1.9; 1.10; 1.12

5. Restriction of the validity of the Discontinued Protocol No. 7-95 of the Interstate Council on Standardization, Metrology and Certification (IUS 11-95)

6. Edition (September 2004) with changes in N 1, 2, 3, 4, approved in October 1978, November 1980, June 1987, June 1989 (IUS 11-78, 1-81 , 11-87, 11-89), amendment (IUS 2-2003)


Amended, published in JUS N 12, 2005

The amendment is made by the database manufacturer


This standard applies to steel hot-rolled with one-sided rhombic and leaning rifrance of general purpose sheets.

1. Sortiment

1. Sortiment

1.1a. Sheet rolling in thickness is manufactured:

high accuracy - a,

normal accuracy - V.

(Introduced additionally, meas. N 4).

1.1. Form, dimensions, limit deviations and a mass of 1 m sheet with rhombic and lentilicular riflation should correspond to the specified ones 1, 2 and in the table.

Tol- shan on leaf, mm

Limit deviations for sheet thickness with width, mm

Width bases of rifle , mm

Corner at top of rifle , hail

Rift length leu , mm

Radius sense rifle , mm

By arranging the plane of the rifle to the skost sheet, hail

Mass of 1 M. sheet, kg.

Prediction flax rend masseing,%

from 600. up to 1000.

cV. 1000. up to 1500.

sv. 1500. until 2000.

sv. 2000. up to 2200.

normal mal- naya exact nosta

high kaya. exact nosta

normal mal- naya exact nosta

high kaya. exact nosta

normal mal- naya exact nosta

high kaya. exact nosta

normal mal- naya exact nosta

high kaya. exact nosta

But- min.

Previous off

But- min.

Previous off

Rhombic rifrance

0,3 -0,7

0,3 -0,7

0,4 -0,8

0,4 -0,6

0,4 -0,8

0,5 -1,0

0,6 -1,1

Lental irrigation

0,3 -0,7

0,3 -0,7

0,4 -0,8

0,4 -0,8

0,4 -0,8

0,5 -1,0

0,6 -1,1

Notes:

1. The thickness of the sheets with one-sided rhombic and lentilicular riflation is determined by the thickness of the base of the sheet in millimeters.

2. For sheets rolled on mills of polystive rolling, in the middle part of the sheet width is allowed the base thickness of 0.2 mm above the plus limit deviation.

3. Base width of rifles , angle at the top of the rifle, diagonal rhombus, the angle of the arrangement of the rifle on the sheet plane, the distance between the rifles , Rifle's length , radius of rifle rounding On finished sheets are not controlled and are given for calculations in the manufacture of the instrument.

4. The mass of 1 M sheet is determined by the nominal sizes of sheets, height of rifles, equal to 0.2 sheet thickness, small diagonal of a rhombus equal to 27.5 mm, a larger diagonal of a rhombus equal to 65 mm. The density of steel is 7.85 g / cm.

5. (Excluded: N 4).


(Modified edition, meas. N 2, 3, 4, correction).

1.2. The corrugated rental is made in sheets and rolls with one-sided rhombic or lentilicular rifrance.

1.3. The height of the rifles on sheets should be 0.1-0.3 of the thickness of the sheet base, but not less than 0.5 mm. At the request of the consumer, the thickness of the base of 5 mm and more must have the height of the rifles of at least 1.0 mm.

(Modified edition, meas. N 2).

1.4. Rhombic rifer sheets are manufactured with diagonals of rhombus (25-30) x (60-70) mm. The configuration of the rifes and the location of large diagonals of the rhombus along or across the sheet is installed by the manufacturer.

At the request of the consumer, the manufacture of a sheet with another ratio of diagonals of rhombus is allowed.

(Modified edition, meas. N 2, 3).

1.5. Lesters with leafy of leafy rhyps are manufactured with a distance between the rifles 20, 25 and 30 mm.

1.6. The sheets are made of 600 to 2200 mm wide and a length of 1400 to 8000 mm with a gradation of 50 mm.

1.7. At the request of the consumer, the manufacture of sheets of other sizes is allowed.

(Modified edition, meas. N 3).

