GOST 7480-73

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  ГОСТ 7480-73

GOST 7480−73 printing Wire. Specifications (with Amendments No. 1, 2, 3)

GOST 7480−73
Group B7

INTERSTATE STANDARD
PRINTING WIRE
Specifications

Polygraphic wire. Specifications

ISS 77.140.65
OKP 12 2100

Date of introduction 1975−01−01

INTRODUCED by decree of the State Committee of standards of the Council of Ministers of the USSR dated September 25, 1973 N 2199

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

REPLACE GOST 7480−55

EDITION with Amendments No. 1, 2, 3, approved in September 1981, April 1984-December 1988 (IUS 11−81, 8−84, 3−89).


This standard applies to round steel wire for staple printing, stationery and cardboard products.

(Changed edition, Rev. N 3).

1. BASIC PARAMETERS AND DIMENSIONS

1.1. Printing wire is produced of two types:

without coating;

galvanized — C.

(Changed edition, Rev. N 2).

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

Table 1

mm

(Changed edition, Rev. N 2, 3).

1.3. Ovality of the wire in the section (the difference between the largest and smallest diameters of the same section) must not exceed:

wire without coating — 0.02 mm;

for galvanized wire — tolerance.

(Changed edition, Rev. N 3).

Examples of symbols

Wire uncoated diameter of 1.20 mm

Wire of 1.20 GOST 7480−73

Galvanized iron wire of diameter 0.60 mm:

Wire 0,60 — C GOST 7480−73

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, of low carbon wire rod for OST 14−15−193−86, GOST 1050−88 or another NTD.

2.2. Mechanical properties the wire shall conform to the standards specified in table.2.

Table 2

Note. Customer’s request wire diameter 0.50 mm and 0.60 mm made with the temporary resistance 780−980 N/mm(80 to 100 kgf/mm) and the number of bends not less than 12.

2.1, 2.2. (Changed edition, Rev. N 2, 3).

2.3. The surface of the wire must not have cracks, shells, sunsets and rust. The zinc coating on the wire must be continuous, without gaps or cracks visible without using the magnifying devices.

Allowed the heterogeneity of the surface of the galvanized wire by color, white spots and white patches in the form of adhering zinc oxide if the coating withstands the norms specified in tab.3.

Table 3

Note. Wire used for work on high-speed sewing machines, manufactured with the superficial density of zinc not less than 15 g/mwith a single dive duration of 30 s in a solution of copper sulphate.


Allowed local influxes of zinc that increases the actual diameter of the wire by an amount not exceeding the positive limit deviation.

(Changed edition, Rev. N 2).

2.4. Adhesion of zinc coating to the steel core must be strong. The coating should not crack and flake off when the spiral wrapping of the wire six tight coils on a cylindrical mandrel with a diameter equal to four times the diameter of the wound wire.

Allowed surface powdery peeling of the zinc coating on the wound samples of galvanized wire.

2.5. Surface density of zinc, the number and duration of immersion of the wire in a solution of sulphate of copper must conform to the standards specified in table.3.

2.4, 2.5. (Changed edition, Rev. N 2, 3).

2.6. Wire is manufactured in coils consisting of one segment. The wire should be wound tight separatornyi rows and free to Mosey skeins. When releasing the skeins from the bindings wire not be withdrawn in «eight».

2.7. Weight of wire on a reel shall be as defined in table.4.

Table 4

Note. The number of coils of wire of low masses in the party must not exceed 15% of the total number of skeins.

3. ACCEPTANCE RULES

3.1. Wire take parties. The party should consist of wire of the same diameter, one surface and one steel grade and be accompanied by a document about quality that contains:

trademark or the name and trademark of manufacturer;

symbol wire;

the results of the tests;

the weight of the party;

batch number.

(Changed edition, Rev. N 2, 3).

3.2. Visual inspection, measurements of the diameter and the test mass is exposed to 10% of the coils of wire in the party, but not less than five skeins.

3.3. To check mechanical properties, surface density of zinc, the number of dives and the adhesion of the zinc coating to the steel core wire of the party take 3% of the skeins, but not less than two skeins.

(Changed edition, Rev. N 2).

3.4. If unsatisfactory test results of at least one of the indicators it is carried out re-tests on twice the number of skeins.

The results of repeated tests apply to the entire party.

(Changed edition, Rev. N 2, 3).

4. TEST METHODS

4.1. Visual inspection of wire is carried out visually.

4.1. To determine the mechanical properties of the wire, the surface density of zinc on the wire, number of dives, the adhesion of the zinc coating to the steel core select one sample from each selected roll.

(Added, Rev. N 2).

4.2. Diameter and ovality of wire measured with a micrometer according to GOST 6507−90 in two mutually perpendicular directions of the same cross-section in at least three different areas of a coil. The final result should be the arithmetic mean results of three measurements.

