GOST 12920-2013

• gost-12920-2013.pdf (457.91 KiB)
  ГОСТ 12920-2013

GOST 12920−2013 brass Wire for cold upsetting. Specifications

GOST 12920−2013

INTERSTATE STANDARD

BRASS WIRE FOR COLD UPSETTING

Specifications

Brass wire for cold upsetting

ISS 77.150.30
GST 18 4590

Date of introduction 2015−01−01

Preface

Goals, basic principles and main procedure of works on interstate standardization have been established in GOST 1.0−92 «interstate standardization system. Basic provisions» and GOST 1.2−2009 «interstate standardization system. Interstate standards, rules and recommendations on interstate standardization. The procedure of development, adoption, application, renewal and cancellation"

Data on standard

1 DEVELOPED by the Technical Committee for standardization TC 106 „Tsvetmetprokat“, Scientific-research, project and design Institute for alloys and processing of nonferrous metals „joint-stock company „Institute tsvetmetobrabotka"

2 as AMENDED by the Federal Agency for technical regulation and Metrology

3 ACCEPTED by the Interstate Council for standardization, Metrology and certification (Protocol dated 14 November 2013 No. 44−2013)

The adoption voted:

4 by Order of the Federal Agency for technical regulation and Metrology dated November 22, 2013 N 1961-St inter-state standard GOST 12920−2013 introduced as a national standard of the Russian Federation from January 01, 2015

5 REPLACE GOST 12920−67


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 round wire brass brands L63, intended for the manufacture of spiral wire and nails used in the footwear industry and hardware products manufactured by cold heading.

2 Normative references

This standard uses the regulatory references to the following standards:

GOST 1652.1−77 Alloys copper-zinc. Methods for determination of copper

GOST 1652.2−77 Alloys copper-zinc. Methods for determination of lead

GOST 1652.3−77 Alloys copper-zinc. Methods of iron determination

GOST 1652.4−77 Alloys copper-zinc. Methods of determining

GOST 1652.5−77 Alloys copper-zinc. Methods for determination of tin

GOST 1652.6−77 Alloys copper-zinc. Methods for determination of antimony

GOST 1652.7−77 Alloys copper-zinc. Methods for determination of bismuth

GOST 1652.8−77 Alloys copper-zinc. Methods for determination of arsenic

GOST 1652.9−77 Alloys copper-zinc. Methods of determining sulphur

GOST 1652.10−77 Alloys copper-zinc. Methods for determination of aluminium

GOST 1652.11−77 Alloys copper-zinc. Methods for determination of Nickel

GOST 1652.12−77 Alloys copper-zinc. Methods for determination of silicon

GOST 1652.13−77 Alloys copper-zinc. Methods for determination of phosphorus

The Wire GOST 3282−74 General purpose low carbon steel. Specifications

GOST 3560−73 package steel Strip. Specifications

GOST 4381−87 Micrometers lever. General specifications

GOST 6507−90 Micrometers. Specifications

GOST 8273−75 wrapping Paper. Specifications

GOST 9716.1−79 Alloy copper and zinc. Method of spectral analysis on a metal standard samples with photographic registration of spectrum

GOST 9716.2−79 Alloy copper and zinc. Method of spectral analysis on a metal standard samples with photoelectric registration of spectrum

GOST 9716.3−79 Alloy copper and zinc. Method of spectral analysis on the oxide samples with photographic registration of spectrum

GOST 10446−80 (ISO 6892−84) Wire. Test method tensile

GOST 14192−96 Marking of cargo

GOST 15527−2004 Alloys copper-zinc (brass) pressure treated. Brand

GOST 15846−2002 Products that are sent to the far North regions and equated areas. Packing, marking, transportation and storage

GOST 18242−72Statistical acceptance inspection by alternative feature. Plans control
_______________
On the territory of the Russian Federation GOST R ISO 2859−1-2007"Statistical methods. Procedure sampling on alternative grounds. Part 1. Sampling plans consistent parties on the basis of an acceptable level of quality"


GOST 18321−73 Statistical quality control. Methods of random selection of piece products

GOST 20435−75 the universal metal closed Container of nominal gross mass 3,0 T. specifications.

