GOST 26366-84

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  ГОСТ 26366-84

GOST 26366−84 brass-plated steel Wire for bead rings of tyres. Specifications (with Amendments No. 1, 2)

GOST 26366−84
Group V72

INTERSTATE STANDARD

STEEL BRASSED WIRE FOR
BEAD RINGS OF TYRES

Specifications

Brass-plated steel wire for bead rings of tyres.
Specifications

ISS 77.140.65
OKP 12 2100

Date of introduction 1985−07−01

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 19.12.84 N 4636

Change No. 2 adopted by the Interstate Council for standardization, Metrology and certification 15.04.94 (report of the Technical Secretariat N 2)

The adoption voted:

3. INTRODUCED FOR THE FIRST TIME

4. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS

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

6. EDITION with Amendments No. 1, 2 approved in September 1989 and April 1996 (IUS 1−90, 7−96)


This standard applies to steel cold drawn carbon lutunasobasoba wire is intended for manufacturing of bead rings of tyres.

1. TYPES AND BASIC DIMENSIONS

1.1 a. Wire produced types 1L and 1ЛА.

(Added, Rev. N 1).

1.1. Wire produced with a diameter of 1.0 mm.

1.2. Tolerances for the wire diameter should be not more than ±0.03 mm.

Customer’s request wire produced with the limit deviation for diameter ±0.02 mm.

(Changed edition, Rev. N 1).

1.3. The roundness of the wire must not exceed half the tolerance on the diameter.

Examples of symbols:

Brass coated wire, diameter: 1.0 mm, type 1L:

Wire 1L GOST 26366−84

The same type 1ЛА:

Wire 1ЛА GOST 26366−84.

(Changed edition, Rev. N 1).

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. Wire shall be manufactured from wire rod, carbon steel according to normative-technical documentation. It is possible to manufacture wire of steel according to GOST 14959 host 1050.

2.3. Brass coating should be no gaps. On the surface of the wire is not allowed traces of corrosion.

Allowed traces of drawing, and in the welding areas of the violation of the brass coating is not more than 10 mm.

(Changed edition, Rev. N 1).

2.4. The mechanical properties of the wire and the bond strength with rubber (adhesion) shall be as specified in table.1. Rupture strength at the weld shall not be less than 50% of the minimum specified in the table.1.

Table 1

Note. By agreement with the consumer it is allowed manufacture of wire-type 1L with the number of twists of not less than 22.

2.5. The wire must be in equilibrium. Wire types 1ЛА, 1L is considered to be in equilibrium if the length of wire 3 m long lying in one plane, without the wavy sinusoidal formations, has a deflection not exceeding 400 mm.

By agreement between manufacturer and consumer wire type 1L to 01.01.98 is considered to be in equilibrium if the length of wire 3 m long lying in one plane, without the wavy, sinusoidal formations, has a deflection of more than 400 mm, or forms a ring with diameter not less than 800 mm «no eights».

(Changed edition, Rev. N 2).

2.6. The wire is wound on a metal reel, manufactured according to normative-technical documentation. By agreement between manufacturer and consumer wire is manufactured in coils. Weight of wire on bobbin (reel) should be 370−500 kg.

2.7. Wire type 1ЛА wound on reels or coils shall consist of one segment.

Wire type 1L on the coil (reel) no more than two segments.

2.8. In the coil (reel) of wire is allowed no more than five welds. The quality of the weld is ensured by the fabrication technology. Limit deviations of the diameter at the weld shall be in accordance with the requirements set forth in paragraph 1.2.

2.5−2.8. (Changed edition, Rev. N 1).

2.9. The winding of the wire on the coil (in a coil) should be carried out without entanglement of the coils and to permit free spooling of wire from a coil (coils).

2.10. Mass fraction of copper in the brass coating and a weight of brass coating is given in Annex 1.

2.9, 2.10. (Added, Rev. N 1).

3. ACCEPTANCE RULES

3.1. Wire take parties. A lot is the number of coils, followed by one document about quality that contains:

trademark or the name and trademark of manufacturer;

the batch number (the document number on the quality);

symbol wire;

weight of wire (gross, net);

the number of coils;

the date of shipment;

the results of the tests;

stamp of technical control Department.

(Changed edition, Rev. N 1).

3.2. To check the quality of wire taken from the party:

to check the appearance and diameter of the coil;

to check the temporary tear resistance, elongation, number of twists, number of bends, bond strength with rubber (adhesion) and equilibrium — 10% coils, but not less than 5 coils from the party.

3.3. If unsatisfactory test results of at least one of the indicators, repeat tests are carried out on this figure is twice the number of coils (coils) that hasn’t been tested. The results of repeated tests apply to the entire party.

