Is the main state standard that regulates the manufacture steel sheets with rhombic and lentil corrugation made by hot deformation. This standard applies to both conventional and stainless steel, so if you are interested in stainless steel, this standard will be useful to you.

Having familiarized yourself with this regulatory document, you will have an idea of \u200b\u200bthe range, technical requirements, acceptance rules, methods of testing this type of rolled metal. This can help you when choosing quality items to buy.

Assortment

The first thing that interests the buyer is the size. contains an assortment of sheets with rhombic and lenticular corrugation. The following sizes are available for release: by thickness from 2.5 to 12 mm, in width from 600 to 2200 mm, in length from 1400 to 8000 mm with a graduation of 50 mm. However, the manufacture of products of other sizes is also allowed.

The corrugated sheet differs from the usual one by the presence of special protrusions on the surface. These protrusions have their own technological purpose. and it is because of them that consumers purchase this type of rolled metal. However, some may not know how to distinguish rhombic corrugation from lentil corrugation.

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

• With rhombic corrugation, convex lines are clearly visible on the surface, which, crossing, form diamond-shaped niches. These raised lines have clear boundaries and are continuous throughout the length.
• In the case of lenticular corrugation, projections are arranged in a certain way on the surface of the sheet. They resemble small slides and are located at right angles to each other. These projections are short and flatter.

The most popular among buyers are sheets with lentil corrugation. They have a more pleasant appearance and therefore can be used for more tasks.

When buying, it is important to take into account that the corrugation is applied to the surface on one side only!

The standard regulates the following parameters for each sheet size: thickness, width, mass of one square meter and dimensional deviations. Parameters such as the width of the groove base, the angle at the top of the grooves, the length of the grooves, the radius of their rounding, and their location on the plane specified in the standard but not controlled... They are given as a reference for tool making.

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

You can see the list of permissible sizes and the corresponding limit deviations in the table below.

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

In the event that the product is made on sheet rolling mills, thickening of its base in the middle part is allowed. This thickening should be no more than +0.2 mm plus maximum deviation.

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

It is important to know that corrugated steel with one-side corrugation is also produced in the form of coils.

Corrugation dimensions

As for the height of the riffle, the standard indicates that it should be within 0.1 - 0.3 thickness, but not less than 0.5 mm. If the consumer requires thick sheets (5 mm or more), then it is allowed to increase the minimum height of the corrugation to 1 mm, but only by agreement.

For sheets with rhombic corrugation, the diagonals of the rhombus can have a length of (25 - 30) x (60 - 70) mm. However, corrugation with other dimensions is allowed by agreement. The location of large diagonals along or across the sheet is set by the manufacturer.

For sheets with lenticular corrugation, the distance between the corrugations can be 20, 25 or 30 mm.

Limit deviations

Limit deviations in sheet thickness can be found in the table above, but deviations in length and width are not indicated there. The standard states that they must be taken from GOST 19903 Hot-rolled sheet metal... Deviations from the plane must be taken from the same standard for normal and improved plane.

If rolled products are manufactured in rolls, the requirements and sizes of rolls must be taken from GOST 19903.

Legend

Looking at the symbol at first it is difficult to make out what all these letters and numbers mean. However, this is not as difficult as it seems at first glance.

• At the beginning comes the product labeling. The type of product is indicated: sheet or roll and the type of corrugation.
• The following is an indication of the manufacturing accuracy: A - high accuracy, B - normal.
• Then the type of edge is indicated. K - rolled.
• Then comes the dimensions: thickness x width x length (or thickness x width in the case of a roll)
• At the very end, the steel grade and GOST are indicated.

Technical requirements

Rhombic and lenticular corrugated sheets are manufactured as required from carbon steel or other steel grades.

When manufactured in a sheet rolling mill, the product is cut from four sides.

When manufacturing on a continuous rolling mill, the presence of rolled longitudinal edges is allowed. If there are jagged edges on the edges, their value should not deduce the width of the sheet beyond the nominal dimensions.

Acceptance and Testing

After the end of the production process, it is time to accept batches. The batch must contain rolled products of one type of corrugation. That is, there cannot be a single lentil in a batch of rhombic sheets. The definition of the batch must be taken from GOST 14637.

To make the necessary measurements, one roll or two sheets are taken from the batch. If at least one unsatisfactory result is obtained in the process of determining the quality, a second stage of testing is performed. For this stage, the sample is made in accordance with GOST 7566.

Measurements to determine the thickness of the base and the height of the corrugations are made at a distance of at least 100 mm from the corners and 40 mm from the edges.

The riffle height is determined by subtracting the base plate thickness from the total thickness.