1.8. The size sheets are manufactured:

indicating the size of the thickness in accordance with the size specified in the table, and in width and length within the limits specified in p.1.6 - form I;

indicating the size of the thickness within the limits specified in the table, without specifying the size of the width and length - form II;

indicating the size, multiple in the width and length of the size specified by the consumer within the limits set in p.1.6 - Form III;

with the measurement dimensions within the limits specified in paragraph 1.6 - Form IV.

(Modified edition, meas. N 1).

1.9. Limit deviations along the length and width of sheets - according to GOST 19903.

At the request of the consumer, sheets and rolls are manufactured with utmost deviations;

+20 mm - in width for roll rolled steel over 1000 mm with unedged edge;

+15 mm - in length for a sheet of over 2000 to 6000 mm and over with a thickness of 4.0 and 5.0 mm;

+25 mm - with a thickness of 6.0; 8.0; 10.0 and 12.0 mm.

(Modified edition, meas. N 3, 4).

1.10. Deviations from flatness - according to GOST 19903 for normal and improved flatness.

(Modified edition, meas. N 4).

1.11. (Excluded, meas. N 1).

1.12. Requirements for the rental manufactured in rolls, as well as the size of rolls in width - according to GOST 19903, here and then in the text. - Note database manufacturer.

Liszing rhombus in K-PU-3,0х1000х2000 ST3SP GOST 8568-77

List of lentil in-K-PU-3,0х1000х2000 ST3SPGOST 8568-77

Rolled hot rolled rolled steel brand ST3SP according to GOST 380 with one-sided rhombic rifer size of 3.0x1000 mm, high accuracy, with rolled edge:

Roll Romble A-K-3,0x1000 St3p GOST 8568-77

The same, with lential one-sided corrugation:

Roll of lentil A-K-3,0х1000 ST3SPGOST 8568-77

(Modified edition, change. N 2, 3, 4).

2. Technical requirements

2.1. Sheets and rolls are manufactured in accordance with the requirements of this Standard for the Technological Regulations approved in the prescribed manner.

2.2. Sheets and rolls are made of carbon steel of ordinary grades of St0, ST1, ST2, and SB (boiling, calm and semi-luminous) with chemical composition according to GOST 380.

In coordination of the manufacturer with the consumer, it is allowed to manufacture sheet rental without rationing of chromium content, nickel, copper.

2.1, 2.2. (Modified edition, meas. N 4).

2.3. At the request of the consumer, the manufacture of sheets of steel of other brands is allowed.

(Modified edition, meas. N 3).

2.4. Sheets, laminated on the mills of polysty rolling, are trimmed from four sides.

2.5. Sheets and rolls, rolled on the mill continuous rolling, is allowed to supply with rolled longitudinal edges.

Available on the edges of the jar should not display a sheet for nominal size in width.

2.4, 2.5. (Modified edition, meas. N 1).

2.6. On the surface of the sheets there should be no rolling and dysfrection captivity, shells, sinks from scale, rolled bubbles, cracks and pollution. There should be no bundles on the edges of the sheets.

2.7. On the surface of the sheets are allowed ripples, scale, rust, prints, individual captures, the depth of which does not exceed the limit deviations in thickness.

3. Rules of acceptance

3.1. Sheets and rolls are accepted by parties. The party consists of a sheet of one type of rifrance. Part Definition - according to GOST 14637.

3.2. To control the size and quality of the surface, two sheets are selected or one roll.

3.3. Upon receipt of unsatisfactory control results, at least one of the indicators, re-control is carried out on a sample selected according to GOST 7566.

4. Test methods

4.1. Surface control is carried out without the use of magnifying devices.

4.2. The thickness of the base of sheets and the height of the rifes is measured at a distance of at least 100 mm from the corners and 40 mm from the edges.

Dimensions in any measured point should not withdraw sheet thickness for limit deviations.

4.3. The height of the rifles is determined as the difference in the size of the total thickness of the sheet and the thickness of the leaf base .

5. Marking, Packaging, Transportation and Storage

5.1. Marking, packaging, transportation and storage - according to GOST 7566.

(Modified edition, meas. N 3).



