting of strips should not exceed 1°.
The edge strips of the sheets rolled in sample not included.
9.1.2.1 samples before the determination of the magnetic properties should be subjected to annealing for stress relieving.
Annealing modes:
— continuous furnace:
With arbitrary heating rate to a temperature of 800 °C — 850 °C, exposure at this temperature for at least 1.5 min. Annealing is carried out in basicsliderui protective atmosphere. Allowed to conduct annealing in air aged from 1.5 to 3 min. the Strips are annealed individually, without overlapping one another.
— for the charging of the furnace:
Heating to a temperature of 800 °C — 850 °C in a protective atmosphere, preventing from oxidation, exposure for 1 h, cooling with the furnace to 300 °C, then in air. The cooling rate is not more than 50 °C/h.
The annealing is carried out with a stack of strips.
When the modes of annealing mentioned above, the heterogeneity of temperature distribution along the length of the sample should be no more than 10 °C.
9.1.2.2 Leaf samples for testing in the leaf apparatus is made with a length of 400 mm. до750 sheet Length shall not be less than the outer length of the yoke (device); sheet width — not less than 60% of the window width of the solenoid (device). Maximum deviations along the length should not go beyond ±0,5%, width ±2 mm (GOST 12119.4).
9.1.3 Technological properties
9.1.3.1 the fill Factor is determined on a sample composed of 100 selected to determine the magnetic properties of the stripe, which before the test, remove the burrs.
9.1.3.2 To determine the number of excesses of party rental experience, four samples (two from the beginning and the end).
Samples with a minimum width of 20 mm should be selected outside of the welding and edge zones parallel to the direction of rolling so that the axis of the bending was in the direction of rolling. Samples should be cut with no visible burrs. Samples subjected to further heat treatment.
9.1.3.3 For determination of internal stresses for party rental experience for two samples (beginning and end of the roll).
The sample length from 1000 to 1500 mm and a width equal to the width of the roll, cut into two parts in the direction of rolling around the middle of the strip width.
9.1.3.4 For determining the coefficient of resistance of insulation coating from each roll (party) select and test two samples (beginning and end).
9.1.3.5 For evaluation of adhesion (the adhesive strength of the insulating coating to the metal) of each roll (party) select and test two samples (beginning and end), cut along the direction of rolling a length of from 280 to 305 mm and width 30 mm.
9.2 Methods of control and testing
Performance testing of the rental should be carried out at a temperature of (23±5) °C, when ordering, if not specified other conditions.
9.2.1 Control of dimensions, limit deviations and shape of the rolled
9.2.1.1 the size of the rental check of the measuring instruments: thickness — a micrometer according to GOST 6507 or GOST 4381, the width of the metal ruler according to GOST 427или other measurement means appropriate accuracy.
9.2.1.2 Average actual thickness of the hire is determined by the measurement results of the sample length from 1000 to 1500 mm at four points located on each side of the middle of the sample at a distance of not less than 20 mm from the edges.
9.2.1.3 Lateral thickness variation is determined on a product of a width exceeding 150 mm in the four points located at the two edges across the direction of rolling at a minimum distance of 15 mm from the edge of the rental.
9.2.1.4 Longitudinal thickness variation is determined in the direction of rolling at six points located on each side of the middle of the sample at a distance of not less than 15 mm from the edge of the rental.
9.2.1.5 Width measured across the longitudinal axis of the rental.
Maximum deviation in width is the maximum deviation of width from nominal.
9.2.1.6 Monitoring deviations from flatness, camber, curvature is carried out according to GOST 26877.
9.2.1.7 the Determination of deviation from flatness of conduct in the rental of a width exceeding 150 mm in the direction of rolling.
9.2.1.8 the definition of the curvature is carried out on a sample length of 500 mm and a width equal to the width of the rolled, cut in direction of rolling. The definition of the curvature are for the rental of a width exceeding 150 mm.
9.2.1.9 the height of the Burr on the edge of the rental is defined as the difference of sample measurements at the edge and at a distance of 10 mm from the edge.
9.2.2 Control surface is carried out visually without the use of magnifying devices.
9.2.3 Magnetic properties
9.2.3.1 Measurements of magnetic induction and of specific magnetic losses in the apparatus Epstein is carried out in accordance with the requirements of GOST 12119.4, GOST 12119.5. The measurements of the density of steel is taken as equal to 7650 kg/m.
