GOST 9850-72

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  ГОСТ 9850-72

GOST 9850−72 galvanized steel Wire for cable cores. Technical specifications (with Changes 1−5 N)

GOST 9850−72
Group V72

INTERSTATE STANDARD
GALVANIZED STEEL WIRE FOR CORE WIRE
Specifications

Zinc-coated steel core wire for conductors.
Specifications

ISS 77.140.65
OKP 12 2100

Date of introduction 1974−07−01

INFORMATION DATA

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

2. APPROVED AND put INTO EFFECT by Decision of the USSR State Committee for standards from 07.12.72 N 2214

3. REPLACE GOST 9850−61

4. The standard meets the standard IEC 888−87 in part of wire, types A and B

5. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS

6. Limitation of actions taken by Protocol No. 4−93 of the Interstate Council for standardization, Metrology and certification (ICS 4−94)

7. EDITION Changes N 1, 2, 3, 4, 5, approved in August 1979, February 1983, December 1984, may 1987, June 1989 (IUS 9−79, 5−83, 4−85, 8−87, 10−89)


This standard applies to steel galvanized wire round, designed for the manufacture of cores and uninsulated steel-aluminum wires.

(Changed edition, Rev. N 5).

1. TYPES AND BASIC DIMENSIONS

1.1. Wire classification:

mechanical properties of classes: A, B, C (class b is used for repair work);

for limiting deviations and surface density of zinc on the groups: 1 and 2;

by appointment grades:

for solid cores — OS

for stranded cores — MS.

(Changed edition, Rev. N 5).

1.2. (Deleted, Rev. N 5).

1.3. The diameter of the wire and limit deviation shall be as specified in table.1.

Table 1

mm

Notes:

1. By agreement between the consumer and the manufacturer shall manufacture the wire with the negative extreme deviations, equal to a field of the tolerance for the diameter, and the wire class B plus with the extreme deviations, not to exceed the tolerance on the diameter.

2. It is possible to manufacture wire In with plus extreme deviations not exceeding the tolerance on the diameter.

1.4. Customer’s request wire manufacture intermediate diameters. Maximum deviations in diameter must conform to the next higher diameter.

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

Examples of symbols:

A wire core wire, class A, group 1, grade OS, with a diameter of 2.00 mm:

Wire A-1-OS-2 GOST 9850−72

Wire core wire class B, group 2, grade MS, with a diameter of 3,50 mm:

Wire B-2-MS-3,5 GOST 9850−72

1.3 — 1.5. (Changed edition, Rev. N 5).

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 rope shall be manufactured from wire rod according to the normative and technical documentation or quality carbon steel sub-groups according to GOST 1050, or carbon steel according to GOST 14959.

(Changed edition, Rev. N 3, 5).

2.2. Surface density of zinc and the number of one-minute dives must comply with the requirements of table.2.

Table 2

Note. Surface density of zinc and the number of dives for intermediate wire diameters shall be the values taken in table.2 for the nearest wire of smaller diameter.


(Changed edition, Rev. N 3).

2.3. The zinc coating on the wire must be continuous, without gaps or cracks visible without using the magnifying devices.

Slight risks, the local roughness of the zinc coating in the form of individual tubercles and separate nodules of zinc, the wire diameter is 1.5 to 2.65 mm and a size not more than 0.10 mm, diameter of 2.80 to 4.50 mm with the size not more than 0.12 mm, measured from the actual diameter, the heterogeneity of the surface of the wire by color, white spots and gloss, and white patches, if upon removal the coating can withstand the number of dives specified in the table.2.

(Changed edition, Rev. N 1, 5).

2.4. The wire when wound on the cylindrical rod with the diameter specified in the table.3, must not break. The zinc coating during winding, the wire must be sturdy, must not crack and flake off. The number of turns must be at least eight.

Table 3

(Changed edition, Rev. N 4, 5).

2.5. Mechanical properties of the wire shall be as specified in table.4.

Table 4

(Changed edition, Rev. N 5).

2.6. (Deleted, Rev. N 4).

2.7. Wire shall be manufactured in coils or on reels. The winding of the wire should be in regular rows, without entanglement of the coils and to permit free spooling of wire from the coils and coils. A coil of wire must consist of a single segment wire. On the coils is allowed no more than three pieces of wire of the same brand, same group and same diameter. At the separating of the segments must be laid bookmarks. Linking all segments of wire on the coil is not allowed. Allowed instead of separating display and attach on the cheek of the coil ends of the wire.

(Changed edition, Rev. N 3).

2.8. Welding of the finished wire shall not be allowed. Allowed welding wire of the workpiece before cold drawing; the wire of the class In marks MS is allowed to weld prior to galvanizing.

2.9. Weight of coil or cut wire on the coil should be as given in table.5. Norms valid till 01.01.92.

From 01.01.92 wire shall be manufactured in coils or on reels of multiple exact lengths specified by the user, with a tolerance of %.