Electronic document text
prepared Codex JSC and drilled by:
official edition
M.: IPK Publishing standards, 2004

Editorial Document Taking into account
changes and additions prepared
JSC "Codex"

Is the main state standard that regulates the manufacture steel sheets with rhombic and lentic rifrance Made by hot deformation. This standard refers to both ordinary and stainless steel, so if you are interested in stainless sheets, this standard will be useful to you.

After reading this regulatory document, you will have an idea of \u200b\u200bthe assortment, technical requirements, acceptance rules, methods of tested by this type of metal. It can help you when choosing high-quality purchases.

Sortman

The first thing that is interested in the buyer is sizes. Contains a sort of sheets with rhombic and lentilicular rifrance. The following dimensions are available for release: Thick from 2.5 to 12 mm, width from 600 to 2200 mm, in length from 1400 to 8000 mm With a gradation of 50 mm. However, the manufacture of other sizes is allowed.

The leaf is corrugated differs from the usual presence of special protrusions on the surface. These protrusions have their technological purpose And precisely because of them, consumers also acquire this type of metal. However, some may not know how to distinguish the rhombic corrugation from lentil.

In practice, it is very simple: just look at the drawing of the textured surface.

• In the rhombic ripping, the convex lines are clearly visible on the surface, which are intersecting, form rhombid niches. These convex lines have clear boundaries, and they are continuous throughout the deina.
• In the case of lentilicular irrigation on the surface of the sheet, the protrusions are located in a certain way. They resemble small slides and are located at right angles to each other. These protrusions are short and more gentle.

Lists with leafy of leafy are most popular among buyers. They have a more pleasant appearance and therefore can be used to solve more tasks.

When buying it is important to take into account that the riflation is applied to the surface only on the one hand!

The standard regulates the following parameters for each sheet size: thickness, width, a mass of one square meter and deviations in size. Parameters such as the width of the base of the rifle, an angle at the top of the rifle, the length of the rifle, the radius of their rounding, and their location on the plane are indicated in the standard, but are not controlled. They are given as a reference material for the manufacture of tools.

The accuracy of the manufacture is available two options: high (letter A in marking) and normal accuracy (letter in marking). The difference between them consists in the amount of permissible deviations. For high precision products, they are significantly lower than for products of normal accuracy. Therefore, if such a parameter is important for your project as accuracy, it is recommended to purchase products category A.

You can get acquainted with the list of permissible size and corresponding limit deviations in the table below.

When measuring the thickness, it is important to know that the thickness of the sheet is considered to be the base of the sheet without taking into account the height of the ripple.

In case the product is made on polystate rolling mills, it is allowed to thicken its base in the middle part. This thickening should be no more than +0.2 mm of a plus limit deviation.

The mass of one square meter is calculated with a height of rifles, equal to 0.2 thickness, a small diagonal of a rhombus equal to 27.5 mm, a large diagonal of a rhombus equal to 65 mm n of the density of steel 7.85 g / cm3.

It is important to know that the corrugated rental with one-sided rifer is also produced in the form of rolls.

Sizes of rifrance

As for the height of rifles, then in the standard it is indicated that it should be within 0.1 - 0.3 thicknessbut not less than 0.5 mm. In case the consumer requires thick sheets (5 mm or more), it is allowed to increase the minimum height of the rifle to 1 mm, but only by agreement.

For sheets with rhombic rifer, the diagonal of the rhombus may have a length (25 - 30) x (60 - 70) mm., However, the manufacture of irrigation with other sizes in coordination is allowed. The location of large diagonals along or across the sheet is installed by the manufacturer.

For sheets with lentilicular riflation, the distance between the rifles can be 20, 25 or 30 mm.

Limit deviations

The limit deviations in the thickness of the sheet can be viewed in the table above, but there are no deviations in length and width. The standard indicates that they must be taken from GOST 19903 Hot-rolled sheet rolled. Deviations from the plane must be taken from the same standard for a normal and improved plane.

In case the rental is made in rolls, the requirements and size of rolls must be taken from GOST 19903.

Legend

Looking at the conventional designation at first it is difficult to disassemble that they denote all these letters and numbers. However, this is not as difficult as it seems at first glance.

• At the beginning there is a marking of the product. The type of product is indicated: a sheet or roll and a view of the rifrance.
• Next is the indication of the accuracy of manufacturing: a - high accuracy, in - normal.
• After that, the type of edge is indicated. K is a roller.
• Then go sizes: thickness x width x length (or thickness x width in case of roll)
• At the very end, the brand of steel and GOST.