4. TEST METHODS

4.1. To test the rupture strength, elongation, twisting, kinks, the bond strength with rubber (adhesion) take one sample of wire from each coil check.

4.2. Inspection of the wire surface is carried out visually without the use of magnifying devices.

The length of the area of violation of the brass coating at the weld, the manufacturer does not control, guarantee and manufacturing technology.

(Changed edition, Rev. N 1).

4.3. Wire diameter is measured with a micrometer according to GOST 6507 in two mutually perpendicular directions of the same cross-section in at least three places.

4.4. Test the wire for rupture strength and elongation carried out at the working length of the sample 100 mm according to GOST 10446.

Testing of the weld at the factory are not carried out.

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

4.6. Test wire to the excesses carried out according to GOST 1579.

4.7 Test of wire bond strength with rubber carried out at the N-method and the method of BISFA. The differences used N-method.

Bond strength with rubber (adhesion) test it by removing the wire from rubber unit (H-method) on a tensile testing machine with the scale of loads up to 980 N (100 kgf) and speed of movement of the lower clamp 100 mm/min test Samples having the form of two rubber bands connected by a wire (Fig.1), are made as follows:

calender sheets (3,5) mm and (5.5) mm from the raw rubber compound 2E-1155, manufactured according to normative-technical documentation, cut into strips with a width of 9−10 mm;

strips with a thickness of 3.5 mm is placed in a heated form (Fig.2), is placed across them samples of wire, on which are placed strips of rubber with a thickness of 5.5 mm. allowed the use of rubber in the thickness of 4,5mm;

Damn.1. Sample for test (H-method)

Sample for test (H-method)

Damn.1

Damn.2. Element of the mold for vulcanization of the samples (H-method)

Element of the mold for vulcanization of the samples (H-method)

Damn.2

the form is closed with the lid, set between the plates of a press maintained at a temperature of (142±4) °C for 45 min under a load of not less than 245 N/cm(25 kgf/cm).

Preparation of rubber samples and the test conducted no earlier than one day after vulcanization.

For fixing the samples on a tensile testing machine using special clips (Fig.3).

Damn.3. Scheme and dimensions of the holder for the test sample (for N-method)

Scheme and dimensions of the holder for the test
sample (N-method)

Damn.3

Indicator of strength of connection of the wire with rubber (adhesion) for each of the selected coil (coils) shall be the amount equal to the average test result of four pieces of wire in the test sample.

Bond strength with rubber by the method of BISFA test on the samples, which are embedded in vulcanised rubber block section 12,5x12,5 mm using a rubber compound of a type 2E-1155.

Prepare 16 samples of wire length less than 50 cm Cut two rubber strips thickness (7,0) mm, length according to size of mold. Lay one strip of the mixture in the mold (Fig.4), socket — samples of wire, and top with a second strip of rubber mixture and close the lid.

Damn.4. Element of the mold for vulcanization of the samples (by the method of BISFA)

Element of the mold for vulcanization of the specimens
(by the method of BISFA)

Damn.4

Allowed the use of rubber in other thicknesses, providing the standard rubber block with the following dimensions:

thickness 12,5 mm;

height 12.5 mm;

the distance between the threads is 12.5 mm.

Sample sizes determined by the size of the mold and after curing do not control.

The mode of curing: temperature (142±4) °C, pressure of not less than 2.5 N/mm(0,25 kgf/mm), time — 45 min.

Testing of samples is carried out one day after vulcanization. The exposure time can be reduced to 16 h. the Test is performed by pulling the wire from the rubber block on a tensile testing machine (measurement accuracy of 0.5%) on a scale of loads not exceeding five times the value of adhesion is given in table.1, with the loading rate of the active capture (100±10) mm/min specimen Mounting should ensure the alignment of the applied load to the sample. For fixing the samples on a tensile testing machine used special holders (Fig.5).

Damn. 5. Scheme and dimensions of the holder for the test sample (by the method of BISFA)

Scheme and dimensions of the holder for the test sample
(by the method of BISFA)

Damn. 5

The result of the test of bond strength with rubber taking the arithmetic average of the four measurements from each check the coil (coils).

4.8. In determining the equilibrium of a segment of wire of length 3 m is freely placed on the plane and measure the deflection of the segment of wire or the diameter of the formed ring metal ruler according to GOST 427, measuring tape according to GOST 7502 or other measurement tool.

(Changed edition, Rev. N 1).

4.9. The method of measuring the mass fraction of copper in the brass coating and the mass of brass coating on the wire is given in Annex 2.

(Added, Rev. N 1).