(Changed edition, Rev. N 3).

4.3. Test wire tensile and the rupture with the node is carried out according to GOST 10446−80.

4.4. Test the wire on the bend is carried out according to GOST 1579−93.

4.5. Strength of adhesion of the zinc coating to the steel core is tested in accordance with the requirements of section 2.4 of this standard and GOST 10447−93.

4.6. The amount of zinc on the surface of galvanized wire determine the volume-gasometrical or by the gravimetric method, and the continuity and uniformity of zinc coating by immersion.

The weight method is used for particularly precise definition in the case of disagreements in the assessment of the quality of the wire.

Length of the wire samples to determine the mass of zinc coating three-gasometrical or the gravimetric method should be not less than 300 mm.

Samples of the wire can be cut into any number of segments depending on the test conditions.

4.6.1. Space-gasometrical method

Removing zinc coating produced in a device consisting of a reservoir and connected to it with a rubber hose, a glass burette with two taps, under total immersion of samples of wire in the solution is (18±2) °C until cessation of gas evolution.

The test is carried out in the following order:

a) take samples and measure set for test length in accordance with the requirements of section 4.6;

b) degreased wire samples in alcohol, benzene, or gasoline and wipe with a clean cloth;

C) dissolve the zinc coating, completely catching the evolved hydrogen;

g) measure the volume of evolved hydrogen gas and lead to normal conditions (pressure of 760 mm Hg.St., temperature 0 °C);

d) calculate the average mass of zinc coating (a) in grams per 1 mof the surface of the wire by the formula

,

where is the volume of hydrogen under normal conditions, cm;

 — the nominal diameter of the wire specimen, mm;

 — the length of the wire specimen, mm.

Bleeding zinc is produced in an aqueous solution of the mixture of acids of the composition:

sulfuric according to GOST 4204−77 — 100 g/DM;

a salt according to GOST 3118−77 — 34 g/DM

or in the inhibited solution of sulfuric acid prepared in the following manner: 2 g of SbOor AsOdissolved in 60 cmof hydrochloric acid by the GOST 3118−77 with a density of 1.19 g/cmand topped up to 1 cmof sulfuric acid according to GOST 4204−77 concentration of 80 g/DM.

250 cmbleed solution is tested up to 60 samples galvanized wire, after which the solution was replaced.

The average weight of zinc coating is calculated with a precision of

0.1 g/m.

4.6.2. Weight method

The amount of zinc on the surface of the galvanized wire by the gravimetric method is determined by dissolving the coating from the samples of wire in solutions of acid compounds listed in claim 4.6.1.

The average weight of zinc coating weight method is determined in the following order:

a) take samples of galvanized wire, degreased in alcohol, gasoline or benzene and wipe with a clean cloth;

b) weigh the sample;

C) dissolve the zinc coating;

d) the samples are washed in distilled water, wiped with a clean cloth to remove moisture and weighed again;

d) measure the actual diameter of the specimen after etching zinc;

e) calculate the average mass of zinc coating (a) in grams per 1 mof the surface of the wire by the formula

,

where is the mass of the sample wire (Swatch group) before removing the coating, g;

the mass of the sample wire (Swatch group) after removing the coating, g;

 — diameter of the wire specimen after the etching of the coating, mm.

Value and is determined with a precision of 0.001 g, the size  — accurate to 0.01 mm, the average mass of zinc coating with an accuracy of 0.1 g/m

.

4.6.3. The immersion method

The continuity and uniformity of the zinc coating on the wire is controlled by immersion of the sample of galvanized wire in a solution of copper sulphate, prepared by dissolving one part by weight of dry crystal of copper sulphate according to GOST 4165−78 (h. e. a.) in five weight parts of distilled water and neutralized with an excess of freshly precipitated hydrate of copper oxide. After neutralization the solution should be filtered. The density of the filtered neutralized solution should be 1,114−1,116 g/cm.

The temperature of the solution of copper sulphate during the test must be (18±2) °C.

The test procedure shall be the following:

a) take samples of the wire length of 150 mm, degreased in alcohol, gasoline or benzene and wipe with a clean cloth. If the samples are degreased with gasoline or benzene, to produce additional rinsing them with distilled water and wipe to remove moisture;

b) immerse the samples in a solution of copper sulphate to a depth of not less than 100 mm.

The time of immersion are shown in table.3.

After each immersion in the solution samples immediately washed with distilled water and wipe with a clean cloth. The number of samples simultaneously immersed in the solution should not be more than six.

Samples of wire must be in the solution of copper sulphate in a stationary position, not in contact with each other and with the walls of the vessel. The same solution of copper sulphate with a volume of 200 cmcan be used for testing samples, the number of which depending on the wire diameter shown in table.5.