Technical requirements

Sheets with rhombic and leafy rhyps are manufactured in accordance with the requirements of carbon steel or from steels of other brands.

In the manufacture of polystive rolling on the mill, the product is cut from four sides.

In the manufacture of continuous rolling, the presence of rolled longitudinal edges is allowed. If there are served on the edges, their value should not display the width of the sheet in the nominal dimensions.

Acceptance and testing

After the end of the production process comes time to take parties. The party must contain the rental of one type of ripple. That is, there can be no lentil in the rhombic sheets. Party definition must be taken from GOST 14637..

For the work of the necessary measurements from the party, one roll is taken or two sheets. If at least one unsatisfactory result is obtained in the process of determining the quality, the second test stage is performed. For this stage, the sample is performed according to GOST 7566.

Measurements for determining the thickness of the base and the height of the rifes are produced at a distance of at least 100 mm from the corners and 40 mm from the edges.

The height of the rifle is determined by subtracting the thickness of the sheet base from the total thickness.

Standard history

It was developed and introduced by the Ministry of Black Metallurgy of the USSR. April 13, 1977 was approved and commissioned by the State Committee of the Standards Council of Ministers of the USSR instead of GOST 8568-57.

After the collapse of the USSR, this standard was adopted in Russia. In 1995, the Interstate Council for Standardization, Metrology and Certificate was withdrawn from it a limitation of validity.

Notes:

1. The thickness of sheets with one-sided rhombic and lentilicular riflation is determined by the thickness of the base of the sheet S in millimeters.

2 for sheet rolling sheets, in the middle of the width of the sheet, the thickness of the base is allowed to be 0.2 mm above the plus limit deviation.

3. Base width of riflesb, angle at the top of the riflej, diagonal rhombust 1. + T 2, the angle of the arrangement of the rifle on the sheet planej 1, distance between the riflest, the length of the riflel, radius of rifle roundingR on finished sheets are not controlled and are given for calculations in the manufacture of the tool.

4. The mass of 1 m 2 of the sheet is determined by the nominal size of the sheets, the height of the rifles, equal to 0.2 sheet thicknesses, a small range diagonal of 27.5 mm, a larger diagonal of a rhombus equal to 65 mm. The density of steel is 7.85 g / cm 3.

1.2. The corrugated rental is made in sheets and rolls with one-sided rhombic or lentilicular rifrance.

1.3. The height of the rifles on sheets should be 0.2-0.3 thickness of the sheet base, but not less than 0.5 mm. At the request of the consumer, the sheet thickness sheets of 5 mm and more should have a height of rifles at least 1.0 mm.

1.4. Rhombic rifer sheets are manufactured with diagonals of rhombus (25-30) C (60-70) mm. The configuration of the rifes and the location of large diagonals of the rhombus along or across the sheet is installed by the manufacturer.

At the request of the consumer, the manufacture of a sheet with another ratio of diagonals of rhombus is allowed.

1.5. Lesters with leafy of leafy rhyps are manufactured with a distance between the rifles 20, 25 and 30 mm.

1.6. The sheets are made of 600 to 2200 mm wide and a length of 1400 to 8000 mm with a gradation of 50 mm.

1.7. At the request of the consumer, the manufacture of sheets of other sizes is allowed.

1.8. The size sheets are manufactured:

indicating the size of the thickness in accordance with the dimensions specified in the table, and in width and length within the limits specified in paragraph 1.6 - the form I;

indicating the size of the thickness within the limits specified in the table, without specifying the size of the width and length - form II;

indicating the size, multiple width and length of the size specified by the consumer within the limits set in paragraph 1.6 - Form III;

indicating measuring dimensions within the limits specified in paragraph 1.6 - Form IV.

1.9. Limit deviations along the length and width of sheets - according to GOST 19903-74.

At the request of the consumer, sheets and rolls are manufactured with utmost deviations:

20 mm - width for roll rolled over 1000 mm with unedged edge;

15 mm - in length for a sheet of over 2000 to 6000 mm and over with a thickness of 4.0 and 5.0 mm;

25 mm - with a thickness of 6.0; 8.0; 10.0 and 12.0 mm.

