GOST 6727-80

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  ГОСТ 6727-80

GOST 6727−80 Wire, cold-drawn mild steel for reinforcement of concrete structures. Technical specifications (Changes No. 1−4)

GOST 6727−80
Group V71

INTERSTATE STANDARD

THE WIRE COLD DRAWN FROM LOW CARBON STEEL FOR REINFORCEMENT OF CONCRETE STRUCTURES

Specifications

Cold-drawn low-carbon steel wire for reinforced concrete. Specifications

ISS 77.140.65
OKP 12 1400

Date of introduction 1983−01−01

INFORMATION DATA

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

E. M. Kireev, K. G. Zalyalyutdinov, H. N. Bellow, N. Galkina, T. A. Korshunova, K. V. Mikhailov, V. I. Bondarenko, V. M. Skubko

2. APPROVED AND put INTO EFFECT by Decision of the USSR State Committee for standards from 15.05.80 N 2108

3. REPLACE GOST 6727−53

4. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS

5. Limitation of actions taken on the Protocol 2−93 Interstate Council for standardization, Metrology and certification (ICS 2−93)

6. EDITION (may 2003) with Changes 1, 2, 3, 4, approved in December 1984, June 1987, October 1988, February 1990 (IUS 3−85, 10−87, 1−89, 5−90)

The re-release (as of April 2008)


This standard applies to low-carbon steel wire cold drawn periodic profile VR-1 for reinforcement of concrete structures.

(Changed edition, Rev. N 2, 3).

1. BASIC PARAMETERS AND DIMENSIONS

1.1. (Deleted, Rev. N 3).

1.2. Main parameters and sizes of wire shall be as specified in table.1.

Designation of wire sizes given on the drawing.

Table 1

mm

Note. Nominal pitch of nicks and the radius of the fillet surface nicks to the ridges are reference values for designing a profiling tool and wire are not checked.


(Changed edition, Rev. N 2, 3).

1.3. The radius of the fillet surface nicks to the ridges of the wire diameters must be equal to (2,5±0,5) mm.

Allowed relative displacement of the opposing indentations to 0.5and their location along a helix the axis of the wire.

(Changed edition, Rev. N 2).

1.4. The difference in size and must not exceed the tolerance on size .

Example of designation of wire nominal diameter of 3.0 mm:

The 3 wire VR-1 GOST 6727−80.

(Changed edition, Rev. N 3).

2. TECHNICAL REQUIREMENTS

2.1. Wire shall be manufactured in accordance with the requirements of this standard for technological regulations approved in the prescribed manner.

The wire produced from wire rod by OST 14−15−193.

(Changed edition, Rev. N 1, 2).

2.2. Mechanical properties of the wire shall be as specified in table.2.

Table 2

(Changed edition, Rev. N 1, 3).

2.3. On the surface of wire should be free of cracks, shells, sunsets, shells.

Allowed marks and scratches with a depth of no more than half of the limit deviations on size and rust.

(Changed edition, Rev. N 3).

2.4. Wire is produced in coils weighing 500−1500 kg. allowed the manufacture of wire in coils weighing 20−100 lbs. Each skein must consist of a single segment wire. The wire should be folded into skeins separatornyi rows.

(Changed edition, Rev. N 2).

2.5. The linear density of the wire shall be as defined in table.3.

Table 3

The calculated sectional area and theoretical linear density of the wire is given in Annex 2.

(Changed edition, Rev. N 2, 3).

3. ACCEPTANCE RULES

3.1. Wire take parties. The party should consist of wire of the same diameter, one decorated by a quality document, which should indicate:

is the trademark or name and trademark of manufacturer;

— designation of wire;

— test results;

— number of coils;

— the batch number;

the weight of the party;

— the national quality Mark for wire of the highest quality.

(Changed edition, Rev. N 1, 2, 3).

3.2. Size , the size difference and the quality of the wire surface test on each reel.

(Changed edition, Rev. N 3).

3.3. To check the mechanical properties of the wire and parameters of the profile wire of the party should be selected 3% of the skeins, but not less than 5 skeins.

(Changed edition, Rev. N 2).