Table 5

If after a set number of dives in a solution of sulphate of copper on the surface of the wire specimen will be the areas covered with copper, which, when wiping the sample with a clean cloth or cotton wool, the sample is considered to be not stand the test. Inspection of samples produced visually.

On the surface of samples allowed:

a) redness in the areas located at a distance of 25 mm from the solution level and at a distance of 20 mm from the immersed in the solution the lower end of the sample;

b) brown color and the redness of point character, disappearing or no incremental in magnitude and brightness, with additional immersion in a solution of copper sulphate for 1−2 s.

5. PACKING, MARKING, TRANSPORTATION AND STORAGE

5.1. Each coil of wire shall be tied with annealed wire according to GOST 3282−74 or other heat-treated wire according to normative-technical documentation in at least three places evenly spaced around the circumference of the rolls. The ends of the rolls should be neatly arranged and easy to find.

Coils of wire of the same diameter and one type of surface can be tied in the Bay.

Wire without coatings shall be coated with a thin layer conservation and oil type НГ203 brands a And B on the EAST 38.01436−87, K-17 GOST 10877−76, GSD and GSD-1 according to TU 38. USSR 201215−80 or grades of industrial oil-12A,-20A,-30A,-40A, AND 50A according to GOST 20799−88 with the addition of additives KP according to GOST 23639−79 (15−20%) or AKOR-1 (15−25%) churchyard 15171−78.

By agreement with the consumer allowed wire without coating not lubricated.

Allowed to apply preservative oil of a different type, protecting the wire from corrosion.

(Changed edition, Rev. N 1, 2, 3).

5.2. Coils of wire with a diameter of 0.6 mm and less shall be wrapped with a layer of paper and Packed in tight wooden boxes of the type II-1 according to GOST 18617−83, GOST 16536−90 or other normative and technical documentation or other containers (metal, cardboard, plastic) is manufactured according to normative-technical documentation.

Coils of wire with a diameter of more than 0.6 mm should be wrapped with a layer of paper, then a layer of polymeric film or fabric.

In mechanised packing of rolls of barbed wire should be wrapped with a layer of paper churchyard 10396−84 or paper stamps KMV-170 according to normative-technical documentation, or other creped paper, equal in protective qualities, is made according to normative-technical documentation, or a polymer film.

The quality of packaging materials used:

the waxed paper according to GOST 9569−79; it allowed the use of double-layer wrapping paper GOST 8828−89, or other paper, protecting the wire from corrosion, is made according to normative-technical documentation;

the polymeric film according to GOST 10354−82, GOST 16272−79 and other normative and technical documentation;

container holstoproshivny the canvas according to normative-technical documentation;

fabric packaging technical assignment GOST 5530−81*, fabric of chemical fibers according to normative-technical documentation;
_______________
* On the territory of the Russian Federation GOST 5530−2004. — Note the CODE.

other types of packaging materials according to normative-technical documentation, precluding the use of fabrics made of natural fibers and does not deteriorate the quality of a stitched flap from the waste of the textile industry.

Wire that is sent to the far North and the districts equal to them, Packed in accordance with GOST 15846−79*.
________________
* On the territory of the Russian Federation GOST 15846−2002. — Note the CODE.

(Changed edition, Rev. N 1, 3).

5.3. Each ball or Bay shall be securely attached a label, which indicate:

a) trademark or the name and trademark of manufacturer;

b) designation of wire;

C) the mark of the technical control Department.

(Changed edition, Rev. N 1, 2, 3).

5.4. Weight of cargo must not exceed 80 kg, In agreement with the consumer allowed to increase the weight of the package. Gross mass of a wire in a metal container should be no more than 250−300 kg.

The package is formed into transport packets according to GOST 24597−81, GOST 21650−76 and goods transportation regulations approved by the relevant departments.

(Changed edition, Rev. N 1, 3).

5.5. Hard containers should be specified:

a) trademark or the name and trademark of manufacturer;

b) designation of wire;

in) net weight.

(Changed edition, Rev. N 1, 2, 3).

5.6. (Deleted, Rev. N 2).

5.7. 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 on vehicles transported by rail, must comply with the technical conditions of loading and fastening of cargoes, approved by the Ministry of Railways of the USSR. Transportation by rail is carriages, light-duty or small shipments.

It is allowed to transport wire in universal containers according to GOST 15102−75, 20435−75 GOST, GOST 22225−76.

5.8. Storage of wire — under the terms of 3 GOST 15150−69.

5.7, 5.8. (Changed edition, Rev. N 3).

5.9. Transport marking of packages, the place and method of application — according to GOST 14192−96.

(Added, Rev. N 2).