History of the Standard

It was developed and introduced by the USSR Ministry of Ferrous Metallurgy. On April 13, 1977, it was approved and put into effect by the State Committee of Standards of the 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 Certification removed the term limitation from it.

GOST 8568-77

INTERSTATE STANDARD

TECHNICAL CONDITIONS

Official edition

IPK PUBLISHING STANDARDS Moscow

to GOST 8568-77 Steel sheets with rhombic and lenticular corrugation. Technical conditions

what place

Printed

Should be

C. Amendment No. 3 (IUS No. 11-87) and Reissue (December 1993) with Amendments No. 1, 2, 3, 4

Clause 1.1. Table, Rhombic corrugation. Column "Weight of 1 m 2 sheet, u\u003e, For the thickness of the base of the sheet:

s - 6.0 mm s - 8.0 mm

66

66,6

C. Reprinted (December 1995) and Edition (September 2004)

with Amendments No. 1, 2, 3, 4

Clause 1.1. Table. Rhombic corrugation. Column "Weight of 1 m 2 sheet, kg". For sheet base thickness s - 6.0 mm

(IUS Ms 122005)

INTERSTATE STANDARD

STEEL SHEETS WITH RHOMBIC AND LENTAL RIFLING

Technical conditions

Corrugated steel rhombic and lentil form sheets. Specifications

MKC 77.140.50 * 1

Date of introduction 01.01.78

This standard applies to hot-rolled steel sheets with one-sided rhombic and lenticular corrugation for general use.

1. VARIETY

1.1a. Rolled sheets are manufactured in thickness: high accuracy - A, normal accuracy - B.

(Introduced additionally, Amendment No. 4).

1.1. The shape, dimensions, maximum deviations and weight of 1 m 2 of a sheet with rhombic and lenticular corrugation must correspond to those indicated in Fig. 1, 2 and in the table.

Official edition

Reprinting prohibited

© Publishing house of standards, 1977 IPK Publishing house of standards, 2004

6.0 8,0 10,0 12,0

6.0 8,0 10,0 12,0

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

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

3. The width of the corrugation base L, the angle at the top of the corrugation φ, the diagonal of the rhombus / + t 2, the angle of the corrugation on the plane of the sheet φ, the distance between the corrugations t, the length of the corrugation I, the radius of the corrugation R on the finished sheets are not controlled and are given for calculations when making a tool.

4. The weight of 1 m 1 2 of a sheet is determined by the nominal dimensions of the sheets, the height of the corrugation equal to 0.2 of the sheet thickness, the small diagonal of the rhombus equal to 27.5 mm, and the larger diagonal of the rhombus equal to 65 mm. The density of the steel is 7.85 g / cm 3 4 5.

5. (Deleted, Amendment No. 4).

(Modified edition, Amendments No. 2, 3, 4, Amendment).

1.2. Corrugated rolled products are manufactured in sheets and rolls with one-sided rhombic or lentil corrugation.

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

(Modified edition, Amendment No. 2).

1.4. Sheets with rhombic corrugation are made with rhombus diagonals (25-30) x (60-70) mm. The configuration of the corrugations and the location of the large diagonals of the rhombus along or across the sheet are set by the manufacturer.

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

(Changed edition, Amendments No. 2, 3).

1.5. Lentil corrugated sheets are produced with a groove spacing of 20, 25 and 30 mm.

1.6. Sheets are made with a width of 600 to 2200 mm and a length of 1400 to 8000 mm with a gradation of 50 mm.

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

(Modified edition, Amendment No. 3).

1.8. Sheets are made by size:

indicating the dimensions in thickness in accordance with the dimensions indicated in the table, and in width and length within the limits specified in clause 1.6 - Form I;

with indication of dimensions in thickness within the limits indicated in the table, without specifying dimensions in width and length - form II;

indicating the dimensions, multiples of the width and length, the dimensions specified by the consumer within the limits established in clause 1.6 - form III;

with an indication of the measured dimensions within the limits specified in clause 1.6 - form IV.

(Modified edition, Amendment No. 1).

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

At the request of the consumer, sheets and rolls are made with maximum deviations;

20 mm - in width for rolled coils over 1000 mm with unedged edges;

15 mm - in length for sheets 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, Amendments No. 3, 4).

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

(Modified edition, Amendment No. 4).

1.11. (Deleted, Amendment No. 1).

1.12. Requirements for rolled products, manufactured in rolls, as well as roll dimensions in width - according to GOST 19903.

