GOST 3920-70

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  ГОСТ 3920-70

GOST 3920−70 tinned steel cable Wire. Specifications (with Amendments No. 1, 2)

GOST 3920−70
Group V72

INTERSTATE STANDARD

TINNED STEEL CABLE WIRE

Specifications

Tinned steel cable wire. Specifications

OKP 12 2100

Date of introduction 1971−01−01

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, measures and measuring devices under Council of Ministers of the USSR from 23.04.70 N 570

3. REPLACE GOST 3920−47

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 December 1983 and may 1988 (IUS 3−84, 8−88)


This standard applies to tinned steel cable wire for the manufacture of wires, cords and cables.

1. TYPES AND BASIC DIMENSIONS

1.1. Wire produced:

— normal strength — N;

— high strength — V.

1.2. Wire diameter and extreme deviations should conform to the standards specified in table.1.

Table 1

mm

1.3. Ovality of the wire in the section (the difference between the largest and smallest diameter of the same cross-section) should not exceed half the tolerance on the diameter.

Example of designation cable tinned wire, high strength, with a diameter of 0,4 mm:

Wire KLV-0,4 GOST 3920−70

The same, normal strength, with a diameter of 0.3 mm:

Wire KLN-0,3 GOST 3920−70

(Changed edition, Rev. N 2).

2. TECHNICAL REQUIREMENTS

2.1. Wire shall be manufactured of carbon steel according to GOST 1050 in accordance with the requirements of this standard for technological regulations approved in the prescribed manner.

(Changed edition, Rev. N 1, 2).

2.2. For the coating used tin brand 01, 02 GOST 860.

2.3. Mechanical properties the wire shall conform to the standards specified in table.2.

Table 2

(Changed edition, Rev. N 1, 2).

2.4. The wire shall withstand the rupture test with the node, wherein the breaking strength of the wire must be at least 50% of the breaking strength of the same wire at the gap with no node.

2.5. The tin coating should be smooth and continuous. On the surface of the wire should not be black, rust, peeling or sagging. Allowed local flows. The magnitude of the influx should not be more than 0.03 mm (measured from the actual diameter of the wire).

2.6. The tin coating should be durable. When coiling wire and six closely adjacent to each other coils on a cylindrical core with a diameter equal to four times the wire diameter, tin coating should not flake and crack.

Allowed the heterogeneity of the surface of the wire by color, subject to compliance with the tests on the quality of the coating.

Customer’s request wire must withstand a winding on a cylindrical core with a diameter equal to the diameter of the wire.

2.5, 2.6. (Changed edition, Rev. N 2).

2.7. The tin coating must be chemically resistant and withstand two cycles of immersing in the solution of hydrochloric acid and potassium relatoseroticos.

2.8. Wire shall be manufactured in coils and in rolls, consisting of one segment. Winding wire should be the correct separatornyi rows and to permit free spooling of wire from the coils and coils. During the liberation from the bindings of a coil wire not be withdrawn in «eight».

(Changed edition, Rev. N 1).

2.9. Weight of a coil of wire must conform to the standards given in table.3. Weight of wire on the coil is set by agreement between the consumer and the manufacturer.

Allowed in the party not more than 10% of the skeins of reduced mass.

Table 3

(Changed edition, Rev. N 1, 2).

2.10. (Deleted, Rev. N 1).

2A. ACCEPTANCE RULES

2A.1. Wire take parties. The party should consist of wire of the same size, the same strength and must be issued a document about quality that contains:

is the trademark or name and trademark of manufacturer;

— designation of wire;

— results of the control tests;

— the number of coils or coils of wire;

the weight of the party;

— the batch number.

2A.2. The appearance and size of check wire on each reel or coil of wire.

2A.3. To check the mechanical properties and quality of the tin coating from the party take 5% skeins or coils, but not less than three skeins or coils.

2A.4. The test weight of the skeins or coils is carried out on 3% skeins or coils.

2A.5. If unsatisfactory test results of at least one of the indicators it is carried out re-tests on twice the number of coils, the number of not passed tests. The results of repeated tests apply to the entire party.

Sec. 2A. (Added, Rev. N 1).

3. TEST METHODS

3.1. For each type of test must be selected one sample from both ends of each of the selected coils or outer end of the coil.