1.10. Deviations from flatness - according to GOST 19903-74 for normal and improved flatness.

1.11. (Excluded)

1.12. Requirements for steel manufactured in rolls, as well as the size of rolls in width - according to GOST 19903-74.

Examples of conventional designations

The hot-rolled sheet of steel brand ST3SP according to GOST 380-88 with one-sided rhombic rifer size of 3.0C1000C2000 mm, normal precision in thickness, improved flatness with rolled edge:

Rhombus leaf in-Pu-3.0C1000C2000 ST3SP GOST 8568-77

List of Chechens B.-K-PU-3,0C1000C2000 ST3SP GOST 8568-77

Rolled hot rolled rolled steel brand ST3SP according to GOST 380-88 with one-sided rhombic rifer size of 3.0C1000 mm, high accuracy, with rolled edge:

Roll Romb A.-K-3,0C1.000 ST3SP GOST 8568-77

The same, with lential one-sided corrugation:

Roll of lentil A.-K-3,0C1.000 ST3SP GOST 8568-77

2. Technical requirements

2.1. Sheets and rolls are manufactured in accordance with the requirements of this Standard for the Technological Regulations approved in the prescribed manner.

2.2. Sheets and rolls are made of carbon steel ordinary grades of St0, St1, St2 and St3 (boiling, calm and semi-luminous) with chemical composition according to GOST 380-88.

In coordination of the manufacturer with the consumer, it is allowed to manufacture sheet rental without rationing of chromium content, nickel, copper.

2.3. At the request of the consumer, the manufacture of sheets from the rental of other brands is allowed.

2.4. Sheets, rolling on mills of polystive rolling, are trimmed from four sides.

2.5. Sheets and rolls, rolled on the mill continuous rolling, is allowed to supply with rolled longitudinal edges.

Available on the edges of the jar should not display a sheet for nominal size in width.

2.6. On the surface of the sheets there should be no rolling and dysfrection captivity, shells, sinks from scale, rolled bubbles, cracks and pollution. There should be no bundles on the edges of the sheets.

2.7. On the surface of the sheets are allowed ripples, scale, rust, prints, individual captures, the depth of which does not exceed the limit deviations in thickness.

3. Rules of acceptance

3.1. Sheets and rolls are accepted by parties. The party consists of a sheet of one type of rifrance. Definition of the party according to GOST 14637-79.

3.2. To control the size and quality of the surface, two sheets are selected or one roll.

3.3. Upon receipt of unsatisfactory control results, at least one of the indicators, re-control is carried out on the sample selected according to GOST 7566-81.

4. Test methods

4.1. Surface control is made without the use of magnifying devices.

4.2. The thickness of the base of sheets and the height of the rifles is measured at a distance of at least 100 mm from the corners and 40 mm from the edges.

Dimensions in any measured point should not withdraw sheet thickness for limit deviations.

4.3. Height of rifle h. Determined as the difference in the size of the total sheet thickness s.+ h. and sheet bottom thickness s..

5. Marking, Packaging, Transportation and Storage

5.1. Marking, packaging, transportation and storage - according to GOST 7566-81.

GOST 8568-77

Interstate standard

Steel sheets with rhombic
And lential rhyme

Technical conditions

IPK Publishing Standards

Moscow

Interstate standard

Date of administration 01.01.78

This standard applies to steel hot-rolled with one-sided rhombic and leaning rifrance of general purpose sheets.

1. Sortiment

1.1a. Sheet rolling in thickness is manufactured:

high accuracy - a,

normal accuracy - V.

(Introduced additionally, meas. No. 4).

1.1. Form, dimensions, limit deviations and weight of 1 m 2 sheet with rhombic and lentilicular riflation must comply with the specified on , and in.