At the request of customers allowed to conduct measurements with the use of foreign standards-analogues for these tests.
9.2.3.2 Measurement of the magnetic properties on the leaf apparatus is carried out in accordance with GOST 12119.4.
As attestation values using the worst test results obtained when testing samples of hire, selected from the beginning and end of the roll — lot (unit).
Carrying out measurements using other standards-analogues in accordance with the requirements of consumers.
Specific magnetic losses in the apparatus Epstein and the leaf apparatus is determined at a current frequency of 50 Hz (
9.2.3.3 rental with optimized domain structure the measurement of magnetic properties is carried out only in the leaf apparatus.
9.2.3.4 To define ageing coefficient sample Epstein after determining the magnetic properties is subjected to annealing regime: heating to 225 °C, exposure 24 h, and then cooled to room temperature. After annealing is again carried out measurement of specific magnetic losses. The tendency of the steel to aging is evaluated by the coefficient of aging , %, by formula
where and
is the specific magnetic losses before and after aging, respectively. Testing began on the aging is carried out selectively for 10 batches per quarter.
9.2.4 Technological properties
9.2.4.1 the fill Factor
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 of 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 is equal to 7650 kg/m
.
Test hire selectively conduct 10 batches per quarter.
9.2.4.2 Number of kinks
The test is performed using the device for the test strip at the bend with a radius of curvature of the jaws 5 mm at a temperature of from 15 °C to 35 °C.
During the test shall be provided with a permanent adhesion of the sample to the surface of the sponges.
One bend from the starting position at 90° and back to original position consider number of bend 1.
Test is interrupted at the first appearance of cracks, visible to the naked eye, on the base material. The obtained values of the number of bends are rounded to the nearest whole number.
As the attestation result to use the average value for the four samples.
9.2.4.3 Internal voltage
The sample length from 1000 to 1500 mm and a width equal to the width of the roll, cut into two parts in the direction of rolling around the middle of the strip width. The two parts join along the line of the cut flat plate and carry a maximum clearance dimension between the cutting lines, which characterizes the magnitude of internal stresses.
Proficiency tests carried out selectively at 10 parties in a month.
9.2.4.4 Coefficient of resistance insulation coating
Measurement of current and resistance coefficient of the coating is carried out on deletecontacts the installation of Franklin in accordance with GOST 12119.8.
Current measurements performed on two samples at two sites on each side of the samples, i.e. eight times.
According to the measurement results calculate the following parameters: the average amperage on the bottom of the strip, the average amperage to the top of the strip, the average current on both sides.
Coefficient of resistance , Ohm
cm
, on both sides of the sample is calculated by the formula
where — the total area of the contact surfaces of the electrodes, cm
;
— arithmetic mean value of results of measuring the amperage on both sides, A.
Coefficient of resistance , Ohm
— cm
, one side of the specimen is calculated by the formula
where — the total area of the contact surfaces of the electrodes, cm
;
— arithmetic mean value of results of measuring the amperage on the side of dimension A.
9.2.4.5 Adhesion of the insulation surface
To assess the adhesion of a coating sample is pressed against the rod 20 mm in diameter and smoothly bent 90° around the web.
The condition of the coating after bending the samples visually checked for cracks and delaminations.
10 Marking and packing
10.1 Labeling and packaging — according to GOST 7566 with the following additions.
10.2 Each roll must have a manufacturer’s label of the established sample with clear information.
10.3 Label that contains information about the coil should be located:
— on the inner side of the roll;
on the outside of the roll;
— the external protective packaging (if using).
10.4 the labels of a roll or stack of sheets indicate the trademark of the manufacturer, the melting number, batch number, and size of rental.
On the label of the protective outer package additionally represent the brand of rental.
10.5 Bulk rolls or packs of sheets should not be more than 5.0 t Maximum deviation of the weight must be 10 kg.
Bulk rolls or packs of sheets in the package and their sizes must meet the conditions for supply.
10.6 Packaging must be performed in accordance with the approved schemes and to protect the rental from mechanical damage and environmental influences during loading, transportation and storage.