3.4. If unsatisfactory test results of at least one of the indicators, repeat tests are carried out at twice the sample. The results of re-examination extends to the whole party.

4. TEST METHODS

4.1. For each test taken one sample from one end of the strand.

4.2. The surface quality of the wire is controlled by the naked eye.

4.3. Dimensions and wire measured with a micrometer according to GOST 6507.

The magnitude of difference sizes and is defined as the arithmetic average of three measurements on the section length of 1 m.

(Changed edition, Rev. N 2, 3).

4.4. The settings of the profile wire is determined as the arithmetic average of three measurements on a plot length of 1 m on each side.

The depth of the dent is measured with a micrometer according to GOST 6507 with special heel (Annex 1).

Ridge length is measured by a reading microscope of MPB-2, manufactured according to technical documentation.

The differences in the measurement of profile wire control is carried out at linear density of wire (table.3).

The linear density of the wire is defined as the quotient of mass of two samples of length 1 m, weighed with accuracy to 0.001 kg, their length measured with an accuracy of up to 0.001 M.

(Changed edition, Rev. N 2, 3).

4.5. Test wire tensile is carried out according to GOST 12004.

4.6. Test the wire on the bend is carried out according to GOST 1579. Wire diameter of 3,0 and 4,0 mm is tested on cylinders with a diameter of 20 mm and a diameter of 5.0 mm — for rollers with a diameter of 30 mm.

When testing wire sample is clamped so that the dents were facing the jaws of the device.

4.5, 4.6. (Changed edition, Rev. N 2).

4.7. The depth of scratches or surface marks determined by removing them cleaning up with further comparative dimension to the stripped and unstripped areas.

(Changed edition, Rev. N 2, 3).

5. PACKING, MARKING, TRANSPORTATION AND STORAGE

5.1. Each skein weighing 500−1500 kg should be evenly bandaged around the circumference of no less than four places, and a coil mass 20−100 kg — not less than three places.

Customer’s request coil weight of 500−1500 kg must have intermediate binding located inside of a coil.

As binding materials used in the rod OST 14−15−193 or annealed wire according to normative-technical documentation.

The ends of the rolls should be neatly arranged and easy to find.

(Changed edition, Rev. N 2, 4).

5.1 a. Coils of wire with mass 20−100 kg are tied into the Bay.

Weight of cargo must not weigh more than 1500 kg. In agreement with the consumer allowed the increase in the mass package.

The package is formed into transport packets according to GOST 24597 and GOST 21650.

(Added, Rev. N 2).

5.2. To each coils (the Bay) shall be securely attached a label, which indicate:

is the trademark or name and trademark of manufacturer;

— designation of wire;

— the batch number;

— stamp of technical control;

— the national quality Mark for wire of the highest quality.

(Changed edition, Rev. N 1, 2).

5.3. Wire is transported by all kinds of transport in accordance with cargo carriage regulations applicable to transport of this species. Stowage and securing of cargo on vehicles transported by rail, must comply with the technical conditions of loading and fastening of goods* approved by the Ministry of Railways of the USSR. Transportation by rail is carried out carload and LTL or small shipments.
________________
* Probably, the error of the original. Should read: «Technical conditions of loading and fastening cargoes». — Note the manufacturer’s database.

Allowed the transport of wire in universal containers according to GOST 15102,20435 GOST, GOST 22225.

5.4. Storage of wire — under the terms of 5 GOST 15150.

5.3, 5.4. (Changed edition, Rev. N 2).

5.5. Transportation of the wire to be sent to the far North and equivalent areas, carried out according to GOST 15846.

(Changed edition, Rev. N 3).

5.6. Transport marking under GOST 14192.

(Added, Rev. N 2).

ANNEX 1 (mandatory). The special heel-to-micrometer MK-type according to GOST 6507 for measuring the depth of dents

ANNEX 1
Mandatory

Material — steel SHKH15, U10A, U12A. Hardness is HRC48−50.

ANNEX 2 (informative). The calculated sectional area and theoretical linear density of the wire

ANNEX 2
Reference

APPENDIX 2. (Changed edition, Rev. N 2, 3).



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M.: STANDARTINFORM, 2008