GOST 19903-2015

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  ГОСТ 19903-2015

GOST 19903−2015 hot-rolled steel sheets. Assortment

GOST 19903−2015

INTERSTATE STANDARD

HOT-ROLLED STEEL SHEETS

Assortment

Hot-rolled steel sheets. Dimensions

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Text Comparison 19903−2015 GOST with GOST 19903−74 see the link.
— Note the manufacturer’s database.
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ISS 77.140.50

Date of introduction 2016−09−01

Preface

Goals, basic principles and main procedure of works on interstate standardization have been established in GOST 1.0−2015 «interstate standardization system. Basic provisions» and GOST 1.2−2015 «interstate standardization system. Interstate standards, rules and recommendations on interstate standardization. Rules of development, adoption, renewal and cancellation"

Data on standard

1 DEVELOPED by the State enterprise «Ukrainian research & technology center of metallurgy industry «Energostal» (SE «ukrrtc «Energostal»), the Interstate technical Committee for standardization MTK 327 «bars, shapes and sections"

2 INTRODUCED by the Ministry of economic development and trade of Ukraine

3 ACCEPTED by the Interstate Council for standardization, Metrology and certification by correspondence (minutes of August 27, 2015 N 79-P)


The adoption voted:

4 by Order of the Federal Agency for technical regulation and Metrology of April 7, 2016 N 246-St inter-state standard GOST 19903−2015 introduced as a national standard of the Russian Federation from September 1, 2016.

5 INSTEAD OF GOST 19903−74


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 hot-rolled steel sheet (hereinafter the lease) with a width of 500 mm or more, manufactured in sheets with thickness from 0.4 mm up to 160,0 mm and coils with thickness from 1.2 mm to 25.0 mm.

2 Classification. Basic parameters and dimensions

2.1 rentals are divided as follows:

— precision manufacturing thickness:

— flatness:

— type of edge:

— size:

By agreement between manufacturer and consumer intervals across the width and length can be reduced.

Manufacturer of sheet metal, dimensional size that is different from sizes listed in table 1 and Appendix A, made by agreement with the consumer;

— types:

The note — Sheets are made by tile rolling or cutting of rolled products by size.

2.2 Dimensions of rolled products, manufactured in the leaves must correspond to those in table 1, the coils in table 2. By agreement with the consumer it is allowed manufacture of rolled products of other sizes.

2.3 maximum deviations in thickness of rolled manufactured in sheets and rolls, shall not exceed the values given in tables 3 and 4.

By agreement with the consumer allowed a reduction in the negative extreme deviations on the thickness of the hire or manufacture of rolled products only minus or only plus extreme deviations, the sum of limit deviations for thickness of the hire shall not exceed the sum of their values given in tables 3 and 4.

Table 1 — Dimensions of rolled products, manufactured in sheets

Table 2 — Dimensions of rolled products, produced in rolls

Table 3 — Limit deviations on thickness rolled, manufactured in sheets and rolls

Table 4 — Limit deviations on thickness rolled, manufactured in sheets

End of table 4

2.4 At the request of the consumer the thickness variation of rolled manufactured in rolls, in one cross section should not exceed half of the sum of limit deviations for thickness.

2.5 tolerances for the width of the rolled, sheared edge, that is manufactured in rolls, shall not exceed:

+5 mm — at width from 500 mm to 1000 mm incl.;

+10 mm — at width more than 1000 mm.

2.6 tolerances for the width of the rolled, sheared edge, manufactured in the leaves must not exceed the values given in table 5.

Table 5

2.7 Limit deviations on width of rolled manufactured one tile at a time unedged sheets should not exceed more than 50 mm limit deviations on width specified in table 5. By agreement with the consumer allowed other positive limit deviations on width of rolled.

2.8 Limit deviations on width of rolled manufactured in sheets, rolls and sheets cut from coil with mill edge should not exceed:

+20 mm — at width 1000 mm incl.;

30 mm — at width more than 1000 mm.

2.9 maximum deviation on length of hire, made one tile at a time, shall not exceed the values given in table 6.

Table 6

2.10 maximum deviations along the length of the rolled, cut into sheets, should not exceed the values given in table 7.

Table 7

2.11 Deviation from flatness of rolled manufactured in sheets of 1 m length should not exceed the values given in table 8.

Table 8

2.12 Camber rolled, manufactured in rolls, shall not exceed 10 mm for a length of 3 m.

In coordination with the consumer of camber-rolled, manufactured in sheets, should not exceed 2 mm per 1 m length.

For rental, manufactured in sheets and rolls, can be installed, another permissible value of camber in agreement with the consumer.

Determination of the camber of the rental the manufacturer is allowed not to perform.

2.13 Cutting of the rental should be at a right angle. Cut end Squareness, mm, and the camber should take rentals, manufactured in sheets, the nominal dimensions and limit deviations of width and length.

2.14 in the manufacture of rolled in sheets and in coils with mill edge tears and other defects must not exceed half of the sum of limit deviations on width and display hire for a nominal size width specified in the order.

2.15 rolling, manufactured in rolls should not be twisted and crumpled. Allowed in some places folded edge at an angle less than 90°.

2.16 is basically a telescoping of rolls should not exceed the values given in table 9.

Table 9

2.17 the Thickness of the rolled measured at:

— the leaves at a distance of not less than 40 mm from edges and not less than 100 mm from the ends;

— rolls — at a distance of not less than 40 mm from edges and not less than 2 m from the end of the roll.

2.18 the width of the rolled, manufactured in rolls measuring not less than 2 m from the end of the roll.

The ends of the partial width by length should not exceed the width of the roll.

By agreement between the consumer and the manufacturer ends incomplete width needs to be cropped.

2.19 Methods of measurement of geometric tolerances according to GOST 26877 with additions.

2.19.1 the Deviation from flatness of rolled manufactured in the leaves is the greatest distance between the surface of rolled, laid on a flat surface (surface plate) and attached the line 1 m long in any direction.

The deviation from flatness of hire determines the length of 1 m.

2.20 the Coil may consist of no more than two pieces (separate or United welded seam).

The ratio of the lengths of the pieces in one roll must be at least 1:5. By agreement between the consumer and the manufacturer are allowed coils with a large number of pieces, or welds.

2.21 the Inner diameter of the coil shall be not less than 650 mm and not more than 1000 mm.

2.22 the Mass of the coil is set by agreement between the consumer and the manufacturer.

Annex a (informative). The dimensions of rolled products, manufactured in sheets

Appendix A
(reference)

Table A. 1 — Dimensions of rolled products, manufactured in sheets

Continuation of table A. 1