GOST 1071-81

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  ГОСТ 1071-81

GOST 1071−81 spring steel Wire heat-treated. Specifications (with Amendments No. 1, 2, 3, 4, as amended)

GOST 1071−81
Group V72

INTERSTATE STANDARD
SPRING STEEL WIRE
HEAT TREATED
Specifications
Heat-treated steel spring wire.
Specifications

ISS 77.140.65
OKP 12 2100

Date of introduction 1983−01−01

INFORMATION DATA

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

2. APPROVED AND put INTO force by the Decision of Gosstandart of the USSR from 02.07.81 N 2779

Change No. 4 adopted by the Interstate Council for standardization, Metrology and certification (minutes N 19 dated 24.05.2001)

The adoption of the changes voted:

3. REPLACE GOST 1071−67

4. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS

5. The expiration time limit is removed by the Resolution of Gosstandart No. 355 from 02.04.92

6. EDITION with Amendments No. 1, 2, 3, 4, approved in April 1987, March 1990, April 1992, June 2001 (IUS 7−87, 6−90, 7−92, 10−2001)


AMENDED, published in IMS No. 5, 2011

An amendment made by the manufacturer of the database

This standard applies to the spring steel wire of round section hardened and tempered carbon and alloy steel, intended for the manufacture of springs.

(Changed edition, Rev. N 1, 2).

1. THE TYPES, BASIC PARAMETERS AND DIMENSIONS

1.1 the Wire is divided

mechanical properties:

brands a And B

classes 1, 2:

wire of the 1st class shall be manufactured from steel grades 51HFA and 70HGFA;

the wire of the 2nd class shall be made of steel grades 65GA, 68GA, 68A, 51HFA, 70HGFA;

for precision manufacturing:

normal

high — P.

Requirements for wire for valve springs and wire springs for other purposes, 1st class, high precision belong to the highest category of quality.

Wire with advanced surface treatment — D.

(Changed edition, Rev. N 1, 2, 3).

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

Table 1

mm

Note. Customer’s request wire manufacture intermediate diameters with maximum deviations set out for the nearest larger diameter.

1.3. Wire for valve spring must be manufactured of high accuracy.

1.2, 1.3. (Changed edition, Rev. N 1).

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

Examples of symbols

Wire of steel grade 51HFA, valve springs, pre-treatment with the surface, the 1st class, grade A, high accuracy, with a diameter of 3.00 mm:

Wire 51HFA-K-1A-P-D-3 GOST 1071−81

Wire of steel grade 68GA for springs for other purposes, 2nd class, grade B, normal precision, with a diameter of 2.75:

Wire 68GA-2B-2.75 GOST 1071−81

(Changed edition, Rev. N 3, 4).

2. TECHNICAL REQUIREMENTS

2.1. Spring steel annealed wire shall be manufactured in accordance with the requirements of this standard for technological regulations approved in the prescribed manner.

2.2. Spring steel annealed wire shall be manufactured from steel grades 65GA, 68GA, 68A, 70HGFA with the chemical composition given in table.2, and steel grades 51HFA with the chemical composition according to GOST 14959. On demand wire shall be manufactured of steel grade specified by the consumer.

Table 2

Note. The wire can be deviations from the chemical composition not exceeding the carbon +0.01 percent, manganese ±0,02% silicon, up +0.02%, chromium to steel grade 70HGFA±0,02%.


By agreement between the consumer and the manufacturer is allowed to produce wire from steel electroslag remelting.

2.3. On the surface of wire should be free of cracks, flaws, smoothed out bubbles, sunsets, shells, rabini and rust.

On the surface of the wire for valve springs allowed the oxide film and the individual risks of the drawing, the depth of which shall not be more than 0.01 mm.

On the surface of wire for springs for other purposes permitted oxide film and a separate drawing risks, the depth of which shall not be more than 0.01 mm for wire diameter up to 2.00 mm and 0.02 mm — for wire diameter of 2.0 mm or more.

