GOST 15598-70

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  ГОСТ 15598-70

GOST 15598−70 steel Wire strings. Specifications (with Amendments No. 1, 2, adjusted)

GOST 15598−70
Group B72

INTERSTATE STANDARD

STEEL WIRE STRING

Specifications

Steel piano wire. Specifications

ISS 77.140.65
OKP 12 2100

Date of introduction 1971−01−01

INTRODUCED by decree of the Committee of standards, measures and measuring instruments under the USSR Council of Ministers No. 296, dated 6 March 1970
Limitation of actions taken by Protocol No. 3−93 Interstate Council for standardization, Metrology and certification (ICS 5−6-93)
Edition with Amendments No. 1, 2 approved in March 1985 and October 1988 (IUS 6−85, 1−89)
AMENDED, published in the IUS N 9, 2005
An amendment made by the manufacturer of the database
This standard applies to steel wire intended for the manufacture of strings for musical instruments.

1. TYPES AND BASIC DIMENSIONS

1.1. Wire manufactured in two classes:

Class 1 — with high elastic properties;

Class 2 — with normal elastic properties.

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

Table 1

mm

Run extreme deviations of the wire of the 1st class in a single reel should not exceed 0.01 mm.

1.3. Ovality of the wire of the 1st class with a diameter of from 0.200 to 0,350 mm should be no more than 0.006 mm, with a diameter of 0.350 mm more not more than 0.01 mm Ovality of the wire of the 2nd class should be not more than 0.005 mm.

Example of designation wire class 1 diameter 0,800 mm:

Wire 1−0,800 GOST 15598−70.

Section 1. (Changed edition, Rev. N 2).

2. TECHNICAL REQUIREMENTS

2.1. Wire shall be manufactured in accordance with the requirements of the present standard of carbon steel with a mass fraction of carbon of 0.83 to 1.05% according to GOST 1050−88, GOST 14959−79, GOST 1435−99 or other regulatory-technical documentation.

Steel grade selects the manufacturer depending on diameter required mechanical properties of the wire.

2.2. Mechanical properties of the wire shall be as specified in table.2.

Table 2

Note. Conventional elastic limit of the wire of the 2nd class in diameters from 0.200 to 0,700 mm is introduced from 01.07.92.

2.1, 2.2. (Changed edition, Rev. N 2).

2.3. The surface of wire should be clean, bright, without traces of scale, rust, should have no defects visible to the naked eye. Surface roughness should not exceed Ra 0,32 µm according to GOST 2789−73.

Control of surface roughness of the exposed wire dia 0,775 mm or more.

(Changed edition, Rev. N 1, 2).

2.4. The wire must not break or crack after winding eight coils on the rod, the diameter of which is equal to the diameter of the tested wire.

(Changed edition, Rev. N 2).

2.5. The wire should not delaminate when tested in torsion.

The wire is considered proslavilsya, if when tested in torsion until fracture, the main fracture is smooth and perpendicular to the axis of the wire.

2.5 b. Wire dia 0,775 mm or more must be in equilibrium. The wire is considered to be in equilibrium if the length of wire 3 m long lying on the plane forms a ring with diameter not less than 350 mm.

2.5 a, 2.5 b. (Added, Rev. N 2).

2.5. Wire shall be manufactured in rolls, consisting of one segment. Winding wire should be the correct separatornyi rows and provide free winding wire coils.

During the liberation from the bindings of a coil wire not be withdrawn in «eight».

(Changed edition, Rev. N 2).

2.6. Weight of a coil of wire must conform to the standards specified in table.3.

Table 3

Note. Customer’s request wire produced weight coils up to 30 kg.


(Changed edition, Rev. N 1).

2.7. (Deleted, Rev. N 1).

3A. ACCEPTANCE RULES

3A.1. Wire take parties. The party should consist of wire made of the same steel grade, same diameter, same class, and must be issued a document about quality that contains:

trademark or the name and trademark of manufacturer;

symbol wire;

the results of the tests;

the number of coils;

the net mass;

batch number.

(Changed edition, Rev. N 2).

3A.2. The diameter and surface quality of the wire is checked for each reel.

3A.3. For testing temporary resistance, nabivanija, twisting from party wire selected 10% of the coils, but not less than three skeins of the party; to control the yield point is taken 5% of the skeins, but not less than three skeins.

Control of roughness of wire manufacturer conducts periodic, but not less than once per quarter. In this case select 5% of the skeins, but not less than three skeins of the party that passed acceptance tests.

3A.4. If unsatisfactory test results of at least one of the indicators, a second test on this indicator at twice the number of skeins. The results of repeated tests apply to the entire party.

If unsatisfactory results of the periodic tests tests translate into acceptance.

3A.3, 3A.4. (Changed edition, Rev. N 2).

3. TEST METHODS

3.1. For each test taken on the same sample of wire with the two ends of a coil.

3.2. Wire diameter is measured in two mutually perpendicular directions of the same cross-section lever-type micrometer according to GOST 4381−87 or other measurement means appropriate accuracy.