Examples of symbols:

Hot-rolled sheet of steel grade StZsp according to GOST 380 with one-sided rhombic corrugation measuring 3.0 x 1000 x 2000 mm, normal thickness accuracy, improved flatness with rolled edge:

Sheet rhombus V-K-PU-3.0x 1000u. 2000 StZsp GOST 8568-77

Lentil leaf V-K-PU-3,0u 1000 y 2000 StZsp GOST 8568-77

Hot-rolled coils of the StZsp grade in accordance with GOST 380 with one-sided rhombic corrugation, 3.0 x 1000 mm, high precision, with rolled edge:

Roll rhombus A-K-3.0 u 1000 StZsp GOST 8568-77

The same, with one-sided lenticular corrugation:

Roll of lentils А-К-3,0у 1000 StZsp GOST 8568-77.

(Modified edition, Amendments No. 2, 3, 4).

2. TECHNICAL REQUIREMENTS

2.1. Sheets and rolls are manufactured in accordance with the requirements of this standard for technological regulations, approved in the prescribed manner.

2.2. Sheets and coils are made of ordinary quality carbon steel of the StO, St1, St2 and StZ grades (boiling, calm and semi-calm) with a chemical composition according to GOST 380.

By agreement between the manufacturer and the consumer, it is allowed to produce sheet metal without standardizing the content of chromium, nickel, copper.

2.1. 2.2. (Modified edition, Amendment No. 4).

2.3. At the request of the consumer, it is allowed to manufacture sheets of steel of other grades.

(Modified edition, Amendment No. 3).

2.4. Sheets rolled in sheet rolling mills are trimmed on four sides.

2.5. Sheets and coils rolled on a continuous rolling mill may be supplied with rolled longitudinal edges.

Notches on the edges should not bring the sheet out of the nominal dimensions in width.

2.4, 2.5. (Modified edition, Amendment No. 1).

2.6. On the surface of the sheets there should be no rolling and ingot captivity, hollow shells, scale shells, rolled bubbles, cracks and dirt. There should be no delamination on the edges of the sheets.

2.7. On the surface of the sheets, ripples, dross, rust, imprints, individual captivity are allowed, the depth of which does not exceed the maximum deviations in thickness.

3. RULES OF ACCEPTANCE

3.1. Sheets and rolls are accepted in batches. The batch consists of sheets of one type of corrugation. Determination of the batch - according to GOST 14637.

3.2. To control the dimensions and surface quality, two sheets or one roll are taken from the batch.

3.3. Upon receipt of unsatisfactory control results for at least one of the indicators, repeated 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 the sheets and the height of the corrugations are measured at a distance of at least 100 mm from the corners and 40 mm from the edges.

Dimensions at any measured point should not take the sheet thickness beyond the limit deviations.

4.3. The groove height h is determined as the difference between the dimensions of the total sheet thickness s + h and the thickness of the base of the sheet s.

5. LABELING, PACKAGING, TRANSPORTATION AND STORAGE

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

(Modified edition, Amendment No. 3).

INFORMATION DATA

1. DEVELOPED AND INTRODUCED by the Ministry of Ferrous Metallurgy of the USSR

2. APPROVED AND PUT INTO EFFECT by the Decree of the State Committee of Standards of the Council of Ministers of the USSR No. 926 dated April 13, 1997

3. REPLACE GOST 8568-57

4. REFERENCE REGULATORY AND TECHNICAL DOCUMENTS

5. The limitation of the period of validity was removed according to the protocol No. 7-95 of the Interstate Council for Standardization, Metrology and Certification (IUS 11-95)

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)

Editor L.I. Nakhimova Technical editor V.N. Prusakova Proofreader A.S. Chernousova DTP by S.V. Ryabova

Ed. persons. No. 02354 dated 14.07.2000. Put in a set 20.09.2004. Signed for print on 06.10.2004. Service l. 0.93. Academic and Publishing House 0.60.

Circulation 162 copies. C 4125. Zak. 866.

IPK Standards Publishing House, 107076 Moscow, Kolodezny per., 14. e-mail:

Typeset in the Publishing House on a PC

Printed in the branch of the IPK Publishing house of standards - type. "Moscow printer", 105062 Moscow, Lyalin per., 6.

1.9; 1.10; 1.12

5. The limitation of the validity period has been removed according to protocol N 7-95 of the Interstate Council for Standardization, Metrology and Certification (IUS 11-95)

6. EDITION (September 2004) with Amendments 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)


Amendment published in IUS N 12, 2005

Corrected by the manufacturer of the database


This standard applies to hot-rolled steel sheets with one-sided rhombic and lenticular corrugation for general use.

1. VARIETY

1. VARIETY

1.1a. Thickness of rolled sheets is produced:

high accuracy - A,

normal accuracy - V.

(Introduced additionally, Amendment N 4).

1.1. The shape, dimensions, maximum deviations and weight of 1 m of a sheet with rhombic and lenticular corrugation must correspond to those indicated in Fig. 1, 2 and in the table.