2.4. Customer’s request wire for valve springs are manufactured with advanced grinding, roughing, or grinding surfaces on the intermediate wire rod or billet.

Wire for the manufacture of springs for other purposes is manufactured with advanced grinding, roughing, or grinding surfaces on the intermediate wire rod or billet, in agreement with the consumer.

Allowed other types of preliminary surface treatment subject to the fulfilment of the requirements for the permissible depth of the drawing risok and besplatnosti.

2.2−2.4. (Changed edition, Rev. N 1).

2.5. Mechanical properties of the wire shall be as given in table.3.

Table 3

Mechanical properties for wire of intermediate diameter to match the standards set out for the nearest larger diameter.

Wire for valve spring shall be manufactured of grade A.

(Changed edition, Rev. N 3, 4).

2.6. The run strength on a reel for wire brand But should not exceed 74 N/mm(7,5 kgf/mm).

(Changed edition, Rev. N 1, 3).

2.7. Wire with a diameter of less than 4.00 mm and not have to break down and delaminate during winding, at least eight turns around a cylindrical core with a diameter equal to the diameter of the test wire.

2.8. The microstructure of wire must consist of sorbitol or Trustservice vacation. The presence in the structure of the needle orientation more than the 5th score for steels 65GA, 68GA, 68A and over the 2nd point to become 51HFA and 70HGFA according to GOST 8233, as well as areas of structurally free ferrite not allowed.

2.9. The complete decarburization of the wire is not allowed. Depth of partial decarburization shall be no more:

0.5% — for the valve spring;

1,0% — for springs for other purposes.

2.10. Wire is manufactured in coils with an internal diameter of not less than 400 mm. Coil shall consist of one segment, welding wire at finished size are not allowed. The winding of the wire shall be carried out without entanglement of the coils and to permit free spooling of the wire.

The mass of the coil wire is specified in table.4. Customer’s request coil’s weight should not exceed 80 kg.

Table 4

Allowed bags weighing 50% less than that specified in table.4 not more than 10% of the total mass of the wire in the party.

2.7−2.10. (Changed edition, Rev. N 1).

2.11. The waviness of the wire is not allowed.

(Added, Rev. N 1).

3. ACCEPTANCE RULES

3.1. Wire take parties. The party should consist of wire, one assignment, one class, one mark, one precision and one diameter and issued a document about quality that contains:

— trademark or name of the manufacturer;

— designation of wire;

— number of coils;

the weight of the party;

— the batch number;

— steel grade (according to customer’s demands).

(Changed edition, Rev. N 1, 2, 3).

3.2. Surface quality and diameter of the wire is checked for each reel.

3.3. To test a temporary resistance, kinks, twisting, nabivanija from party wire selected 10% of the coils, but not less than five skeins and 2% skeins, but at least two of the skeins to check the microstructure and decarburization.

3.4. The chemical composition of the steel wire certified by a quality document manufacturer of steel, and at the request of the consumer to check one skein is taken from the party.

3.5. If unsatisfactory test results of at least one of the indicators it is carried out re-testing at twice the sample.

The results of repeated tests apply to the entire party.

4. TEST METHODS

4.1. To check strength, bends, twists, microstructure, and decarburization shall be selected one sample from each end of the strand, to check for winding — up one sample from either end of the strand, for checking of chemical composition — one sample from either end of the strand.

4.2. Diameter and ovality of wire measured with a micrometer according to GOST 6507 in two mutually perpendicular directions of the same cross-section in at least three areas of a coil.

4.3. Chemical composition of wire check 28473 GOST, GOST 12344 — 12348 GOST, GOST 12350 — 12352 GOST, GOST 12355, 12357 GOST, GOST 22536.0 to GOST 22536.10 or other methods providing the required accuracy.

4.4. The surface quality of the wire is checked with the naked eye, and if necessary with the use of a magnifying glass of 10magnification.

