9389-75

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  ГОСТ 9389-75

9389−75 Wire, steel, carbon steel spring. Technical specifications (with Changes 1−5 N)

9389−75

Group V72

STATE STANDARD OF THE USSR
CARBON STEEL WIRE
SPRING
Specifications
Carbon steel spring wire. Specifications

ISS 77.140.65
OKP 12 2100

Date of introduction 1977−01−01

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 of Ministerial Council of the USSR from 17.07.75 N 1830

Change No. 5 adopted by the Interstate Council for standardization, Metrology and certification (Protocol No. 20 dated 01.11.2001)

The adoption voted:

3. REPLACE GOST 9389−60

4. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS

5. Limitation of actions taken by Protocol No. 2−92 of the Interstate Council for standardization, Metrology and certification (ICS 2−93)

6. EDITION Changes N 1, 2, 3, 4, 5, approved in February 1983, December 1984, December 1987, January 1990-March 2002 (IUS 5−83, 3−85, 3−88, 4−90, 6−2002)

Amended, published in the IUS N 7 2003, IUS N 6 2007

The amendments made by the manufacturer of the database

This standard applies to carbon steel drawn wire used for the manufacture of springs are wound in the cold state and not subjected to hardening.

(Changed edition, Rev. N 3).

1. TYPES AND BASIC DIMENSIONS

1.1. The wire is made:

a) mechanical characteristics:

grades A, B, C;

classes 1, 2, 2A, 3.

Recommendations for the use of spring wire depending on the grades and classes are given in Appendix 3.

b) for precision manufacturing:

normal accuracy;

high accuracy — P.

Wire class 1, 2, 3 is produced by normal and high precision, class 2A — high accuracy.

(Changed edition, Rev. N 3, 4).

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

Table 1

(Changed edition, Rev. N 3, 4).

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

Examples of symbols:

Wire grade A, class 1, high accuracy, with a diameter of 1.20 mm

Wire A-1-P-1,2 9389−75

The same, grade B, class 3, normal accuracy, with a diameter of 2.0 mm:

Wire B-3−2 9389−75

The same, grade B, class 2, high accuracy, with a diameter of 1.20 mm

Wire B-2A-1,2 9389−75

(Changed edition, Rev. N 3, 4).

2. TECHNICAL REQUIREMENTS

2.1. Carbon steel spring wire must be manufactured in accordance with the requirements of this standard for technological regulations approved in the prescribed manner, made of carbon steel according to GOST 1050, GOST 14959, GOST 1435 or normative and technical documentation, as well as steel grades KT-2 and 3K-7, the chemical composition indicated in table.2, and other special steel smelting, manufactured according to normative-technical documentation. The wire class 2A should be made of steel with a mass fraction of sulfur not more than 0,030% and phosphorus not more than 0,035%.

Table 2

Customer’s request wire is made from a specific grade of steel.

(Changed edition, Rev. N 2, 3).

2.2. On the surface of wire should be free of cracks, shells, sunsets, wooloowin, sinks and rust.

Allowed risks to a depth of no more than half of the tolerance field diameter, and the remains of technological coatings deposited on the surface of the wire to prepare the metal to the drawing.

Wire of class 2A for the aviation industry should be no traces of process copper plating surface.

(Changed edition, Rev. N 3).

2.3. Mechanical properties the wire shall conform to the standards specified in table.3.

Table 3

Notes:

1. The value of the run-up to the temporary tear resistance in rolls (coils) weighing up to 250 kg of A and B grades of classes 1, 2, 2A must be not more than 100 N/mm(10 kgf/mm); grade B, class 3, and grades In all classes for wire diameter of 1.6 mm and less than 200 N/mm(20 kgf/mm), and for wire diameter 1.6 mm — 150 N/mm(15 kgf/mm). The value of the run-up to the temporary tear resistance of wire in rolls (coils) weighing more than 250 kg shall conform to the values table.3.

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. In this case a larger value should not exceed the upper boundary of the normalized temporary tear resistance to this class, which includes a coil, more than 50 (5) N/mm(kgf/mm). This note is ignored if the wire refers to stamps A and B class 2A all diameters and class 2 diameter of 2.5 mm or more.

3. On demand the furniture industry wire diameter of 2.2 mm, high accuracy, grade B, is made with a tensile 1570−1770 N/mm(160−180 kgs/mm).

Mechanical properties of the wire intermediate diameters shall conform to the standards established for the nearest larger diameter (see table.3).

(Changed edition, Rev. N 3, 4, 5).

