GOST 5468-88

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  ГОСТ 5468-88

GOST 5468−88 Wire needle. Specifications (with Amendments No. 1, 2, adjusted)

GOST 5468−88
Group V71*
__________________________
* In pointer «National
standards» 2005, V72 group. -
Note the manufacturer’s database.

INTERSTATE STANDARD

WIRE NEEDLE

Specifications

Needle wire. Specifications

OKP 12 2100

Date of introduction 1990−01−01

INFORMATION DATA

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

2. APPROVED AND put INTO force by the Decision of Gosstandart of the USSR from 28.03.88 N 780

3. REPLACE GOST 5468−50

4. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS

5. The expiration time limit is removed by Resolution of the Committee of standardization and Metrology of the USSR from 29.12.91 N 2304

6. EDITION with Amendments No. 1, 2 approved in February 1990, December 1991 (I & C 5−90, 5−92)


AMENDED, published in IMS No. 5, 2004

An amendment made by the manufacturer of the database


This standard applies to carbon steel wire of circular cross-section for the manufacture of products used in textile, light industry and machine needles.

1. BASIC PARAMETERS AND DIMENSIONS

1.1. Needle wire is manufactured:

the chemical composition of the four grades: I1, I2, I3, I4;

for precision manufacturing of four groups; 1, 2, 3, 4;

1, 2 for the latch and the hook of the needles, reeds, runners;

1, 2, 3 for special flat needles;

2, 3 — needles for industrial and domestic sewing machines, breakdown and maintenance of needles;

4 — needles for sewing by hand and needle other household products;

mechanical properties of two classes: a And B;

for the ultimate treatment:

annealed — O;

calibrated — K.

(Changed edition, Rev. N 1).

1.2. The diameter of the wire and limit deviation shall be as given in table.1.

Table 1

mm

Notes:

1. Customer’s request wire manufacture intermediate diameters for special flat needles with marginal variance set to the nearest larger diameter.

2. By agreement between the consumer and the manufacturer is allowed to produce wire 4 of the second group of accuracy with extreme deviation of not more than minus 0.02 mm.


(Changed edition, Rev. N 1, 2).

1.3. The roundness of the wire must not exceed half of the limit deviation for diameter.

Examples of symbols

Wire diameter 0.80 mm, grade 2, class A, group 2, annealed:

Wire 0,8 И2А-2−0 GOST 5468−88

The same, with a diameter of 2.20 mm, grade 1, class B, group 3, calibrated:

Wire 2.2 И1Б-3-K GOST 5468−88

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.

2.2. The wire shall be made of steel with the chemical composition according to GOST 1435 and another NTD in accordance with table.2. Fluctuation of the carbon content in the reel of wire must not exceed 0.05%.

Table 2

(Changed edition, Rev. N 1).

2.3. The surface of the wire shall be bright, smooth, without cracks, sunsets, shells, shells, dents and rust.

2.4. Mechanical properties of wire shall comply with the standards given in table.3.

Table 3

Notes:

1. Norms relative elongation of the calibrated wire are introduced with effect from 01.01.91.

2. For a wire diameter of 0.8 mm or less, the test for elongation is allowed to replace a rupture test with the node. Thus the breaking strength of the wire must be at least 50% of the breaking strength at break without knot.


Run a temporary resistance on the roll should not exceed:

50 N/mm(5 kgf/mm) — wire class A;

70 N/mm(7 kg/mm) — wire class B.

(Changed edition, Rev. N 1, 2).

2.5. The microstructure of the wire should consist of a uniformly distributed granular perlite and match 3−6 points scale 2 GOST 8233.

The inclusion of graphite in the microstructure of the wire is not allowed.

Allowed traces of graphite is not more than 1 score in the microstructure of the wire class B to 4 groups of precision.

2.6. The complete decarburization of the wire is not allowed. By agreement between the consumer and the manufacturer allowed the partial decarburization of the wire.

(Changed edition, Rev. N 1).

2.7. Wire is manufactured in coils. Skein must consist of one segment. The wire should be wound without entanglement of the coils and to permit free spooling of the wire. During the liberation from the bindings of a coil wire should not be folding in the «eight».

Weight of a coil of wire must conform to table.4.

Table 4

2.8. Each skein should be tied with soft wire according to GOST 3282 or other normative and technical documentation in at least three places evenly spaced around the circumference of the rolls.

Coils of wire of the same diameter, one mark, one class, one type of final processing is allowed to associate in the Bay.

2.9. The wire should be covered with a continuous layer of preservation oil K-17 graveyard 10877, grease type NG-203 grades A or B at the NTD, like GSD or GSD industrial oil research.

Permitted by agreement with the consumer to apply any other oil or grease, providing protection against corrosion.

2.10. Each skein or Bay wire with a diameter of 1.00 mm and less should be wrapped in a layer of paper and placed in a tight wooden box of the type II according to GOST 18617 or other containers (metal, cardboard, plastic).

Each skein Bay or wire diameter more than 1.00 mm should be wrapped in a layer of paper, then a layer of a polymeric film or nonwoven materials, or woven fabrics of the chemical fibers.

When mechanized packaging a coil of wire should be wrapped in a layer of paper 10396 churchyard or paper stamps KMV-170 or other crepe paper, equal in protective properties, or a polymer film with simultaneous locking packaging wire according to GOST 3282 or other regulatory-technical documentation.