GOST 21073.0−75 ferrous Metals. Determination of grain size. General requirements

GOST 21073.1−75 ferrous Metals. Determination of grain size by comparison with the scale of microstructures

GOST 21073.2−75 ferrous Metals. Determination of grain size by the method of counting beans

GOST 21073.3−75 ferrous Metals. Determination of grain size by the method of counting intersections bean

GOST 21650−76 means of fastening of package cargoes in transport packages. General requirements.

GOST 22225−76 universal Containers with a gross weight 0,625 and 1,25 t. specifications

GOST 24047−80 Semi-finished products from nonferrous metals and their alloys. Sampling for tensile test

GOST 24231−80 non-ferrous metals and alloys. General requirements to selection and preparation of samples for chemical analysis

GOST 24597−81 the packaged goods. Basic parameters and dimensions

GOST 25086−2011 non-ferrous metals and their alloys. General requirements for methods of analysis

GOST 26663−85 transport Packs. Formation with the use of packaging. General technical requirements

ST SEV 543−77 Number. Record rules and rounding

Note — When using this standard appropriate to test the effect of reference standards in the information system of General use — on the official website of the Federal Agency for technical regulation and Metrology on the Internet or in the annual information index „National standards“ published as on January 1 of the current year, and the editions of the monthly information index „National standards“ for the current year. If the reference standard is replaced (changed), when using this standard should be guided by replacing (amended) standard. If the reference standard is cancelled without replacement, then the situation in which the given link applies to the extent that does not affect this link.

3 Terms and definitions

This standard applies the following terms with respective definitions:

3.1 wire: Prefabricated with a cross section of constant size, manufactured by rolling, pressing or drawing.

3.2 hardware: Standardized metal products of various items for industrial and household applications: bolts, screws, nuts, rivets, studs, screws, etc.

4 Assortment

4.1 nominal wire diameter and tolerances for the nominal diameter shall be as specified in table 1.


Table 1

In millimeters

4.2 Wire is delivered in Hanks or coils.

4.3 the legend of the wire are placed according to the scheme:

when the following abbreviations:

Examples of symbols:

Wire cold-drawn, round section, the normal precision manufacturing, semi-solid, with a diameter of 5.00 mm, in rolls of brass brands L63

Wire DCRP of 5.00 BT L63 GOST

Wire cold-drawn, round section, high precision manufacturing, soft, with a diameter of 7.00 mm, in rolls of brass brands L63, antimagnetic:

Wire DCCM of 7.00 AM BT L63 GOST

5 Technical requirements

5.1 Wire produced in accordance with the requirements of this standard according to the technical documentation of the manufacturer, duly approved, made of brass brands L63 GOST 15527.

Customer’s request wire is made from antimagnetic brass brands L63 GOST 15527.

5.2 Wire produced in soft and semi-solid States. Customer’s request wire for screws are made in the solid state.

5.3 the Surface of wire should be clean, free from contamination, hindering its inspection, no cracks and delamination.

On the surface of the wire allowed the color of the tint and traces of the technological lubricant, and slivers, risks, shells, scratches and other surface defects not present in the control wire Stripping for limit deviation for diameter.

5.4 Kink the wire should be uniform, without foreign inclusions, delamination, cavities and bubbles.

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


Table 2

Wire with a diameter of 2.02 mm are made with a temporary resistance 390−450 MPa (40 to 46 kgf/mm) and relative elongation after fracture of not less than 22%. At this time, the resistance of the wire in a single reel must not vary by more than 30 MPa (3 kgf/mm).

At the request of the consumer semi-solid wire is manufactured with specified limits temporary resistance 360−540 MPa (37−55 kgf/mm); solid wire diameters of 1.2−4.8 mm with more narrow limits of temporary resistance 640−840 MPa (65−85 kgf/mm).

5.6 Deviation from the shape of the cross section shall not exceed the limit deviation for diameter.

5.7 If raskladyvanii wire should not form cracks and to detect the disclosure of sunsets.

5.8 Wire with a diameter of 2.02 mm should have a grain size of from 9 to 30 microns.

5.9 the Mass of wire on a reel provided in Appendix B.