Notes:

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

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

3. Width of the groove base , angle at the top of the grooves, diagonals of the rhombus, the angle of the grooves on the plane of the sheet, distance between the grooves , riffle length , radius of curvature of the riffle on finished sheets are not controlled and are given for calculations in the manufacture of tools.

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

5. (Deleted, Amendment No. 4).


(Modified edition, Rev. N 2, 3, 4, Amendment).

1.2. Corrugated rolled products are manufactured in sheets and rolls with one-sided rhombic or lentil corrugation.

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

(Modified edition, Amendment N 2).

1.4. Sheets with rhombic corrugation are made with rhombus diagonals (25-30) x (60-70) mm. The configuration of the corrugations and the location of the large diagonals of the rhombus along or across the sheet are set by the manufacturer.

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

(Modified edition, Amendments N 2, 3).

1.5. Lentil corrugated sheets are produced with a groove spacing of 20, 25 and 30 mm.

1.6. Sheets are made with a width of 600 to 2200 mm and a length of 1400 to 8000 mm with a gradation of 50 mm.

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

(Modified edition, Amendment N 3).

1.8. Sheets are made by size:

indicating the dimensions in thickness in accordance with the dimensions indicated in the table, and in width and length within the limits specified in clause 1.6 - Form I;

with indication of dimensions in thickness within the limits indicated in the table, without specifying dimensions in width and length - form II;

indicating the dimensions, which are multiples of the width and length, the dimensions specified by the consumer within the limits established in clause 1.6 - form III;

with an indication of the measured dimensions within the limits specified in clause 1.6 - form IV.

(Modified edition, Amendment N 1).

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

At the request of the consumer, sheets and rolls are made with maximum deviations;

+20 mm - in width for rolled coils over 1000 mm with unedged edges;

+15 mm - in length for sheet 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.

(Changed edition, Amendments N 3, 4).

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

(Modified edition, Amendment N 4).

1.11. (Deleted, Rev. N 1).

1.12. Requirements for rolled products, manufactured in rolls, as well as roll dimensions in width - in accordance with GOST 19903, hereinafter in the text. - Note from the manufacturer of the database.

Rhombus sheet V-K-PU-3.0x1000x2000 St3sp GOST 8568-77

Lentil leaf V-K-PU-3.0x1000x2000 St3spGOST 8568-77

Hot-rolled coils, grade St3sp in accordance with GOST 380, with one-sided rhombic corrugation, 3.0x1000 mm in size, high accuracy, with rolled edge:

Roll rhombus А-К-3,0х1000 St3sp GOST 8568-77

The same, with one-sided lenticular corrugation:

Roll of lentils А-К-3,0х1000 St3spGOST 8568-77

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

2. TECHNICAL REQUIREMENTS

2.1. Sheets and rolls are manufactured in accordance with the requirements of this standard for technological regulations, approved in the prescribed manner.

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

By agreement between the manufacturer and the consumer, it is allowed to produce sheet metal without standardizing the content of chromium, nickel, copper.

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

2.3. At the request of the consumer, it is allowed to manufacture sheets of steel of other grades.

(Modified edition, Amendment N 3).

2.4. Sheets rolled in sheet rolling mills are trimmed on four sides.

2.5. Sheets and coils rolled on a continuous rolling mill may be supplied with rolled longitudinal edges.

Notches on the edges should not bring the sheet out of the nominal dimensions in width.

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

2.6. On the surface of the sheets there should be no rolling and ingot captivity, hollow shells, scale shells, rolled bubbles, cracks and dirt. There should be no delamination on the edges of the sheets.

2.7. On the surface of the sheets, ripples, dross, rust, imprints, individual captivity are allowed, the depth of which does not exceed the maximum deviations in thickness.

3. RULES OF ACCEPTANCE

3.1. Sheets and rolls are accepted in batches. The batch consists of sheets of one type of corrugation. Determination of the batch - according to GOST 14637.

3.2. To control the dimensions and surface quality, two sheets or one roll are taken from the batch.

3.3. Upon receipt of unsatisfactory control results for at least one of the indicators, repeated 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 the sheets and the height of the corrugations are measured at a distance of at least 100 mm from the corners and 40 mm from the edges.

Dimensions at any measured point should not take the sheet thickness beyond the limit deviations.

4.3. The height of the grooves is determined as the difference between the dimensions of the total thickness of the sheet and the thickness of the base of the sheet. .

5. LABELING, PACKAGING, TRANSPORTATION AND STORAGE

5.1. Marking, packaging, transportation and storage - in accordance with GOST 7566.

(Modified edition, Amendment N 3).



Electronic text of the document
prepared by Kodeks JSC and verified by:
official publication
Moscow: IPK Standards Publishing House, 2004

Document revision taking into account
changes and additions prepared
JSC "Codex"