During transportation in containers of all wire diameters must be Packed in paper and plastic film, or nonwoven fabrics, or woven fabrics of the chemical fibers.

The quality of packaging materials used:

the waxed paper according to GOST 9569 (allowed the use of two-layer paper 8828 churchyard or other securities that provide protection against corrosion);

the polymeric film according to GOST 10354, GOST 16272, or other polymer film;

container holstoproshivny or laminated fabric, stitched ribbon from textile industry waste or woven fabrics of chemical fibers according to normative-technical documentation.

2.11. Each Bay or coils of wire shall be securely attached a label, which indicate:

trademark or the name and trademark of manufacturer;

the symbol wire.

2.12. Hard containers should be specified:

trademark or the name and trademark of manufacturer;

symbol wire;

weight of wire, net, kg.

2.13. Transport marking under GOST 14192.

3. ACCEPTANCE RULES

3.1. Wire take parties. The party should consist of wire of the same brand, same trunks, same diameter, one group, one class, one type of end treatment shall be furnished a document about quality that contains:

trademark or the name and trademark of manufacturer;

symbol wire;

the results of the tests;

a lot of wire, net, kg.

3.2. Surface quality and diameter of the wire is checked for each reel.

3.3. To check the temporary tear resistance, bursting with node, microstructure, inclusions of graphite, decarburization select 10% of the skeins, but at least three of the party.

Check elongation of wire the manufacturer conducts periodic, but not less than once per quarter, 5% coils, but at least three of the party, which passed acceptance tests.

The inclusion of graphite in the wire is allowed to check if this is ensured by the technology of the manufacture of wire.

(Changed edition, Rev. N 1, 2).

3.4. The chemical composition of the wire shall be certified by a document of quality of the manufacturer of the steel.

Accessory wire to this steel grade is checked against the carbon, in this case take 3% of the skeins, but not less than three skeins of the party.

Fluctuation of the carbon content of a single reel do not check if this is ensured by the technology of the manufacture of wire.

If there is disagreement to determine the fluctuations in the content of carbon in a single reel take 3% of the skeins, but not less than three skeins of the party.

3.5. If unsatisfactory test results of at least one of the indicators, a second test on this indicator at twice the sample. The results of repeated tests apply to the entire party.

4. TEST METHODS

4.1. To check the temporary tear resistance, elongation, bursting with node, microstructure, decarburization and fluctuations of the carbon content in a single reel selected one sample from each coil, to check the amount of carbon — one sample from the roll.

To check inclusions of graphite taken at the two sample anywhere along the length of the roll.

(Changed edition, Rev. N 2).

4.2. Wire diameter check the measuring instrument corresponding accuracy in two mutually perpendicular directions of the same cross-section in at least two places along the length of the roll.

4.3. Control of the microstructure should be carried out according to GOST 8233.

4.4. The surface quality of the wire is controlled to the naked eye. Allowed to use the magnifying glass zoom 5.

If there is disagreement on the presence of cracks on the surface of the wire groups 1 and 2 the accuracy of their estimate when to control the microstructure, the depth should not be more than the maximum deviations for diameters from 0.25 to 3.00 mm and not more than 0.015 mm for wire diameters of 3.00 mm.

4.5. Check the carbon content is carried out according to GOST 22536.0 to GOST 22536.1, GOST 18895или other methods providing the required accuracy.

(Changed edition, Rev. N 1).

4.6. Test wire tensile should be carried out according to GOST 10446 on a tensile testing machine, the capacity of which does not exceed the fivefold breaking strength of wire samples with an estimated length of 100 mm.

4.7. Check the wire to the absence of decarbonization should be carried out according to GOST 1763.

4.8. The definition of inclusions of graphite must be carried out by metallographic methods on transverse sections at magnification of 320by comparing nodule sections with the scales given in the Appendix.

Allowed:

the use of magnification 300;

the definition of inclusions of graphite on the longitudinal micro-sections at magnification of 300and 320;

determination of graphite in the wire by chemical method according to GOST 22536.1.

(Changed edition, Rev. N 1).

4.9. Weighing of packages in the batch should be conducted on the weights according to GOST 29329.

5. TRANSPORTATION AND STORAGE

5.1. The gross mass of the package should be no more than 100 kg.

Consolidation packages in overpacks carried out according to GOST 24597, GOST 21650.

5.2. Wire transporterowych by all kinds of transport in covered vehicles in accordance with cargo carriage regulations applicable to transport of this species.

Transportation of the wire for railway carriages is small and light shipments.

Stowage and securing of cargo in vehicles must meet the specifications of loading and fastening of cargoes, approved by the Ministry of Railways of the USSR.

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

5.3. Storage wire — on storage conditions 5 GOST 15150.

APP (mandatory). SCALE INCLUSIONS of GRAPHITE 320_(x)

APP
Mandatory

Inclusions of graphite and not more than 0,040%

The inclusion of graphite from 0,041 to 0,080%

The inclusion of graphite from 0,081 to 0,270%

The inclusion of graphite from 0,271 to 0,390%

The electronic text of the document
prepared by JSC «Code» and checked by:
the official publication of the
Wire metal. Part 1: Sat. Standards. -
M.: IPK Publishing house of standards, 2003