6 acceptance Rules

6.1 Wire take parties. The party should consist of wire of the same diameter, one is precision manufacturing, one state and furnished by a single document about quality that contains:

is the trademark or name and trademark of manufacturer;

— the name of the country of manufacture;

— legal address of the manufacturer and (or) the seller;

— designation of wire;

— the batch number;

the weight of the party;

— number of coils (coils)

the results of mechanical testing (at the customer’s request);

the results of the chemical composition (on customer requirement).

The weight of the batch shall be not more than 1000 kg.

Allowed to issue one document about the quality of several batches of wire of the same size, one state, one precision manufacturing, shipped to the same consumer, indicating the batch number.

6.2 To control the size and quality of the surface apply a single-stage normal sampling plan for the alternative characteristic in accordance with GOST 18242 with the acceptance level of defects is 2.5%.

The selection of skeins in the sample is carried out „blindly“ (by the greatest objectivity) churchyard 18321.

If the quantity does not exceed three coils, checked each coil.

6.3 For the control of dimensions and surface quality of the party selected coils in accordance with table 3.


Table 3

In pieces

The party is considered usable if the number of coils not satisfying the requirements of 5.3 and table 1, less than the acceptance number specified in table 4.

If unsatisfactory results are total control of the entire party.

Allowed the manufacturer to control the size and quality of the surface carried out in the production process.

6.4 For the control of mechanical properties, fracture, rivet™, and the grain size is taken two rolls of wire from the party.

6.5 To control the chemical composition selected two rolls from the party.

Allowed to the manufacturer of the sampling carried out by the molten metal.

6.6 If unsatisfactory test results of at least one of the performance indicators specified in 6.4, 6.5, on it, a second test of the doubled sample taken from the same batch. The results of repeated tests apply to the entire party.

7 Methods of inspection and testing

7.1 Control of dimensions and surface quality is carried out with a given probability of 97.5% (the acceptance level of defects is 2.5%).

7.2 the Quality of the wire surface check inspection without the use of magnifying devices.

7.3 the wire Diameter is measured on each selected reel of a micrometer according to GOST 4381, GOST 6507 or other devices that provide the necessary measurement accuracy.

The measurement of the diameter of the wire is carried out in two mutually perpendicular directions of the same section in the beginning, the end and in the middle of the roll. In diameter taking the average value of one or more pairs of measurements taken at a right angle at one cross section.

If there is disagreement in the definition of diameter is measured by micrometer according to GOST 4381, GOST 6507.

7.4 For tensile tests (tensile strength and elongation) select one sample from each selected roll. The sampling carried out in the churchyard 24047.

The tensile test is carried out according to GOST 10446.

7.5 To check break take one sample from both ends of each selected roll. Quality check of the kink on the wire diameter not less than 2 mm.

To obtain the fracture wire is incised to a depth not exceeding ¼ of its diameter, and break off at the notches. Inspection of the fracture is carried out without the use of magnifying devices.

7.6 testing rasklepyvajut from the selected one sample from each selected roll.

Test wire to rasklepyvajut carried out in a split fixture, clamped in the vise, the hole diameter in the fixture should be a wire with a diameter of 4.40 mm — 0.10 mm and the wire of 4.40 mm and higher — 0.20 mm more than the nominal size of the wire.

The height of the protruding part of the specimen subjected to the test shall be two wire diameters. Raskladyvanii is carried out under pressure or by using a universal test machine, manual hammers to obtain a flat head with a height of not more than 0.5 of the nominal diameter of the wire.

7.7 To determine the chemical composition of each selected coil cut on the same model. Selection and preparation of samples for the determination of chemical composition is carried out in the churchyard 24231.

Chemical composition analysis is carried out according to GOST 1652.1 — 1652.13 GOST, GOST 25086, 9716.1 GOST — GOST 9716.3.

Allowed to carry out chemical analysis by other methods of equal precision specified.

If there is disagreement in the assessment of the chemical composition analysis is carried out according to GOST 1652.1 — 1652.13 GOST, GOST 25086, 9716.1 GOST-GOST 9716.3.