The depth of the defect is determined by the destruction of its sweep, followed by a comparative measurement in the stripped and unstripped areas.

If you cannot determine defect depth sweep depth and nature of the defect is determined by microsclerotia.

(Changed edition, Rev. N 1).

4.5. Test wire tensile is carried out according to GOST 10446.

4.6. Test the wire on the bend is carried out according to GOST 1579.

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

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

4.9. The microstructure of the wire is checked on etched microsections on the scale 3 GOST 8233.

(Changed edition, Rev. N 3).

4.10. Determination of the depth bezoperatsionnogo layer is carried out by the method of M GOST 1763.

4.11. Waviness wire test according to standards agreed upon between manufacturer and user, in the case of disagreements in the assessment of the quality of the wire surface.

(Added, Rev. N 1).

5. PACKING, MARKING, TRANSPORTATION AND STORAGE

5.1. Each coil of wire shall be tied with soft wire of no less than three places, evenly spaced around the circumference. The ends of the rolls should be neatly arranged and easy to find.

5.2. The wire should be coated with a thin layer conservation and oil type NG 203A on the other 38−1011331, K-17 GOST 10877, GSD TU 38 USSR 20121 or industrial oil И12А, И20А.

Allowed the use of other lubricants that protect the wire from corrosion.

(Changed edition, Rev. N 4).

5.3. Rolls of barbed wire should be wrapped in one layer of waxed paper 9569 churchyard, then at least one layer of a polymeric film according to GOST 10354, GOST 16272или other normative technical documentation or container bonded fabrics churchyard of 14,253 or other normative and technical documentation, packaging or fabric for technical purposes according to GOST 5530, or other material, precluding the use of fabrics from natural fibers and not impair the quality of package made according to normative-technical documentation, as well as stitched flap from the waste of the textile industry.

Allowed the use of double-layer wrapping paper according to GOST 8828 or other paper produced according to normative-technical documentation and providing protection from corrosion.

Mechanized method of packaging coils of wire must be wrapped no less than one layer of cable crepe paper according to GOST 10396 or paper stamps 170 CMS, or other creped paper, equal in protective qualities, is made according to normative-technical documentation, or a polymer film according to GOST 10354 or GOST 16272, or another polymer film, made according to normative-technical documentation.

Packed skeins must be tied with soft round wire with a pitch of 100−150 mm strapping or some other method to protect the package from unrolling.

5.2, 5.3. (Changed edition, Rev. N 3).

5.4. To each of the coils of wire must be attached to the label, which indicate:

— trademark or name of the manufacturer;

— designation of wire;

— the batch number;

— steel grade (according to customer’s demands).

(Changed edition, Rev. N 1, 2).

5.5. Wire is transported by all kinds of transport in covered vehicles in accordance with cargo carriage regulations applicable to transport of this species.

Transportation of the wire rail is carriages, light-duty or small shipments. Stowage and securing of cargo must comply with the 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, 20435 GOST, GOST 22225.

Formation of the transport packages according to GOST 26663. Allowed the formation of packages without the use of pallets.

Conditions of transportation of wire must conform to the storage conditions 5ГОСТ 15150.

(Changed edition, Rev. N 1, 3).

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

(Changed edition, Rev. N 1).

5.7. Transport marking under GOST 14192.

5.8. Wire wrapping, sent to the far North and remote areas — according to GOST 15846.

5.7, 5.8. (Added, Rev. N 1).

6. MANUFACTURER’S WARRANTY

6.1. The manufacturer guarantees compliance wire requirements of this standard, under the conditions of storage and transportation. Warranty period of storage 6 months from the date of shipment.

(Changed edition, Rev. N 1).


The electronic text of the document
prepared by JSC «Code» and checked by:
the official publication of the
Wire metal.
Part 3: Sat. Standards. -
M.: IPK Publishing house of standards, 2003

Revision of the document including
changes and amendments prepared

JSC «Kodeks»