At the request of the consumer, sheets and rolls are manufactured with utmost deviations: 20 mm - width for roll rolled over 1000 mm with unedged edge; 15 mm - in length for a sheet of over 2000 to 6000 mm and over with a thickness of 4.0 and 5.0 mm; 25 mm - with a thickness of 6.0; 8.0; 10.0 and 12.0 mm. (Modified edition, change No. 3, 4). 1.10. Deviations from flatness - according to GOST 19903 improved flatness. (Modified edition, change No. 4). 1.11. (Excluded, change No. 1.) 1.12. Requirements for steel manufactured in rolls, as well as the size of rolls in width - according to GOST 19903. Examples of conventional designations Hot-rolled sheet of steel stamp steel according to GOST 380 with one-sided rhombic rifer size 3.0´ 1000 ´ 2000 mm, normal precision in thickness, improved flatness with rolled edge: Liszing rhombus in K-PU-3,0´ 1000 ´ 2000 ST3SP GOST 8568-77 List of lentil in-K-PU-3,0´ 1000 ´ 2000 ST3SP GOST 8568-77 Rolled hot rolled rolled steel brand ST3SP according to GOST 380 with one-sided rhombic rifer size 3.0´ 1000 mm, high accuracy, with rolled edge: Roll rhombus a-k-3.0 ´ 1 000 ST3SP GOST 8568-77 The same, with lential one-sided corrugation: Roll of lentil A-K-3.0´ 1 000 ST3SP GOST 8568-77 (Modified edition, change No. 2,3,4). 2. Technical requirements 2.1. Sheets and rolls are manufactured in accordance with the requirements of this Standard for the Technological Regulations approved in the prescribed manner. 2.2. Sheets and rolls are made of carbon steel ordinary grades of St0, St1, St2 and St3 (boiling, calm and semi-luminous) with chemical composition according to GOST 380 In coordination of the manufacturer with the consumer, it is allowed to manufacture sheet rental without rationing of chromium content, nickel, copper. 2.1, 2.2. (Modified edition, change No. 4). 2.3. At the request of the consumer, the manufacture of sheets of steel of other brands is allowed. 2.4. Sheets, laminated on the mills of polysty rolling, are trimmed from four sides. 2.5. Sheets and rolls, rolled on the mill continuous rolling, is allowed to supply with rolled longitudinal edges. Available on the edges of the jar should not display a sheet for nominal size in width. 2.4, 2.5. (Modified edition, change No. 1). 2.6. On the surface of the sheets there should be no rolling and dysfrection captivity, shells, sinks from scale, rolled bubbles, cracks and pollution. There should be no bundles on the edges of the sheets. 2.7. On the surface of the sheets are allowed ripples, scale, rust, prints, individual captures, the depth of which does not exceed the limit deviations in thickness. 3. Rules of acceptance 3.1. Sheets and rolls are accepted by parties. The party consists of a sheet of one type of rifrance. Part Definition - according to GOST 14637. 3.2. To control the size and quality of the surface, two sheets are selected or one roll. 3.3. Upon receipt of unsatisfactory control results, at least one of the indicators, re-control is carried out on a sample selected according to GOST 7566. 4. Test methods 4.1. Surface control is made without the use of magnifying devices. 4.2. The thickness of the base of sheets and the height of the rifes is measured at a distance of at least 100 mm from the corners and 40 mm from the edges. Dimensions in any measured point should not withdraw sheet thickness for limit deviations. 4.3. Height of rifleh. Determined as the difference in the size of the total sheet thicknesss.+ h. and sheet bottom thicknesss.. 5. Marking, Packaging, Transportation and Storage 5.1. Marking, packaging, transportation and storage - according to GOST 7566. (Modified edition, change No. 3). Information details 1. Designed and introduced by the Ministry of Black Metallurgy of the USSR 2. APPROVED AND INTRODUCED RESOLUTION OF THE STATE COMMITTEE OF STANDARDS OF THE SOCIETY OF USSR Ministers of 13.04.77 No. 926 3. Instead of GOST 8568-57 4. Reference regulatory and technical documents 6. Edition (September 2004) with amendments No. 1, 2, 3, 4, approved in October 1978, November 1980, June 1987, June 1989 (IUS 11-78, 1-81 , 11-87, 11-89), amendment (IUS 2-2003)

State Standard of the SSR Union

Steel sheets with rhombic
And lential rhyme

Technical conditions

GOST 8568-77

State Committee of the USSR on Standards

State Standard of the SSR Union

Failure to comply with the standard is prosecuted by law.