2.4. The complete decarburization of the wire is not allowed.

Depth of partial decarburization shall not exceed the wire grade And class 1 and grade B, class 1, 2A — 1.5% of the nominal diameter, grade B, class 2 — 2.5%, grade B class 3 — 3%.

2.5. Customer’s request wire brands A and B must not break or crack when the winding or bending. The wire diameter up to 3.0 mm should be wrapped around a cylindrical core that is equal to the wire diameter, and a diameter of 3.0 mm shall be subjected either to bending by 180°, or winding.

The diameter of the cylindrical core should be equal to two diameters of wire for wire from 3.0 to 6.0 mm and three diameters of wire to wire more than 6.0 mm. allowed the cylindrical core of smaller diameter.

The number of turns in the winding must be at least eight.

2.4, 2.5. (Changed edition, Rev. N 3, 4).

2.5. Customer’s request wire A and B grades should not delaminate when tested in torsion.

Under bundle refers to a crack running along a helix on the surface of the sample.

The main kink should be flat and perpendicular to the axis of the wire.

2.5 b. The waviness of the wire is not allowed.

Under the waviness refers to periodic variation in the diameter or periodic bending of the wire, persisting when applied to a sample of wire working length 200±0.5 mm load not greater than 0.3 breaking strength of the wire.

2.5 a, 2.5 b. (Added, Rev. N 3).

2.6. Wire shall be manufactured in coils or on reels.

The winding of the wire shall be carried out without entanglement of the coils and to permit free spooling of wire from the coils and coils. During the liberation from the bindings of a coil wire should not be folding in the «eight».

A coil consists of a single segment wire.

On reel or on a reel weighing more than 250 kg are allowed no more than three pieces of wire. At the separating of the segments must be laid bookmarks. Allowed instead of separating display and attach on the cheek of the coil ends.

Tying ends of the wire are not allowed.

2.7. The mass of the segment of wire on a reel or coil shall be as defined in table.5.

Table 5*

_________________
* Table.4. (Deleted, Rev. N 3).


Allowed weight of the segments of wire on 50% less than that specified in table.5 not more than 10% of the total mass of the wire in the party.

Customer’s request coil weight (coil) should not exceed 1 T.

2.6, 2.7. (Changed edition, Rev. N 3).

3. ACCEPTANCE RULES

3.1. Wire take parties. The party should consist of coils or coils of wire of the same diameter to the same class and the same precision workmanship and must be issued a document about quality that contains:

trademark or the name and trademark of manufacturer;

symbol wire;

batch number;

the number of packages;

the net mass;

grade of steel;

the date of acceptance.

(Changed edition, Rev. N 2).

3.2. In size and appearance, is checked every skein or coil of the party.

3.3. To check mechanical properties and waviness if there is disagreement in the assessment of this indicator is taken 10% of the skeins or 20% of the coils, but not less than five skeins or coils, and to check for decarburization of 2% skeins or coils, but not less than three.

(Changed edition, Rev. N 3).

3.4. If unsatisfactory test results of at least one of the indicators, a second test on this indicator at twice the number of coils (coils), taken from those not passing the test. The results of repeated tests apply to the entire party.

If unsatisfactory results of the repeated tests in terms of «waviness» of wire — the manufacturer conducts continuous monitoring on this indicator.

(Changed edition, Rev. N 1, 3).

4. TEST METHODS

4.1. For each test taken on the same sample with the two ends of a coil for each type of test or one sample from each check the coil.

(Changed edition, Rev. N 1).

4.2. Diameter and ovality of wire measured with a micrometer according to GOST 6507 and GOST 4381в two mutually perpendicular directions of the same cross section of wire or other measuring tools that provide required accuracy of measurement.

(Changed edition, Rev. N 3).

4.3. Inspection of the wire surface is produced visually, and in controversial cases — with the use of a magnifying glass a fivefold increase. The depth of the defect in the wire shall be determined by removing it Stripping with the subsequent comparative measure of wire in the stripped and unstripped areas. If you cannot determine the depth of the defect Stripping determination of the depth and nature of the defect is performed by microsclerotia.

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

4.5. Test wire bending is carried out around a cylindrical core from the parallelism of the parties in accordance with the requirements of paragraph 2.5.

(Changed edition, Rev. N 4).

4.6. Torsion testing is carried out according to GOST 1545, the length of tested part of the specimen is set equal to 100(diameter of wire), but not less than 50 and not more than 500 mm.

Test proslaivaet when twisting is carried out before the complete destruction of the sample.

Examination of fractures is carried out with the naked eye. For wire diameter less than 0.8 mm allowed the use of a magnifying glass a fivefold increase.

