GOST 3282-74 Text

GOST text

Date of introduction from 01.07.75

This standard applies to round low carbon steel wire intended for the manufacture of nails , tying, fencing and other purposes.

(Revised edition, Rev. No. 5).

1. TYPES AND BASIC DIMENSIONS

1.1. The wire is made:

by type of processing:

thermally processed - O;

thermally untreated;

surface type:

without cover;

coated.

Heat-treated uncoated wire is made light ©, and by agreement between the consumer and the manufacturer, it is allowed to manufacture black (Ch) wire.

Coated wire is divided into:

galvanized 1st class - 1C,

galvanized 2nd class - 2C;

manufacturing accuracy:

elevated - P,

normal;

by tensile strength (only for unheated wire):

I group - I,

Group II - II.

(Revised edition, Rev. No. 5).

1.2. The wire is made with a diameter:

from 0.16 to 10.00 mm - uncoated;

from 0.20 to 6.00 mm - coated.

The diameter of the wire and the maximum deviations along it must correspond to those indicated in table. 1. Table 1mm

Note. It is allowed to manufacture wire with bilateral limit deviations. After admission, it must correspond to that indicated in Table. one.

(Revised edition, Rev. No. 5).

1.3. The ovality of the wire should not exceed half of the maximum deviations in diameter.

1.4. (Deleted, Rev. No. 5). Legend Examples

Wire with a diameter of 1.2 mm, heat-treated, high precision, light: Wire 1.2-P-O-S GOST 3282-74

The same, 1.0 mm in diameter, heat-treated, normal accuracy, black: Wire 1.0-O-Ch GOST 3282-74

The same, with a diameter of 1.2 mm, thermally untreated, 2nd class, increased accuracy, group II: Wire 1.2-P-2Ts-II GOST 3282–74.

(Revised edition, Rev. No. 5).

2. TECHNICAL REQUIREMENTS

2.1. The wire must be manufactured in accordance with the requirements of this standard according to the technological regulations approved in the prescribed manner, from wire rod of class II according to OST-14-15-193-86 or other regulatory and technical documentation. It is allowed to manufacture wire from low-carbon steel grades in accordance with GOST 1050-74 * and wire rod in accordance with GOST 4231-70.

_______

* From 01.01.91 GOST 1050–88 is put into effect.

(Changed edition, Rev. No. 3, 5).

2.2. The mechanical properties of the wire must correspond to those indicated in Table. 2. At the request of the consumer, heat-treated wire is produced with a regulated relative elongation.

table 2

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2.3. Thermally untreated wire with a diameter of 0.50 - 6.00 mm must withstand at least four kinks without destruction.

(Changed edition, Rev. No. 1).

2.4. The surface of the uncoated wire should not have cracks, captivity, sunsets and scale (with the exception of heat-treated black wire).

On the surface of the wire, local ripples, dents, risks, scratches are allowed, the depth of which should not be more than a quarter of the maximum deviation of the wire from normal accuracy.

(Revised edition, Rev. No. 5).

2.5. On the surface of the galvanized wire there should be no places not covered with zinc, black spots. Separate zinc deposits are allowed, the value of which should not be more than half of the maximum deviation from the actual wire diameter.

Non-uniformity of the wire in color, white spots and glosses, white coating is allowed, if the wire passes the test for the quality of the coating in accordance with the requirements of p.p. 2.6, 2.7.

(Changed edition, Rev. No. 1, 5).

2.6. The zinc coating must be durable and must not crack or flake off when the wire is spirally wound onto a cylindrical core with a diameter equal to that indicated in Table. 2a.

Table 2a

Surface dust-like peeling of the zinc coating on coiled samples of galvanized wire is allowed.

(Revised edition, Rev. No. 5).

2.7. The surface density of zinc, the number of immersions and the duration of each immersion must comply with the requirements of Table. 3.

(Changed edition, Rev. No. 1, 5).

2.8. Wire should be made in coils or spools. The winding of the wire must be carried out in regular rows without entanglement of the turns and ensure the free winding of the wire from coils and coils.

The coil of wire should consist of one piece of wire. No more than three pieces of wire are allowed on coils.

(Changed edition, Rev. No. 3, 5).

2.9. The minimum mass of a coil or piece of wire on a coil must correspond to that indicated in Table. 4.

Table 4

Note . Uncoated wire coils are allowed, weighing 50% less than that indicated in Table. 4 in the amount of not more than 10% of the mass of wire coils in the batch.

Coils of wire weighing 500 - 1500 kg are allowed. Each coil should consist of one piece of wire.

(Changed edition, Rev. No. 3, 5).

3. ACCEPTANCE RULES

3.1. The wire is accepted in batches. The batch must consist of wire of the same diameter, the same manufacturing accuracy, one type of processing, one type of surface, one class and one group, and must be issued with a quality document containing:

trademark or name and trademark of the manufacturer;

wire symbol;

test results;

lot net weight.

(Revised edition, Rev. No. 5).

3.2. Surface quality checks are carried out on each skein or spool. Dimensional checks are carried out on 5% of the skeins or spools of the lot, but not less than three skeins or spools.

3.3. To check the mechanical properties of the wire and the quality of the coating, 3% of coils or coils are selected from the batch, but not less than two coils or three coils.

3.4. Upon receipt of unsatisfactory test results for at least one of the indicators, it is repeated tests on a double sample.

The retest results apply to the entire lot.

3.2 - 3.4 . (Revised edition, Rev. No. 3).

4. TEST METHODS

4.1a. For each type of test, one sample is taken from each selected coil or spool of wire.

(Introduced additionally, Rev. No. 4).)

4.1. External inspection of the wire is carried out visually.

In case of disagreement in the assessment of quality, a defect on the surface of the wire is removed by stripping and its depth is determined by a comparative measurement of the diameter in protected and unprotected places. It is allowed to determine the depth of defects using a microscope of any type.

(Changed edition, Rev. No. 2, 5).

4.2. The diameter and ovality of the wire are measured in two mutually perpendicular directions of the same section at least in three places of each coil or coil with a micrometer according to GOST 6507–78.

The diameter of the galvanized wire is measured on a section of wire with a smooth surface without sagging.

(Revised edition, Rev. No. 5).

4.3. Tensile and rupture testing of the wire with a knot is carried out according to GOST 10446–80.

4.4. The bend test of the wire is carried out according to GOST 1579–80. The kink test for wires with a diameter of less than 0.50 mm is replaced by a tensile test with a knot. In this case, the breaking force should not be less than 50% of the breaking force of the same wire when tested without a knot.

4.5. The wire test for winding is carried out according to GOST 10447–80.

4.6. The surface density of zinc wire is determined by the gravimetric or volumetric-gasometric method, and the uniformity and continuity of the zinc coating is determined by the immersion method.

The weighting method is used for particularly precise determinations and arbitration analyses.

The length of the wire samples used to determine the mass of the zinc coating by weight or volumetric-gasometric method is indicated in Table. five.

Table 5