3.3. An external inspection is carried out visually without the use of magnifying devices.

3.4. Test wire tensile is carried out according to GOST 10446−80.

3.5. The test of wire on the winding is carried out according to GOST 10447−93.

3.6. Torsion testing two next to stacked samples is carried out according to GOST 1545−80на samples with a calculated length equal to 100. To twist the samples applied pre-tension force which should not exceed 2% of the total nominal breaking strength. Both samples are uniformly twisted along a helical line with a speed of not more than 60 rpm.

Test proslaivaet when twisting is carried out before the complete destruction of the sample. The torsion undergoes a single wire specimen.

Examination of the fractures produced without the use of magnifying devices.

3.7. The surface roughness of the wire is checked by profiling the profilers or other devices to control the roughness of the wire according to the method given in the Appendix.

3.8. Apparent yield stress is determined graphically by the tension diagram obtained in a tensile testing machine. Processing and calculation engine charts is carried out by the method of determination of the conditional yield strength in accordance with GOST 1497−84.

3.6−3.8. (Changed edition, Rev. N 2).

3.9. In determining the equilibrium of the piece of wire is placed freely on the plane and if the wire forms a ring, measure the diameter of the formed ring metal ruler according to GOST 427−75.

3.10. The weighing of packages of the party, and, if necessary, coils carried in the balance, ensure the weighing accuracy of 1%.

3.9, 3.10. (Added, Rev. N 2).

4. MARKING, PACKAGING, TRANSPORTATION AND STORAGE

4.1. Each coil of wire shall be tied in at least three places evenly spaced around the circumference of a coil wire according to GOST 3282−74 or other regulatory-technical documentation. Coils of wire of the same size can be connected in parcels. Weight of a coil (coils) must not exceed 80 kg.

(Changed edition, Rev. N 1).

4.2. The wire should be coated with preservative oil NG-203A for OST 38.01436−87 or K-17 GOST 10877−76, or other equivalent properties of oils. Customer’s request wire is not lubricated.

Rolls of barbed wire should be wrapped with packing paper GOST 8828−89 or paraffined paper GOST 9569−79, and then placed in metal cans or drums of normative-technical documentation.

By agreement with the consumer when shipping wire containers and odnorodnym consumers, it is allowed to pack the wire into the paper.

(Changed edition, Rev. N 1, 2).

4.3. Weight of cargo must not exceed 300 kg. the Formation of packages in overpacks carried out according to GOST 24597−81 and in accordance with the rules of transportation of goods.

(Added, Rev. N 2).

4.3. Each ball shall be securely attached label stating:

a) the trademark or name and trademark of manufacturer;

b) legend wire;

C) the batch number.

4.4. When packing wire in rigid packagings for each packing location must be specified:

a) trademark or the name and trademark of manufacturer;

b) designation of wire;

in) net weight;

g) the number of skeins.

4.3, 4.4. (Changed edition, Rev. N 2).

4.5. (Deleted, Rev. N 1).

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

Stowage and securing of cargo in vehicles for transportation by rail must comply with the technical conditions 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 15102−75, 20435−75 GOST, GOST 22225−76.

Transportation of the wire rail made in small or carload shipments.

(Changed edition, Rev. N 2).

4.7. Transport marking — according to GOST 14192−96.

4.8. Storage of wire shall be conducted in accordance with GOST 15150−69 for storage terms 5.

4.6−4.8. (Added, Rev. N 1).

4.9. Packing, marking, transportation and storage of wire that is sent to the far North or the districts equated to them, should correspond to GOST 15846−79.

(Added, Rev. N 2).

APP (mandatory). METHOD OF PERFORMING CONTROL OF SURFACE ROUGHNESS OF THE STEEL WIRE STRING

APP
Mandatory

Method sets the execution order of the roughness of the steel piano wire.

1. METHOD SAMPLE SELECTION AND PREPARATION

For roughness control are selected samples with a length of 50 to 70 mm. Specimens should be straightforward. The sample surface needs to be cleaned. Surface cleaning is carried out:

degreasing in hot trichlorethane at a temperature of 60−70 °C for 3−5 min;

degreasing cotton swab dipped in methyl alcohol;

washing in hot running water for 1−2 min.

2. CONTROL

2.1. Measurement of roughness of the wire surface is carried out in the longitudinal direction (see drawing).

Drawing

2.2. Controlled the wire specimen is fixed in the fixture so that the surface to be measured was parallel to the plane of measurement and the sensor.

2.3. After mounting the sample hold five times the dimension of the roughness parameter .

3. PROCESSING OF INSPECTION RESULTS

3.1. The results of the values of the roughness parameter of the controlled samples in the magazine and make a document about the quality with the number selected for control coils.

3.2. For the measurement of the roughness parameter taking the arithmetic average of results of five measurements.

(Changed edition, Rev. N 2).



The electronic text of the document
prepared by JSC «Code» and checked by:

the official publication of the
Wire metal. Part 2: Sat. Standards. -

M.: IPK Publishing house of standards, 2003