Table 5

Note. Permitted coils or segments of wire on reels weighing 50% less than shown in table.5 not more than 2% of the volume of the party wire brand OS class V.

2.8, 2.9. (Changed edition, Rev. N 5).

3. ACCEPTANCE RULES

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

trademark or the name and trademark of manufacturer;

symbol;

the weight of the party;

the results of the tests.

(Changed edition, Rev. N 3, 5).

3.2. Inspection and diameter measurement is subjected to each coil or coil. Inspection of produce visually. The test mass coil or coils to produce two or three coils or coils from the party.

3.3. To check the mechanical properties of wire and the quality of zinc coating from the party, adopted in appearance and size, select 10% skeins or 5% of the coils, but not less than five coils or three coils.

3.4. If unsatisfactory test results of at least one of the indicators it is carried out re-tests on twice the number of samples taken from those not being tested. The results of repeated tests are final and apply to the entire party.

4. TEST METHODS

4.1. Visual inspection of the wire produce visually.

4.2. Diameter and ovality of wire measured with a micrometer according to GOST 6507 in two mutually perpendicular directions of the same section. To measure the diameter choose a section of wire with a smooth surface, without nodules.

(Changed edition, Rev. N 5).

4.3. For testing the mechanical properties of the wire must be selected one sample from each of the selected coils or the coils and for checking the quality of the zinc coating shall be selected at least two samples from each of the test coil or coils.

Tensile strength and elongation is determined according to GOST 10446. The elongation is measured on a test length of 200 mm.

Tensile strength and stress at 1% elongation is calculated by the nominal diameter of the wire.

Tensile strength, stress at 1% elongation and elongation is determined on a tensile testing machine. The sample intended for testing, there should be curves. The length of the test specimen shall not be less than 300 mm. Determination of stress at 1% elongation produced by the method specified in the application.

After determining the stress at 1% elongation to the subject sample is applied load up to its rupture to determine the strength and elongation.

(Changed edition, Rev. N 3).

4.4. The test of wire on the winding is carried out according to GOST 10447.

4.5. The strength of the zinc coating and the strength of its adhesion with the base metal is tested in accordance with the requirements of section 2.4 of this standard and GOST 10447.

If the winding around the core of the established diameter of the coating does not delaminate and does not crack to such an extent that the zinc can be removed by rubbing with a hand covering is satisfactory.

4.6. The resistance test is carried out in a solution of copper sulphate, prepared by dissolving one part by weight of dry crystal of copper sulphate according to GOST 4165 in five weight parts of distilled water and neutralized with an excess of freshly precipitated hydrate of copper oxide. After neutralization the solution should be filtered. The density of the filtered neutralized solution should be 1,114−1,116 g/cm.

The temperature of the solution of copper sulphate during the test must be (18±2) °C. the test procedures are the following:

a) take samples of the wire length of 150 mm, washed with alcohol, gasoline or benzene to remove dirt and fatty substances and wipe with a clean cloth. If the samples are washed with petrol or benzene, to produce additional rinsing them with distilled water and wipe to remove moisture;

b) immerse the samples in a solution of copper sulphate to a depth of not less than 100 mm. Before each subsequent immersion in the solution samples were washed in distilled water and wiped with a clean cloth. Samples of wire must be in solution in stationary position, not in contact with each other and with the walls of the vessel.

The same solution of copper sulphate with a volume of 200 cmcan be used for the test: no more than 20 samples, the wire diameter is from 1.5 to 2.8 mm, or not more than 8 samples with a diameter of 2.85 to 4.5 mm, after which the solution should be replaced.

After the test allowed the redness of the surface of the wire in the area, located at the height of the solution level at the distance of 10 mm from the solution level and at a distance of 20 mm from the immersed in the solution of the lower end of the wire.

If the resistance test wire did not survive the required number of dives, but has shown satisfactory results when determining the mass of zinc, the wire is considered suitable.

4.7. Surface density of zinc wire determine the weight or volume-gasometrical method. The weight method is used for very precise definitions and arbitration tests.

Length samples of wire, used to determine the surface density of zinc weight or volume-gasometrical method, are shown in table.6.

Table 6

The samples are allowed to cut into any number of segments depending on the test conditions.

4.7.1. Weight method

The average surface density of zinc is determined by dissolving the coating from the samples of wire in a solution of inhibited sulphuric acid prepared in the following manner: 2 g of inhibitor SbOor AsOdissolved in 60 cmof hydrochloric acid according to GOST 3118 (density of 1.19 g/cm) and made up to 1 DMwith sulfuric acid according to GOST 4204концентрации 80 g/DM.

The bleed solution is replaced as it is exhaustion.

The order of testing the following:

a) the samples degreased in alcohol, benzene, or gasoline and wipe with a clean cloth;

b) weigh the sample;

C) dissolve the zinc coating;

d) the samples are washed in distilled water;

d) wipe with a clean cloth to remove moisture;

e) samples are weighed again;

g) measure the actual diameter (after grazing);

h) calculate the average surface density of zinc on 1 mof wire (a) in grams by the formula

,

where is the mass of the specimen of wire (or group of samples) before removing the coating, g;

 — the mass of the wire specimen (or group of samples) after removing the coating, g;

 — diameter of the wire specimen after the etching of the coating, mm.