Note. To 01.01.90 test wire to proslaivaet is in agreement with the consumer.


(Changed edition, Rev. N 3, 5).

4.7. Determination of depth of decarburization produced by the method M GOST 1763.

4.8. Test wire for the winding is carried out according to GOST 10447.

If there is disagreement in assessing the quality of the wire according to claim 2.5 is the test on the winding is carried out the bending test.

(Changed edition, Rev. N 3).

4.9. The lack of waviness is provided by the manufacturing technology.

If there is disagreement in the evaluation of waviness, it is determined on samples with a working length of (200±0.5) mm with a micrometer according to GOST 6507 with special heel (Annex 2) to 10 dimensions in two mutually perpendicular directions on the sample length.

Samples must be secured in the clamps of the testing machine according to GOST 28840 or other machine according to normative-technical documentation, allowing to apply the required load.

The wire is considered to be wavy, if the number of deviations from a constant diameter, measured in one of the planes is 3 or more dimensions.

The magnitude of the residuals must be greater than the error of measuring tools.

(Changed edition, Rev. N 5).

4.10. Allowed for the determination of mechanical properties the application of statistical methods and nondestructive testing by methods, approved in the prescribed manner.

4.9, 4.10. (Added, Rev. N 3).

5. PACKING, MARKING, TRANSPORTATION AND STORAGE

5.1. Each coil shall be securely tied with a soft wire according to normative-technical documentation in at least three places evenly spaced around the circumference.

Coils of wire with a diameter of 0.60 mm or less can be tied to the end of the wound wire or twine according to GOST 17308 or other regulatory-technical documentation.

Skeins of one class, group and diameter can be connected to the Bay.

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

(Changed edition, Rev. N 3, 5).

5.2. The wire should be covered with preservation oil (lubricants) type NG-or NG 203A-203B on the other 38−1011331−90 or K-17 GOST 10877.

Permitted to use other oils (grease), providing protection against corrosion. Wire coils can be supplied ungreased.

5.2. (Changed edition, Rev. N 3).

5.3. Coil with wire diameter less than 0.20 mm shall be wrapped with a layer of paper and stacked in wooden boxes according to GOST 18617 or other normative and technical documentation, or in metal containers, made according to normative-technical documentation, inside lined with waterproof paper.

Coils, coil wire diameter of 0.20 mm or more should be wrapped with a layer of paper, then a layer of a polymeric film or nonwoven materials, or woven fabrics of the chemical fibers. In mechanised packing of rolls of barbed wire should 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 a locking packaging wire according to GOST 3282, or another wire.

By agreement with the consumer allowed the wire does not pack and do not lubricate.

The quality of packaging materials used:

the waxed paper according to GOST 9569 (you may use a double layer of wrapping paper according to GOST 8828 or oiled wrapping paper according to GOST 8273 stamps, or other paper, providing 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.

Wire that is sent to the far North and remote areas, Packed in accordance with GOST 15846.

(Changed edition, Rev. N 1, 3).

5.3. Weight per package should be no more than 1500 kg.

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

(Added, Rev. N 3, 5).

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

trademark or the name and trademark of manufacturer;

symbol wire;

stamp of technical control;

batch number.

(Changed edition, Rev. N 1, 3).

5.5. (Deleted, Rev. N 2).

5.6. Wire transporterowych all kinds of transport in accordance with cargo carriage regulations applicable to transport of this species. Stowage and securing of cargo in vehicles must meet the specifications of loading and fastening of cargoes.

Transportation of the wire rail is held carload, small or low-tonnage shipments.

Allowed the transport of wire in universal containers according to GOST 15102,20435 GOST, GOST 22225.

The conditions of transport must comply with the storage conditions, 5 GOST 15150.

(Changed edition, Rev. N 3, 5).

5.7. Storage wire — on storage conditions 3 to GOST 15150.

(Changed edition, Rev. N 3).

5.8. Transport marking under GOST 14192.

(Added, Rev. N 3).

ANNEX 1 (reference). Theoretical weight of 1000 m of wire

ANNEX 1
Reference

ANNEX 2 (mandatory). Special heel to the micrometer type MK to determine the waviness of the wire

ANNEX 2
Mandatory

Material — steel SH-15, U10A, U12A. Hardness — HRC 48 to 50.

APPENDIX 3 (reference). Recommendations for use: spring wire

APPENDIX 3
Reference

A relative measure of run strength is calculated by the formula

where to run a temporary resistance to the rupture in the party, N/mm;

 — the minimum value of the temporary rupture strength class, N/mm.

APP 2, 3. (Added, Rev. N 3).

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