GOST 19904-90

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  ГОСТ 19904-90

GOST 19904−90 cold-rolled steel sheets. Assortment

GOST 19904−90
Band Q23

INTERSTATE STANDARD

COLD-ROLLED STEEL SHEETS

Assortment

Cold rolled steel sheets. Dimensions

ISS 77.140.50
OKP 09 0202

Date of introduction 1991−01−01

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 on management of quality and standards from 28.03.90 N 664

3. REPLACE GOST 19904−74

4. The standard complies ST SEV 1968−79 in part structural non-alloy steel of ordinary quality and of low alloy with a thickness of 0.35 to 2.80 mm

5. The standard corresponds to the international standard ISO 4997−78* in terms of requirements to the assortment

6. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS

7. REPRINTING. October 2012


This standard applies to cold-rolled steel sheet width of 500 mm or more, manufactured in sheets with a thickness of 0.35 to 5.00 mm in coils with thickness from 0.35 to 3.50 mm.

1. The number of dimensions of rolled products given in table.1.

On demand of the consumer is allowed to establish the amount other than shown in table.1.

Table 1

mm

_________________

* Only for the leaves; the total length of the rolls is not regulated.

2. Products are classified as follows:

1) precision manufacturing:

thickness:

W — high,

At — increased,

BT — normal;

width:

HS — high

ASH — increased,

BSH — normal (rolled sheet);

length: (rolled sheet, in addition to laminated one tile at a time)

VD — high,

HELL — high,

BD — normal;

2) flatness (sheet metal):

IN particularly high;

PV — high,

PU — improved

PN — normal;

3) the nature of the edges:

About — edged,

BUT — edging.

3. Sizes manufactured:

sheets of Annex 1;

rolls — Annex 2.

Sortimente features and their combinations stipulated in the order — Appendix 3.

4. Maximum deviations in thickness of the hire must not exceed given in table.2.

Table 2

mm

Note. At the request of the customer can be manufactured of rolled with the negative permissible limit deviations, equal to the sum of the limit deviations.

4.1. At the request of the consumer tolerances for plate thickness of high accuracy with a width of over 1500 up to 2000 mm shall not exceed the values given in table.3.

Table 3

mm

5. The thickness variation of the rolled in one cross section should not exceed half of the sum of limit deviations for thickness.

6. Maximum deviations along the width of the rolled mill edge should not exceed +20 mm.

7. Limit deviations on width of rolled products with sheared edge shall not exceed the values given in table.4.

Table 4

mm

7.1. At the request of the consumer, limit deviations on width of rolled products with sheared edge high and normal precision with a width of over 1000 mm shall not exceed the values given in table.5.

Table 5

mm

7.2. Limit deviations on width of rolled products with sheared edge, laminated one tile at a time, should not exceed, mm:

+6 — for widths up to 1000 mm;

+10 — at width more than 1000 up to 1500 mm;

+15 — at width more than 1500 mm.

8. Maximum deviations along the length of the sheets should not exceed the values given in table.6.

Table 6

mm

Limit deviations of length of sheet metal, laminated one tile at a time, should not exceed, mm:

+10 — at length of sheets up to 1500 mm;

+15 — at length of sheets St 1500 mm.

8.1. At the request of the consumer, the maximum deviations along the length of the sheets should not exceed, mm:

+6 — at length St. 1500 to 2000 mm (high precision manufacturing);

+0,003 nominal length — when the length of St 2000 mm (high precision manufacturing);

+6 — at a length of 1,500 mm (normal precision manufacturing).

9. Maximum deviations from flatness of sheets per 1 m of length shall not exceed the values given in table.7.

Table 7

mm

For rental the normal flatness of a width exceeding 1800 mm deviation from flatness shall not exceed 20 mm.

Deviations from flatness given in table.7, cover the leaves with a temporary resistance not exceeding 690 N/mm(70 kgf/mm). For sheets with a temporary resistance exceeding 690 N/mm(70 kgf/mm), norms, deviations from flatness are installed in the normative-technical documentation for the particular type of steel.

10. At the request of the consumer, they control the waviness of the rental.

Norms are established in the normative-technical documentation for specific product.

11. The camber of the hire shall not exceed 3 mm for a length of 1 m.

At the request of the consumer the camber of the rolled metal sheets with cut edges must not exceed 2 mm over a length of 1 m.

12. Sheet metal with cut edges must be cut at right angle. Camber, cosinus cutting and (or) deviation from the angle you should take the leaves of the nominal size.

13. Basically a telescoping of the strip rolled shall not exceed the values given in table.8.

Table 8

mm

At the request of the consumer for products with thickness up to 2.5 mm is basically a telescoping shall not exceed 30mm for coils with width up to 1000 mm and 50 mm, — a width of over 1000 mm.

Excess of one internal or external loop coil over the other is not telescopically.

14. Each roll may consist of no more than two pieces (separate or United welded seam).

The ratio of the lengths of pieces in a roll shall be not less than 1:5.

At the request of the consumer of hot-rolled coil from corrosion-resistant, heatresistant and heat-proof steels may consist of no more than five pieces (separate or United welded seam).

15. The inner diameter of the coil should be from 500 to 1000 mm.

16. The mass of the coil should be from 1.5 to 20 tons

17. The thickness of sheet metal measured at a distance of not less than 100 mm from ends and not less than 40 mm from the edges; roll — at a distance of not less than 40 mm from edges and not less than 2 m from the end.

18. The width of the roll of the rolled measured at a distance of not less than 2 m from the end, the sheet — at any section along the length.

19. The length of sheet metal is measured at any cross section across the width.

20. Control of the shape of rolled — GOST 26877.

Size control is carried out versatile or special measuring instruments with precision, producing the dimensions and limit deviations of rental specified in this standard.

Allowed the manufacturer control camber not to produce.

Raznotolshchinnost measured at the customer’s request.

ANNEX 1
Reference

Table 9

The dimensions of rolled products, manufactured in sheets

mm

______________
* With plate thickness of 1.5−2.0 mm minimum sheet length 2000 mm.

ANNEX 2 (informative). The dimensions of rolled products, produced in rolls

ANNEX 2
Reference

Table 10

mm

___________
* Made of low carbon steel grades.

APPENDIX 3 (reference). Sortimente specifications stipulated in the order

APPENDIX 3
Reference

1. Form of delivery of the rolled size is specified by the manufacturer in order.

2. Set four forms of supply of hire.

3. When ordering coils for any form length is not specified.

4. The size of rental specific forms of delivery:

f. I — indicating the thickness, width and length in accordance with table.1, Annex 1 and 2;

f. II — specifying the thickness in accordance with table.1;

f. III — c, showing the thickness and multiple dimensions of width and length in accordance with table.1;

f. IV — indicating the thickness in accordance with table.1 and measuring dimensions with a step width of 10 mm and length 50 mm.



The electronic text of the document
prepared by JSC «Code» and checked by:
the official publication of the
Steel sheet products.
Assortment: Sat. Standards. -
M.: STANDARTINFORM, 2012