7.8 To determine the grain size from each selected coil cut on the same model.

Measurement of grain size is performed on the micro-sections of the longitudinal section according to GOST 21073.0 — GOST 21073.4.

7.9 measurement Results are rounded according to the rounding rules established in ST SEV 543.

8 Packing, marking, transportation and storage

8.1 the Wire is wound into skeins right, separatornyi rows, without sharp bends.

Each skein must consist of a single segment wire.

8.2 Each coil of wire shall be tied with wires of diameter not less than 0.5 mm according to GOST 3282 or synthetic tape technical documents in two places symmetrically, with the twisted ends of the wire at least three turns.

8.3 Coils of wire of one party bind in the Bay. Each Bay needs to be tied up with a wire diameter not less than 1 mm according to GOST 3282 in three places evenly around the circumference of the Bay with a strip of paper according to GOST 8273 in the field of dressing with a twist of wire at least five turns.

Weight of cargo must not exceed 80 kg.

8.4 To every ball, if it is not connected to the Bay, or the Bay shall be attached a label showing:

— trademark or name and trademark of manufacturer;

— the name of the country of manufacturer;

— the legend of the wire;

— batch number;

— stamp of technical control.

8.5 Skeins or bays of the wire must be wrapped or non-woven synthetic material for technical papers and tied with wires of diameter not less than 1.0 mm according to GOST 3282 in two places symmetrically around the circumference of a coil or Bay. The outer diameter of the Bay must not exceed 1000 mm.

8.6 Consolidation packages in overpacks carried out in accordance with the requirements of GOST 26663. Fastening means in the transport packets according to GOST 21650. Dimensions of packages — according to GOST 24597.

Packaging is carried out on pallets according to GOST 9557 or GOST 9078 or without pallets with the use of bars with a height of not less than 50 mm with strapping in the longitudinal and transverse directions with wire of diameter not less than 3.0 mm according to GOST 3282 or tape not less than 0,3x16 mm according to GOST 3560. Binding: wire — stranding at least five turns of tape to the castle.

Packaging entire packages method of wrapping a circumference of a package of corrugated cardboard coated with stretch film.

Weight of cargo must not exceed 1250 kg.

8.7 permitted skeins or bays of the wire to be transported in universal containers according to GOST 20435 or GOST 22225 without packaging in packaging materials.

During transportation in containers or bays coils of wire needs to be laid and strengthened in such a way as to prevent their movement in the container. Additionally, the Bay must be protected from corrosion, contamination and mechanical damage.

8.8 allowed to use other types of packaging materials not inferior in strength of the above, and other types and methods of packing, providing safety of quality of the wire.

8.9 In each container should be attached to the packing slip, containing:

is the trademark or name and trademark of manufacturer;

— the name of the country of manufacture;

— designation of wire;

— the batch number;

— the net weight;

— gross mass;

number (or name) of the packer.

8.10 Transport marking under GOST 14192 with the application of manipulation sign „Protect from moisture“.

8.11 Packaging of wire that is sent to the far North regions and equated areas according to GOST 15846 in the group „Metals and metal products."

8.12 Wire transporterowych all types of transport in covered vehicles in accordance with cargo carriage regulations applicable to transport of this species.

8.13 Wire should be stored in covered premises. When storing and transporting the wire should be protected from mechanical damage, moisture and active chemical substances.

The consumer wire should be kept in stock in the manufacturer’s packaging for at least two days to equalize the temperature of the wire to the room temperature. After this period, the wire needs to be unpacked.

Under specified storage conditions consumer properties of the wire during storage are not changed.

Annex a (informative). The diameters of finished products

Appendix A
(reference)

Table A. 1

In millimeters

Annex b (mandatory). Weight of wire on a reel

The App
(required)

__________________________________________________________________________
UDC 669. 355−426:006.354 ISS 77.150.30 GST 18 4590

Keywords: brass wire, hardware products, screw nails and wire, assortment, technical requirements, control
__________________________________________________________________________

The electronic text of the document
prepared by JSC «Code» and checked by:
the official publication of the
M.: STANDARTINFORM, 2014