GOST 11474−76
Group B22

INTERSTATE STANDARD

STEEL SECTIONS

Specifications

Bent-steel sections. Spеcifications

INFORMATION DATA

1. DEVELOPED AND INTRODUCED by the Ministry of ferrous metallurgy of the USSR

2. APPROVED AND put INTO EFFECT by Decision of the USSR State Committee for standards from 17.02.76 N 428

3. INSTEAD 11474−65 GOST and GOST 8275−57

4. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS

5. Limitation of actions taken by Protocol No. 2−92 of the Interstate Council for standardization, Metrology and certification (ICS 2−93)

6. The re-release (Dec 2002) with Changes in N 1, 2, 3, 4, 5, approved in September 1981, January 1985, June 1987, July 1989, October 1990 (IUS 12−81, 3−86, 11−87, 11−89, 1−91)

Revised (as of September 2008)

This standard applies to steel bent profiles of various shapes, sizes and purposes, manufactured on roll forming mills of hot-rolled and cold-rolled carbon ordinary quality, quality carbon structural and low alloy steel.

(Changed edition, Rev. N 3, 4).

1. ASSORTMENT

1.1.* The cross-sectional shape, sizes, maximum rejections of sizes of roll-formed profiles, as well as the curvature, the torsion and undulation of shelves profiles, 7511 GOST, GOST 8278, 8281 GOST, GOST 8282, 8283 GOST, GOST 9234, 10551 GOST, GOST 14635, 13229 GOST, GOST 19771, 19772 GOST, GOST 25557.

Maximum deviations in thickness of sections should correspond to the limit deviations of the thickness of the workpiece width of 1000−2000 mm precision rolling A and B, given for hot rolled steel GOST 19903 for cold rolled steel to GOST 19904.

Maximum deviations in thickness of the profiles do not extend to the places of bending.

Examples of symbols:

The channel of high accuracy profiling And height 100 mm, width 50 mm, thickness 3 mm according to GOST 8278 of the workpiece normal accuracy of rolling B, 2nd category according to GOST 16523, from steel grade st3sp:

The channel

The bended angle of high accuracy profiling B-width of larger shelves 120 mm, a width of 100 mm lower shelf thickness 6 mm according to GOST 19772 procurement of high precision rolling And 3rd category according to GOST 19281 steel 09Г2:

Area

The profile is roll-formed C-shaped steel angle with a height of 300 mm, width 60 mm flange width 50 mm, thickness of 5 mm according to GOST 8282, of the workpiece normal rolling accuracy B, with mechanical properties according to GOST 14637, steel St3kp:

The C-shaped profile

Profile bent angle Zeta normal precision profile height 65 mm, width 45 mm, more shelves, less shelves width 40 mm, thickness 3 mm the churchyard 13229, from billet normal accuracy of rolling B, 2nd category according to GOST 17066, of steel grade 09Г2:

Z profile

The profile of the curved trough angle normal precision profile, the height of the wall 80 mm, width 60 mm, shelf height 54 mm, thickness 4 mm according to GOST 8283 from billet normal precision B, 3rd category according to GOST 1577, of steel grade 08ps:

Korytne profile

Special bent profile 10 N according to GOST 14635 from billet normal accuracy of rolling B with mechanical properties according to GOST 14637, of steel grade Ст3сп3:

Profile

Corrugated profile thickness 4 mm, width 1200 mm, increments of 400 mm corrugation height corrugation 60 mm, length 6000 mm according to GOST 9234 from billet normal accuracy of rolling B with mechanical properties according to GOST 14637, of steel grade Ст3пс2:

Profile corrugated

Corrugated profile type 14 (profile type corresponds to the drawing number) flange width 100 mm, height 23 mm, thickness 2 mm, length 6000 mm according to GOST 10551 from billet normal accuracy of rolling B, 3rd category according to GOST 16523, steel St3kp:

Profile corrugated 14

(Changed edition, Rev. N 2, 3, 4).

2. TECHNICAL REQUIREMENTS

2.1. Curved profiles are produced from steel grades according to GOST 14637, GOST 16523, GOST 1577, GOST 17066, GOST 19281 with a temporary tear resistance of not more than 588 MPa (60 kgf/mm).

(Changed edition, Rev. N 5).

2.2. Mechanical properties of cold-formed sections define the workpiece under shot 1577, GOST 14637, GOST 16523, GOST 17066, GOST 19281.

(Changed edition, Rev. N 3, 5).

2.3. On the surface of cold-formed sections should not be stress crack, cracks, rolled, rolling and kletochnykh prisoner, accordions, shells from scale, katanoi scale, blisters-blisters and rolled out of the dirt.

Allowed separate, rolled, bubbles, fingerprints, nicks, scratches, risks, a layer of oxides that do not impede the detection of surface flaws, minor General rabinna from the fallen scale, not deducing the thickness of the profile limit deviations.

2.4. On edges and ends of roll-formed sections should not be chipping, peeling, torn edges and tightened.

On edges and ends of roll-formed profiles are allowed dings and nicks, not displaying the profile dimensions to nominal dimensions.