5. PACKING, MARKING, TRANSPORTATION AND STORAGE

5.1. The outer end of each segment of wire must be fixed on the coil cheek and easy to find. Cheek of the coil must project beyond the outer layer of wire is wound not less than 20 mm.

(Changed edition, Rev. N 1).

5.1. Each coil of wire shall be securely tied with wire by GOST 3282или packing tape according to GOST 3560, or wire or tape according to another normative-technical documentation not less than four places, ensuring the safety of the form of a coil.

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

5.1 b. Each coil of wire is placed on a cardboard disk, and then packing in polyethylene shrink GOST 25951.

To absorb moisture to the inside of a coil embedded silicagel according to GOST 3956 at the rate of 1 kg/m, Packed in bags of a fabric according to GOST 29298, or other similar fabrics.

On the outer side of the coil overlaps the cardboard strip with subsequent fixation wire according to GOST 3282 or packing tape according to GOST 3560, or other wire or tape according to normative-technical documentation.

Cardboard disc a cardboard and a strip of cardboard according to GOST 7376. It is possible to use other types of packaging materials manufactured according to normative-technical documentation does not deteriorate the quality of the packaging.

5.1 a, 5.1 b. (Added, Rev. N 1).

5.2. The wire on the coils must be wrapped and waxed paper according to GOST 9569, then the polyethylene film according to GOST 10354, or another polymer film, made according to normative-technical documentation.

Allowed instead of paraffined paper GOST 9569 apply a two-layer wrapping paper according to GOST 8828 or other paper made according to normative-technical documentation and providing protection from corrosion.

Allowed other types of packaging, ensuring the safety wire from corrosion.

Packaging fix the wire with the step, ensuring the safety of the packaging.

The formation of skeins in the transport packets is carried out according to GOST 24597 and GOST 21650.

(Changed edition, Rev. N 2).

5.3. On the cheek of each coil (reel) shall be securely attached a label, which indicate:

trademark or the name and trademark of manufacturer;

symbol wire;

batch number;

the date of manufacture of the wire;

weight (gross, net) wire.

5.4. Transport marking under GOST 14192.

5.5. Wire transporterowych all types of transport in covered vehicles, in accordance with the rules of goods carriage, valid for this mode of transport. The wire transport by rail is carried out carload or small shipments.

Allows for the transportation of wire in the containers according to GOST 18477.

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.

(Changed edition, Rev. N 1).

5.6. Storage wire — on conditions 2 GOST 15150.

6. MANUFACTURER’S WARRANTY

6.1. The manufacturer guarantees that the steel brassed wire for bead rings of tires with the requirements of this standard, under the conditions of storage and transportation.

Warranty period of storage in original package 4 months from the date of manufacture of the wire.

ANNEX 1 (reference)

ANNEX 1
Reference

Mass fraction of copper in the brass coating (67±6)%.

Mass of brass coating was 0.8−1.7 g/kg for wire type 1ЛА and 0.8−2.5 g/kg for wire type 1L.

APPENDIX 2 (recommended). The METHOD of determining the mass fraction of copper in the brass coating on the wire for bead rings of tyres

ANNEX 2
Recommended

This method sets the photometric method of measuring the mass fraction of copper in the range of 60 to 75% in the brass coating on the steel wire.

The method is based on formation of blue coloured complex compounds of copper with ammonia (=675 Nm). Brass coating is dissolved from the surface of the wire in a dilute solution of ammonia in the presence of oxidizing agents. The color intensity of the copper-ammonia complex is measured on a photoelectrocolorimeter.

1. Measuring instruments, reagents, solutions

Photoelectrocolorimeter or spectrophotometer any brand with all accessories.

Laboratory scales for General purpose according to GOST 24104*, of the 2nd accuracy class with the largest weighing limit of 200 g or any other scale that meets the specified requirements for their metrological characteristics.
_____________________
* From 1 July 2002 was put into effect GOST 24104−2001.

Drying oven with temperature 100 °C.

Laboratory glassware measuring glass (pipettes, burettes, volumetric flasks, beakers etc.) according GOST 1770, NTD, or believed by GOST 8.234.

Distilled water according to GOST 6709.

Sulfuric acid according to GOST 4204, diluted 1:1.

Nitric acid according to GOST 4461 or GOST 11125, diluted 1:1.

Ammonium neccersarily according to GOST 20478.

Ammonia water according to GOST 3760 and diluted 1:1.

State standard samples (GSO) copper, brass.

Copper metal of high purity according to GOST 546.

The technical rectified ethyl alcohol according to GOST 18300.

Petrol is a solvent for paint industry (white spirit) according to GOST 3134.

Carbon tetrachloride according to GOST 20288.

Cleaning material such as cotton.

Filter paper according to GOST 12026.

