GOST 3875-83

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  ГОСТ 3875-83

GOST 3875−83 steel Wire Cardin. Specifications (with Amendments No. 1, 2)

GOST 3875−83

Group V72*
__________________________
* In pointer «National
standards» 2005, the group V71. -
Note the «CODE».

INTERSTATE STANDARD

STEEL WIRE CARDED

Specifications

Steel card wire. Specifications

OKP 12 2100

Date of introduction 1984−07−01

INFORMATION DATA

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

2. APPROVED AND promulgated by the Decree of the State Committee of standards of Ministerial Council of the USSR from 03.03.83 No. 1069

3. REPLACE GOST 3875−59

4. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS

5. Limitation of actions taken by Protocol No. 7−95 Interstate Council for standardization, Metrology and certification (ICS 11−95)

6. EDITION with Amendments No. 1, 2 approved in April 1985, December 1988 (IUS 7−85, 4−89)


This standard applies to hardened and tempered steel wire, round and shaped steel used in the manufacture of brackets needle products.

1. TYPES AND BASIC DIMENSIONS

1.1. The wire is divided into:

the shape of the cross section:

round

rectangular, obtained by flattening the wire

oval;

at sight surface:

uncoated

tinned — L.

Tinned wire is produced only round;

for precision manufacturing:

normal

high — P;

mechanical properties:

1st class

2nd class.

1.2. The nominal dimensions and limit deviations from nominal dimensions shall be as specified in table.1 and on features.1−3.

Table 1

mm

The round wire of the 2nd class is made with a diameter of 0,22−0,56 mm.

Damn.1, 2, 3

By agreement between the consumer and the manufacturer is allowed to produce an intermediate wire sizes not covered by tables.1. Limit deviations for these dimensions should correspond to the limit deviations of the nearest larger size.

1.3. The roundness of the circular wire should not exceed half of the limit deviations from the nominal diameter.

The radii of curvature of the cross section oval wire and are reference and on the wire are not checked.

Examples of symbols

Round wire, diameter 0.26 mm, normal precision, 1-grade, tin-plated, steel stamps 55:

Circle. 0,26−1-L-55 GOST 3875−83

Wire rectangular, size 0,30х0,60 mm, high accuracy, 2-grade of steel grade 65G:

Rectangular and. 0,30х0,60-P-2−65G GOST 3875−83

Wire oval, size 0,32х0,42 mm, 2nd grade, steel grade 70:

Oval. 0,32х0,42−2-70 GOST 3875−83.

1.1−1.3. (Changed edition, Rev. N 2).

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.

Wire shall be manufactured from steel of grade 55 according to GOST 1050 or other regulatory-technical documentation 70 marks, 65G, 70G GOST 14959 or other regulatory-technical documentation.

At the request of the consumer the run of the carbon content should be not more than 0.05%.

(Changed edition, Rev. N 2).

2.2. The surface of the light wires should be no tint, captivity, burrs, cracks, scratches, holes, rust, and without scars.

The surface of the tinned wire must be covered with a continuous layer of tin, no blacks, cracks, delamination, rust, and free of nodules, increasing the actual diameter of the wire on the magnitude of the more extreme deviations from the nominal diameter.

2.3. The wire should be straight.

2.4. Wire shall be tested for breaking with the node, while breaking strength shall be not less than 55% of the breaking strength of the same wire at the gap with no node.

2.5. The tin coating should be durable. When winding tinned wire tightly adjacent coils along a helical line on a cylindrical core with a diameter equal to four diameters of wire, there should not be delamination and cracking of the coating. The number of turns must not be less than six.

2.6. Rupture strength of the wire depending on the steel grades shall conform to the standards given in table.2.

Table 2

Notes:

1. Standards for temporary tear resistance are introduced with effect from 01.01.92, in addition to the round wire without coating of steel grade 55 all classes and brands of 70 1 grade oval and round tin-plated steel stamps 55 of 1st class. The determination of the temporal rupture strength required for statistical purposes.

2. If the determination of the temporal rupture strength at the ends of the strand test results fall into two classes, the coils belonging to one of the classes is set to a smaller value.

3. The run of temporary tear resistance of wire on a reel should be no more than 100 N/mm(kgf/mm).


(Changed edition, Rev. N 2).

2.7. In the microstructure of the wire is not allowed the presence of structurally free ferrite.

2.8. Wire is manufactured in coils consisting of one segment. The inner diameter of a coil should be 200−360 mm. Winding wire shall be carried out without entanglement of the coils and permit the free unwinding coil. The ends of the wire should be easy to find. During the liberation from the bindings of a coil wire should not be folding in the «eight».

(Changed edition, Rev. N 2).

2.9. Weight of a coil of light wire round and oval cross section shall be as defined in table.3.

Table 3

Allowed weight of a coil of wire of not less than 30% of normal in the amount of not more than 10% of the mass of the party.