Values and determine to the nearest 0.001 g with a precision up to 0.010 mm, the value of the average surface density of zinc , with an accuracy to 0.1 g/m.

Surface density of zinc coil or coil wire is evaluated by arithmetic mean of the results of the test

th.

4.7.2. Space-gasometrical method

The dissolution of the zinc coating is carried out in a device consisting of a reservoir and connected to it with a rubber hose, a glass burette with two taps, or in the device, consisting of burettes and surge vessel. Tube surge vessel must be tightly prichert to the walls, so that the released hydrogen could not push.

Removing zinc coating produced in full immersion of the samples in the solution at ambient temperature until the cessation of gassing. The test is carried out separately for each sample in the following order:

a) take samples of wire and measure set for the test length. Sampling produce at least 0.5 m from one another;

b) degreased wire samples in alcohol, benzene, or gasoline and wipe with a clean cloth;

in) dissolved zinc coating that completely catch released when the hydrogen;

g) measure the volume of the evolved hydrogen of each sample, and summarize its mean value leads to normal conditions (pressure of 760 mm Hg.St., temperature 0 °C);

d) calculate the average surface density of zinc () in grams by the formula

,

where is the arithmetic average of the volume of hydrogen under normal conditions, cm;

 — the nominal diameter of the wire specimen, mm;

 — length of sample, mm.

Mass of zinc coating coil or coil wire is evaluated by arithmetic mean of the results of testing at least two samples.

Bleeding zinc is produced in an aqueous solution of the mixture of acids:

sulfuric acid according to GOST 4204 — 100 g/DM;

hydrochloric acid according to GOST 3118 — 34 g/DMor in a solution of inhibited sulphuric acid of the composition specified in claim 4.7.1.

The 4.7−4.7.2. (Changed edition, Rev. N 3).

4.8. The length of wire on a reel or on a spool is determined by calculation. Allowed other ways of determining agreed upon between consumer and manufacturer.

(Added, Rev. N 5).

5. PACKING, MARKING, TRANSPORTATION AND STORAGE

5.1. Each coil shall be securely tied with a soft wire according to GOST 3282, or another wire at the normative and technical documentation or bonded to the castle band graveyard 3560 in at least three places evenly spaced around the circumference.

The ends of the wire on the roll must be neatly stacked and easy to find.

The upper end of the cut wire on the coil should be mounted on the coil cheek.

(Changed edition, Rev. N 2, 5).

5.2. Each coil of wire shall be wrapped with a layer of paper, then a layer of a polymeric film or nonwoven materials, or woven fabrics of the chemical fibers. Mechanized packaging a coil of wire must be wrapped with a layer of cable crepe paper according to GOST 10396 or paper brand CMS-170, or other creped paper, equal in protective properties, or a polymer film with simultaneous locking packaging wire according to GOST 3282, or another wire.

Coil wire should be wrapped with a layer of paper or non-woven materials, 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.

When transporting in covered wagons or in containers on request of consumer the wire does not pack.

(Changed edition, Rev. N 2, 3, 4).

5.3. Coils of wire of the same brand, same diameter, and one group is allowed to associate in the Bay.

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

(Changed edition, Rev. N 5).

5.4. To each coils, the coil or the Bay shall be securely attached a label, which indicate:

trademark or the name and trademark of manufacturer;

symbol wire;

the mass of the wire net;

the length of wire on a reel, and the reel number of segments and their total length; with 01.01.92 the length of each segment.

Coils with lower mass segments (see note to p.2.9) must have an additional marking.

Transport marking under GOST 14192.

(Changed edition, Rev. N 2, 5).

5.5. (Deleted, Rev. N 3).

5.6. Wire transporterowych by all kinds of transport in accordance with cargo carriage regulations applicable to transport of this species. Transportation of the wire rail is carload or small shipments.

Stowage and securing of cargoes transported by rail, must comply with the rules 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.

(Changed edition, Rev. N 3, 5).

5.7. Storage of wire — under the terms of 3 to GOST 15150.

(Changed edition, Rev. N 3).

5.8. The wire is shipped to the far North and remote areas, Packed in accordance with GOST 15846.

(Added, Rev. N 3).

APP. TEST THE WIRE FOR VOLTAGE WITH 1% ELONGATION

APP

1. The sample should be applied load as indicated in the table. This load can be supported until until the sample is marked, the corresponding test length, the extensometer is installed at the level specified in the table in accordance with the chosen reference length. The clamps of the extensometer does not have to be placed at the elevations of the control sample length.

2. Then the load should be increased as long as the extensometer will not show elongation of 1%. At this point the machine stops and record the load amount where calculated stress at 1% elongation.