(Changed edition, Rev. N 1).

3.2. Diameter and ovality of wire measured with a micrometer according to GOST 6507 in two mutually perpendicular directions of the same section.

(Changed edition, Rev. N 2).

3.3. Test wire tensile and rupture with the node is carried out according to GOST 10446.

3.4. Test wire torsion is carried out according to GOST 1545.

3.5. The adhesion strength of tin coating with the base metal test according to GOST 10447.

3.6. Chemical resistance tin coating check in chemically pure hydrochloric acid density 1,088 g/cmwith subsequent identification of the naked sites 2.5% strength solution of chemically pure potassium relatoseroticos.

The samples with 150 mm in length cut from a coil or coils with a sharp tool, avoiding buckling and bending wire.

When testing wire, the temperature of the filtered solutions of hydrochloric acid and potassium relatoseroticos should be 15−17 °C.

Before the test, the sample wire to remove dirt and grease washed with gasoline, benzene or ether, and then further distilled water. The washed samples wipe dry with cotton or a clean cloth and immerse in a hydrochloric acid solution for 1 min, then a solution of potassium relatoseroticos for 30 s, and then immediately washed in water. Samples with cotton wipe or clean cloth and the whole cycle repeat dives.

The depth of immersion of samples in solutions of 100 mm.

Samples of wire must be solutions of acid and potassium relatoseroticos stationary, not in contact with each other and with the walls of the vessel.

Wire considered satisfactory if, after two dives on its surface does not appear blue spots or faint blue coloration of the entire surface or entire sections of the blue or dark color.

Allowed blue wire surface at the height of the solution level and at a distance of 20 mm from the immersed in the solution of end of the wire.

The same solution of hydrochloric acid and potassium relatoseroticos with a volume of 200 cmcan be used for continuous testing no more than 100 samples of wire.

3.3−3.6. (Changed edition, Rev. N 1).

4. PACKAGING AND LABELLING, TRANSPORTATION AND STORAGE

4.1. Each coil of wire shall be securely tied with wire wound end (end).

4.2. Allowed coils of wire of the same diameter and the same strength tie-in Bay. Each Bay needs to be tied in at least three places soft tinned wire according to normative-technical documentation or twine according to GOST 17308. Hanks to the reduced mass associated to a separate Bay.

4.1, 4.2. (Changed edition, Rev. N 1).

4.3. Wire with preservative oil (lubricant) do not cover. Customer’s request wire coated with paraffin.

4.4. Bay, loops or coils of wire must be Packed in a waterproof paper according to GOST 8828 or paraffined paper GOST 9569 and tightly Packed in steel cans according to normative-technical documentation with durable seam, ensuring the safety wire, or metal containers according to normative-technical documentation with sealing gaskets in the lids.

Cans or containers must be lined with waterproof paper inside churchyard 8828 or waxed according to GOST 9569, or cardboard cushioning GOST 9347, or cardboard box according to GOST 7933.

Wire wrapping, sent to the far North and equated to them districts, must comply with GOST 15846.

4.5. The weight of each package should not exceed 80 kg. On agreement between the consumer and the manufacturer allowed the delivery of packages with weight.

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

4.6. For each coil, separate coils or coil shall be securely attached label stating:

a) the trademark or name and trademark of manufacturer;

b) legend wire;

C) the number of skeins in the Bay;

g) the batch number.

4.3−4.6. (Changed edition, Rev. N 1, 2).

4.7. On every can or container must be specified:

a) trademark or the name and trademark of manufacturer;

b) designation of wire;

C) net mass of wire;

d) the number of coils or skeins;

d) date of manufacture;

e) the batch number.

(Changed edition, Rev. N 1).

4.8 (Deleted, Rev. N 1).

4.9. Transport marking under GOST 14192.

(Added, Rev. N 1).

4.10. Wire is transported by all kinds of transport in covered vehicles in accordance with cargo carriage regulations applicable to transport of this species. Stowage and securing of cargoes transported by rail, must comply with the technical conditions of loading and fastening of cargoes, approved by the Ministry of Railways of the USSR. Transportation of the wire rail is held carload or small shipments.

Conditions of transportation of the wire must meet the conditions 5 GOST 15150.

(Changed edition, Rev. N 2).

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

(Added, Rev. N 1).