Weight of a coil of tinned wire shall be not less than 0.3 kg rectangular and not less than 0.5 kg.

3. ACCEPTANCE RULES

3.1. Wire is accepted by the parties. The party should consist of wire of the same size, type, type of surface, the same class, and must be issued by a quality document in which you specify:

trademark or the name and trademark of manufacturer;

symbol wire;

the net mass;

the date of packaging;

stamp of technical control;

chemical composition of steel.

(Changed edition, Rev. N 2).

3.2. The appearance inspection, dimensional inspection, inspection of temporary tear resistance and run temporary tear resistance subjected to each coil.

3.3. To check straightness, microstructure and the tensile test with the node selected 3% of the skeins, but at least three.

3.4. If unsatisfactory test results repeat tests are carried out at twice the sample. The results of repeated tests considered final.

4. TEST METHODS

4.1. For determination of the temporal rupture strength and run the temporary tear resistance is taken one sample from each end of the strand, and to check the straightness, of the microstructure, the tensile test with the node at one sample from each roll.

4.2. The size of the wire and check with a micrometer according to GOST 6507 and Mr of the type according to GOST 4381 in two mutually perpendicular directions of the same cross-section in at least three areas of a coil.

(Changed edition, Rev. N 2).

4.2. The inner diameter of a coil is provided technologically.

(Added, Rev. N 2).

4.3. The determination of the temporal rupture strength and the rupture test with the node is carried out according to GOST 10446, with breaking strength shall be not less than 55% of the breaking strength of the same wire at the gap with no node. The cross-sectional area of the rectangular wire in millimeters is calculated by the formula

,

where and are the sizes of the wire;

0,18 — correction factor.

(Changed edition, Rev. N 1, 2).

4.4. The microstructure of the wire test according to GOST 8233. Allowed to manufacturer the microstructure to check periodically on demand of the consumer.

4.5. Control the straightness of the wire is performed on undeformed samples of length 300 mm. the Samples are placed on a surface plate according to GOST 10905. When rolling in any position they have the entire length be in contact with the surface of the plate. Allowed mismatch of the free end of the wire piece with the surface of the Board not exceeding 1 mm. the measurement of the deflection of the sample is carried out using the probe on the other 2−034−225.

(Changed edition, Rev. N 1, 2).

4.6. The test winding is carried out according to GOST 10447.

4.7. The chemical composition of the wire is not check and certify the document as a manufacturer of steel.

(Added, Rev. N 2).

5. PACKING, MARKING, TRANSPORTATION AND STORAGE

5.1. The wire is coated with a thin layer conservation and oil brands NG-and NG 203A-203B for OST 38.01436 or K-17 GOST 10877, or GSD and GSD-1 and other brands according to normative-technical documentation. Allowed the dilution of lubricants industrial oil type-12A and 10A according to GOST 20799 in 1:1 ratio. The lubricant must not cause clumping of the coils, preventing the unwinding of the wire.

5.2. Rolls of barbed wire should be tied and secured its own end.

Coils of wire of the same type and size can be linked in coils annealed wire according to GOST 3282 or other soft wire or twine according to GOST 17308, or other dressings according to normative-technical documentation. Dressings have to be impregnated with lubricant brands specified in clause 5.1. Linking the coils into the Bay is carried out in at least three places.

Coils of wire must be wrapped and the wrapping paper according to GOST 8828 or waxed according to GOST 9569, or other paper, protecting the wire from corrosion.

5.3. Each ball must be attached to the label, which indicate:

trademark or the name and trademark of manufacturer;

symbol wire;

rupture strength of the ends of a coil;

the date of packaging.

To the Bay must be attached to the label, which indicate:

trademark or the name and trademark of manufacturer;

symbol wire;

the date of packaging.

(Changed edition, Rev. N 2).

5.3. Wire that is sent to the far North and the districts equal to them, packaged according to GOST 15846.

(Added, Rev. N 2).

5.4. Packed wire bundles (coils) are placed in metal barrels that protect the wire from moisture, made in the normative-technical documentation. Barrel diameter 375−600 mm, height 320−1000 mm.

5.5. Mass Bay wire should be no more than 15 kg.

5.6. Weight of cargo space — no more than 320 kg.

Consolidation packages in overpacks shall be carried out according to GOST 24597, GOST 21650 and goods transportation regulations approved by the relevant departments.

(Changed edition, Rev. N 2).

5.7. Transport marking — according to GOST 14192.

5.8. Transportation of the wire should be held by all types of transport in accordance with goods transportation regulations applied to this type of transport, and conditions of loading and fastening of cargoes, approved by the Ministry of Railways of the USSR.

The wire transport by rail should be carried out in covered wagons or carload small shipments or in open wagons in containers according to GOST 18477.

5.9. Storage of wire — under the terms of 5 (ОЖ4) GOST 15150.