2.5. For corrugated and corrugated profiles of the first group-quality bends on the ends are allowed; for the second group the quality of allowed bends at the ends of the profiles with thickness less than 3 mm, bringing the length of the profile for the nominal dimensions, not more than 10% of the mass of the party.

2.6. Cracks at the ends and along the length of the profiles in the places of bend of the first group quality are not allowed. For the second group the quality of fruit split at the ends of the profiles and in places bending length of not more than 10 mm — thickness profiles up to 2 mm, not more than 15 mm — thickness profiles from 2 to 5 mm and not more than 20 mm when the thickness of profile 5 mm or more, not deducing the length of sections for nominal dimensions.

2.3−2.6. (Changed edition, Rev. N 3).

2.7. Profiles are produced from billets obtained from a sheet of rolled steel normal accuracy of rolling B and high precision rolling A.

Profiles from hot-rolled netravlenoy blanks are manufactured without oiling with traces of emulsion technology.

Profiles from hot-rolled pickled and cold-rolled blanks are made oiled. At the request of the consumer profiles of hot rolled pickled and cold-rolled blanks are made without oiling with traces of emulsion technology.

(Changed edition, Rev. N 2).

2.8. Allowed profiles with transverse welds. Weld strength is provided by the technological process of welding should not be below the strength of the base metal.

3. ACCEPTANCE RULES

3.1. Profiles accepted by the parties. Party think profiles one melting and one profilemaster.

3.2. Chemical composition and mechanical properties of cold-formed sections take the document about the quality of the factory presets.

(Changed edition, Rev. N 3).

3.3. Sample size — according to GOST 1577, GOST 14637, GOST 16523, GOST 17066, GOST 19281.

(Changed edition, Rev. N 5)

3.4. Dimensions shall be checked by the manufacturer on one profile not less than 0,25-hour performance of the roll-forming unit.

The consumer to check the dimensions profiles select 2% of the mass of the party, but at least two profiles.

(Changed edition, Rev. N 3).

3.5. The appearance test is subjected to each profile.

3.6. (Deleted, Rev. N 2).

3.7. If unsatisfactory validation results at least one indicator of a re-test is carried out on a sample selected according to GOST 7566.

3.8. By agreement between manufacturer and consumer strength test of a welded joint by the manufacturer is allowed to produce.

(Added, Rev. N 3).

4. TEST METHODS

4.1. Chemical composition of steel is determined by plavonia the screener analysis sample GOST 12344 — GOST 12352, 12355 GOST — GOST 12359, 12361 GOST, GOST 18895, GOST 22536.0 to GOST 22536.10, 22560 GOST, GOST 28473.

4.2. Sampling for chemical analysis is carried out according to GOST 7565.

4.3. Test of mechanical properties of cold-formed sections is carried out on the workpiece according to GOST 1577, GOST 14637, GOST 16523, GOST 17066, GOST 19281.

(Changed edition, Rev. N 5)

4.4. Sampling for testing of mechanical properties — according to GOST 7564.

4.5. The test welded joints for strength — according to GOST 1497.

4.6. The size and shape of the profiles checking a measuring instrument 162 according to GOST, GOST 166, GOST 427, GOST 5378, GOST 6507, GOST 7502.

4.5, 4.6. (Changed edition, Rev. N 3).

4.7. The surface quality of the profiles checking without the use of magnifying devices.

5. PACKAGING, LABELING AND TRANSPORTATION

5.1. Packaging, labeling, documentation, transportation and storage of profiles — according to GOST 7566 and GOST 21929.

(Changed edition, Rev. N 3).

5.2. Corrugated and corrugated profiles transporterowych packages, connected by two transverse strips when the length of the profiles up to 6 m, three transverse strips with a length of more than 6 m.

5.3. Bent shapes transportyour transport of any kind.

Transport profiles on the Railways is made on the open rolling stock, placement and mounting in accordance with the rules of carriage in force in rail transport.

5.2, 5.3. (Changed edition, Rev. N 1).

5.4. Profiles according to GOST 14635 N 16 and 18 transporterowych in bundles weighing up to 6 t, N profiles 17, 20, 21 and 22 up to 10 tons.

(Added, Rev. N 1).

NOTES OF FGUP «STANDARTINFORM»

1 On the first page to Supplement code: ISS 77.140.70 (index «National standards», 2008)

2 Information data. Reference normative and technical documents:

GOST 380−94 is replaced by GOST 380−2005;

GOST 12344−88 replaced by GOST 12344−2003;

GOST 12351−81 replaced by GOST 12351−2003.

3 In the information index «National standards» N 6−2006 published amendment

GOST 11474−76 steel sections. Specifications (see the re-release (February 1990) with Amendments No. 1, 2, 3, 4; Reprint (December 1998), with Changes N 1, 2, 3, 4, 5; Edition (December 2002) with Changes in N 1, 2, 3, 4, 5)