This standard applies to steel hot-rolled with one-sided rhombic and leaning rifrance of general purpose sheets.

Modified edition. Change № 4.

1. Sortiment

1.1. Form, dimensions, limit deviations and weight of 1 m 2 sheet with rhombic and lentilicular riflation must comply with the specified on , and in.

Modified edition. Change № 2.

1.1a. Sheet rolling in thickness is manufactured:

high accuracy - a,

normal accuracy - V.

Modified edition. Change № 4.

At the request of the consumer, sheets and rolls are manufactured with utmost deviations: 20 mm - width for roll rolled over 1000 mm with unedged edge; 15 mm - in length for a sheet of over 2000 to 6000 mm and over with a thickness of 4.0 and 5.0 mm; 25 mm - with a thickness of 6.0; 8.0; 10.0 and 12.0 mm. Modified edition. Change № 3, 4. 1.10. Deviations from flatness - according to GOST 19903-74 improved flatness. Modified edition. Change № 1, 4. 1.11. (Excluded. Change number 1.) 1.12. Requirements for steel manufactured in rolls, as well as the size of rolls in width - according to GOST 19903-74. Examples of conventional designations Hot-rolled sheet from steel brand ST3SP according to GOST 380 -88 with one-sided rhombic rifer size 3.0´ 1000 ´ 20 00 mm, normal precision in thickness, improved flatness with rolled edge: Liszing rhombus in K-PU-3,0 ´ 1000 ´ 2000 ST3SP GOST 8568-77 List of lentil in-K-PU-3,0 ´ 1000 ´ 2000 ST3SP GOST 8568-77 Rolled hot rolled rolling brand ST3SP according to GOST 380 -88 with one-sided rhombic rifer size 3.0´ 1000 mm, high accuracy, with rolled edge: Roll rhombus a-k-3.0´ 1 000 ST3SP GOST 8568-77 The same, with lential one-sided corrugation: Roll of lentil A-K-3.0 ´ 1 000 ST3SP GOST 8568-77 2. Technical requirements 2.1. Sheets and rolls are manufactured in accordance with the requirements of this Standard for the Technological Regulations approved in the prescribed manner. Modified edition. Change № 4. 2.2. Sheets and rolls are made of carbon steel ordinary grades of St0, St1, ST2 and ST3 (boiling, calm and semi-luminous) with chemical composition according to GOST 380 -88. In coordination of the manufacturer with the consumer, it is allowed to manufacture sheet rental without rationing of chromium content, nickel, copper. Modified edition. Change № 4. 2.3. At the request of the consumer, the manufacture of sheets of steel of other brands is allowed. Modified edition. Change № 1, 3. 2.4. Sheets, laminated on the mills of polysty rolling, are trimmed from four sides. 2.5. Sheets and rolls, rolled on the mill continuous rolling, is allowed to supply with rolled longitudinal edges. Available on the edges of the jar should not display a sheet for nominal size in width. Modified edition. Change № 1. 2.6. On the surface of the sheets there should be no rolling and dysfrection captivity, shells, sinks from scale, rolled bubbles, cracks and pollution. There should be no bundles on the edges of the sheets. 2.7. On the surface of the sheets are allowed ripples, scale, rust, prints, individual captures, the depth of which does not exceed the limit deviations in thickness. 3. Rules of acceptance 3.1. Sheets and rolls are accepted by parties. The party consists of a sheet of one type of rifrance. Definition of a party according to GOST14637-79. Modified edition. Change № 2. 3.2. To control the size and quality of the surface, two sheets are selected or one roll. 3.3. Upon receipt of unsatisfactory control results, at least one of the indicators, re-control is carried out on the sample selected according to GOST 7566 -81. 4. Test methods 4.1. Surface control is made without the use of magnifying devices. 4.2. The thickness of the base of sheets and the height of the rifles is measured at a distance of at least 100 mm from the corners and 40 mm from the edges. Dimensions in any measured point should not withdraw sheet thickness for limit deviations. 4.3. Height of rifleh. Determined as the difference in the size of the total sheet thicknesss. + h. and sheet bottom thicknesss.. 5. Marking, Packaging, Transportation And storage 5.1. Marking, packaging, transportation and storage - according to GOST 7566 -81. Modified edition. Change Number 3.