GOST 8283-93

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  ГОСТ 8283-93

GOST 8283−93 steel sections trough angle. Assortment

GOST 8283−93

Group B22

INTERSTATE STANDARD

STEEL BENT TROUGH ANGLE
Assortment
Bent steel hat equal sections. Dimensions

ISS 77.140.70
GST 11 2000

Date of introduction 1997−01−01

Preface

1 DEVELOPED by the Ukrainian scientific-research Institute of metals

INTRODUCED by Gosstandart of Ukraine

2 ADOPTED by the Interstate Council for standardization, Metrology and certification (Protocol No. 3 dated February 17, 1993)

The adoption voted:

3 Decree of the Russian Federation Committee on standardization, Metrology and certification dated June 19, 1996 N 380 interstate standard GOST 8283−93 introduced directly as state standard of the Russian Federation from January 1, 1997

4 REPLACE GOST 8283−77

5 REISSUE. October 2012

1 this standard applies to steel bent hat-section profiles manufactured by roll forming units of cold-rolled and hot-rolled sheet rolled carbon steel of ordinary quality, carbon and low alloy structural quality.

2 On the accuracy of the profiling roll-formed profiles are produced:

A — high accuracy;

B — the increased accuracy;

V — usual accuracy.

3 Cross section of the profile must match that specified on figure 1.

Figure 1

Legend for figure and tables:

 — the height of the profile wall;

 — profile width;

 — the width of the shelf;

 — thickness profile;

 — radius of curvature;

is the moment of inertia;

 — the moment of resistance;

 — radius of gyration;

 — the distance from the axis to the outer surface of the wall;

the cross — sectional area;

 — the ratio of the calculated flange width to thickness;

 — the ratio of the calculated width to the thickness;

 — the ratio of the calculated height profile and the thickness.

4 Sizes of profiles, a cross-sectional area, reference values and weight of 1 m of the profile should match:

for profiles of carbon and boiling semi-killed steel of ordinary quality and quality carbon steel with a temporary tear resistance of not more than 460 N/mm(47 kgf/mm) are given in table 1;

for profiles of the carbon balanced and calm steel of ordinary quality, quality carbon steel with a tensile of more than 460 N/mm(47 kgf/mm) and low alloy steel are given in table 2.

Table 1

Table 2

Notes to tables 1 and 2

1 cross-sectional Area and reference values calculated based on nominal sizes. The density of steel is 7.85 g/cm.

2 the Radii of curvature control in bore rolls and provide manufacturing technology.

3 By agreement between manufacturer and consumer parts made of carbon rimming steel is manufactured with radii of curvature in accordance with table 2.

5 Limit deviations for height and width of the wall profile should correspond to those in table 3.


Table 3

In millimeters

6 Limit deviations on width of the shelf shall be as specified in table 4.


Table 4

In millimeters

7 maximum deviations from the 90° angle must not exceed ±1°30'.

8 Profiles are produced with a length of from 3 to 11.8 m:

the measured length;

measuring length with non-standard not more than 10% of the batch weight;

multiple of gauging length;

multiple lengths random with not more than 10% of the batch weight;

of random length.

At the request of the consumer profiles are made of limited length within off-gage.

9, the maximum deviations along the length of the profiles dimensional and multiple lengths shall not exceed:

+40 mm profile length up to 6 m, inclusive;

+80 mm «"" more than 6 m.

At the request of the consumer for profiles up to 7 m of limit length deviation can be plus 40 mm, over a length of 7 m — 40 mm, plus 5 mm on each meter.

10 the Twisting of profiles around the longitudinal axis should not exceed the 1° to the length of profile in meters and may not exceed 10°.

11 the curvature of the profiles should not exceed 0.1% of the measured length.

12 shelves Waviness profile should not exceed 2 mm per 1 m.

13 wall Height and section width are controlled in the plane at a distance equal to the outer radius of curvature.

14 Definition of cross-sectional dimensions of profiles, as well as torsion and curvature is carried out at a distance from the ends when the accuracy of profiling, at least:

high — 300 mm;

conventional and high — 500 mm.