11 Certification
11.1 the Manufacturer shall provide the customer with the goods delivery a quality certificate including information about the test results of each batch of rolled, confirming compliance with the specification on delivery.
11.2 At the request of the customer, the manufacturer must provide a safety certificate for a rental.
11.3 In agreement that the manufacturer provides to the customer immediately after delivery of the hire a certified report on the average values of magnetic losses, or other test results for each tested party.
12 Transportation and storage
12.1 General requirements transportation and storage — by GOST 7566 with the following additions.
12.2 rental transporterowych by all kinds of transport in accordance with cargo carriage regulations applicable to transport of this species.
Transport rental rail transport is carried out in covered wagons, platforms or open wagons in accordance with the rules of cargo transportation by rail.
12.3 hire in unopened manufacturer’s packaging must be stored in covered warehouses excluding ingress of moisture.
Maximum warranty period of storage without deterioration of consumer properties of the quality of the surface is 6 months.
13 Complaints
The manufacturer guarantees the rental of this standard, subject to the requirements of transportation and storage.
The customer must give the manufacturer the opportunity to verify the validity of claims, namely by providing rental, which filed the complaint, and documents.
The complaint filed in accordance with GOST R ISO 10002.
Annex a (informative). Specific magnetic losses P (1,7/60). Magnetic induction (100)
Appendix A
(reference)
Specific magnetic losses 
Table A. 1
| Mark |
Nominal thickness, mm |
Magnetic properties | |
Specific magnetic losses |
Magnetic induction | ||
| Hire normal-quality | |||
| T110−23S |
0,23 |
Of 1.31 |
1,72 |
| T120−23S |
1,57 |
1,70 | |
| T127−23S |
1,66 |
1,69 | |
| T105−27S |
0,27 |
1,38 |
1,72 |
| T110−27S |
Of 1.31 |
1,71 | |
| T120−27S |
1,57 |
1,68 | |
| T130−27S |
1,70 |
1,62 | |
| T140−27S |
1,83 |
Of 1.61 | |
| T111−30S |
0,30 |
1,45 |
1,72 |
| T120−30S |
1,57 |
1,71 | |
| T130−30S |
1,70 |
1,68 | |
| T140−30S |
1,83 |
1,62 | |
| T120−35S |
0,35 |
1,57 |
1,71 |
| T130−35S |
1,70 |
1,62 | |
| T145−35S |
1,90 |
1,60 | |
| T150−50S |
0,50 |
1,96" |
1,58 |
| T175−50S |
Of 2.29" |
1,58 | |
| The steel with high magnetic induction | |||
| T090−27P |
0,27 |
1,18 |
1,74 |
| T095−27P |
1,24 |
1,74 | |
| T103−27P |
1,35 |
1,74 | |
| T100−30P |
0,30 |
Of 1.31 |
1,74 |
| T105−30P |
1,38 |
1,74 | |
| T111−30P |
1,45 |
1,74 | |
| Rental with optimized domain structure | |||
| T095−23D |
0,23 |
1,24 |
1,72 |
| T100−23D |
Of 1.31 |
1,71 | |
| T105−23D |
1,38 |
1,69 | |
| T095−27D |
0,27 |
1,24 |
1,72 |
| T100−27D |
Of 1.31 |
1,71 | |
| T105−27D |
1,38 |
1,69 | |
| T100−30D |
0,30 |
Of 1.31 |
1,72 |
| T105−30D |
1,38 |
1,71 | |
| T110−30D |
Of 1.31 |
1,69 | |
| |||
| Note — When testing the magnetic properties at the leaf level of specific losses agreed between the customer and the manufacturer | |||
; 
in W/kg, not moreAnnex B (reference). Specific magnetic losses P (1,5/60), R (1,7/60) (W/kg) (W/lb)
Appendix B
(reference)
Specific magnetic losses 
B. 1 Specific magnetic losses 
By agreement between manufacturer and the customer value of specific magnetic losses 
B. 2 Private (internal, true) magnetization of the ferromagnetic sample, the magnetic polarization , T, can be calculated according to the formula
where is magnetic induction, T;
— magnetic constant, equal
— magnetic field strength, A/m.
The difference between the and
the measurements on the apparatus Epstein in a magnetic field of 800 A/m is up to 0.001 Tesla.