2. General requirements to ensure the accuracy
the results of the analysis

2.1. All reagents must have a qualification not lower than «h. d. a.».

2.2. Calibration curve building at least once per shift not less than five points, distributing them evenly throughout the range of the designated concentrations.

2.3. Mass fraction of copper is determined in two parallel dimensions. The arithmetic average of the two measurements taken for result analysis.

2.4. The error of the measurement result at p = 0.95 does not exceed the limit specified in the table.2.

2.5. The discrepancy between the results of two parallel measurements must not exceed the values specified in table.2, at a confidence level of 0.95. If this discrepancy exceeds the tolerance, we carried out two parallel measurements repeated; if repeated measurements of the divergence exceeds the allowable value, then the result of the analysis recognize the incorrect measurements cease to identify and address the causes of the high dispersion of results.

2.6. The divergence of the two middle results of an analysis performed in different conditions, should not exceed the values specified in table.2, at a confidence level of 0.95.

2.7. All results that differ from standard border less than the amount specified in the table. 2, subject to re-determination with the establishment of the mass fraction of the component in the sample, as is the overall average value of initial and repeat analysis results.

2.8. Monitoring the error of the average result analysis is carried out daily according to the standard solution (CP) of copper, prepared from GSO copper or brass.

The average result of the analysis of the CP should not differ from the certified value more than the amount specified in the table.2.

2.9. The numerical value of the result of the analysis must end with the same number of discharges, and the corresponding error value .

3. Preparation for measurements

3.1. Preparation of test solution: 10 g naternicola ammonium are dissolved in 500 cmof distilled water, adding 75 cmof concentrated ammonia and dilute with water to volume of 1000 cm.

3.2. Preparation of a standard solution of copper sulphate: 1 g of metallic copper (GSO) was dissolved with heating in 25−30 cmof nitric acid, diluted 1:1, add 25 cmof sulphuric acid diluted 1:1 and the solution evaporated until the appearance of sulphuric acid fumes. After cooling the salt is dissolved in water, transfer the solution into volumetric flask with a capacity of 1 DM, made up to the mark with water and mix.

1 cmof the solution contains 0.001 g of copper.

3.3. Construction of calibration curve

Five volumetric flasks with a capacity of 100 cmmeasured to the standard copper solution in the amount of 4, 6, 8, 10, 12 cm, which corresponds to 0,004; 0,006; 0,008; 0,010; 0.012 g of copper. Sixth bulb is used for the reference experiment. All six flasks poured exactly 30 cmof the test solution, 10 cmof ammonia, diluted 1:1, adjusted to the mark with water, mix.

Optical density of the solution measured on photocolorimetry in the region of wavelengths of 630−670 Nm in a cuvette with the thickness of the light absorbing layer is 50 mm with a red filter. Solution comparison is water. On the found values of optical density and corresponding weight values of copper to build the calibration graph.

3.4. Sampling and sample preparation

From the coil wire are selected sequentially one after the other two cut about 2−2,2 m each. Selected segments of the wire is degreased, or nakazyvaet cut into small pieces or twist in the spiral.

4. Measurements

Weighed on an analytical balance at least 10 g wires, and the mass removed was brass 0,0080−0,0160 g for each parallel dimension. The sample is immersed in a glass cylinder or test tube, pour 30 cmof the test solution, so that the wire was completely covered, and held until the dissolution of brass. The solution was quantitatively transferred to a volumetric flask with a capacity of 100 cm, and sample the dishes three times washed with water and the washings are attached to the main solution.

Samples of the wire is rinsed with alcohol or other solvent, dried with filter paper and dried in an oven at (100±5) °C for 10 min and weighed again.

The mass difference between the first and second weighings is the weight of brass taken for analysis.

In a volumetric flask with a solution of copper-ammonia complex after removing the brass coating is poured 10 cmof ammonia, diluted 1:1, adjusted to the mark with water, mix. The optical density measured on photocolorimetry in the region of wavelengths of 630−670 Nm with a red filter in a cuvette with a working length of 50 mm. as a solution of comparison used water.

Mass of copper found by the calibration schedule.

5. Processing of the results

5.1. Mass fraction of copper (), %, is calculated by the formula

,

where is the mass of the sample before the removal of the coating, g;

 — the mass of the sample after removing the coating, g;

 — the mass of copper in the sample was found in the calibration schedule,

5.2. Mass of brass coating wire (), g/kg, calculated by the formula

.

6. Norms of accuracy and norms of precision control
measurements, percent absolute

Table 2

The text of the document is verified by:
the official publication of the
Wire metal. Part 3: Sat. Standards. -
M.: IPK Publishing house of standards, 2003