Galvanized steel wire GOST 1668 73. Galvanized steel wire for overhead
The KabelGrad company offers to buy wire that complies with GOST 1668-73, wholesale and retail in any quantity.
Galvanized steel wire according to GOST 1668-73 is a telegraph wire intended for laying overhead communication lines. This standard regulates the technical conditions for the manufacture of wire, defines its characteristics, and establishes requirements for manufacturing accuracy and permissible deviations.
Description of telegraph wire GOST 1668-73
Wire is produced from steel wire rod, depending on the brand of which, it is divided into ordinary and cuprous ( M). In copper wire contains 0.2 to 0.4% copper, V ordinary- copper less than 0.2%. GOST 1668-73 establishes nominal diameters wires: 1.50; 2.00; 2.50; 3.00; 4.00; 5.00; 6.00 mm.
Wire GOST 1668-73 is produced normal accuracy manufacturing and increased (P). For wire of normal manufacturing accuracy, the maximum permissible deviations are ±0.06 mm for diameters from 1.50 to 3.00 mm and ±0.08 mm- for diameters 4.00 to 6.00 mm. For wire with increased manufacturing precision:
- ±0.03 mm- for wire with nominal diameter 1.50 mm;
- ±0.04 mm- for wire diameter 2.00 and 2.50 mm;
- ±0.05 mm- for wire diameter 3.00 mm;
- ±0.06 mm- for wire diameter 4.00; 5.00 and 6.00 mm.
Based on the surface density of zinc, wire of the 1st and 2nd classes is distinguished. For wire 1st class The surface density of zinc, depending on the diameter of the wire, should be, according to the standard, from 70 to 110 g/m2, and for wire 2nd class - from 50 to 110 g/m2. Zinc coating on wire should not have cracks or gaps, which would be visible without the use of a magnifying device.
The most important characteristic of telegraph wire is its electrical resistivity, which according to GOST 1668-73 should not exceed at temperature +20°С:
- for ordinary wire- 0.138 Ohm m 2 /m;
- for cuprous- 0.146 Ohm m 2 /m.
You can get acquainted with the offered range of telegraph galvanized steel wire from the catalog on our company’s website, and place an order by calling one of the company’s telephone numbers.
page 1
page 2
page 3
page 4
page 5
page 6
page 7
page 8
page 9
page 10
INTERSTATE STANDARD
Date of introduction 01/01/75
This standard applies to steel wire intended for overhead communication lines.
1. MAIN PARAMETERS AND DIMENSIONS
1.1. The wire is produced depending on the brand of wire rod:
coppery - M,
ordinary;
by manufacturing accuracy:
normal accuracy,
increased accuracy - P;
depending on the surface density of zinc of two classes:
1st class - 1,
2nd class - 2.
1.2. The diameter of the wire and the maximum deviations along it must correspond to those indicated in the table. 1.
Table 1
1.3. The ovality of the wire (the difference between the largest and smallest diameters of one section) should not exceed the maximum deviations in diameter.
Examples of symbols
Linear wire with a diameter of 4.00 mm, ordinary, increased precision, class 1:
Linear wire with a diameter of 4.00 mm, copper, normal accuracy, class 2:
1.1 - 1.3 (Changed edition, Amendment No. 3).
2. TECHNICAL REQUIREMENTS
2.1. The wire must be manufactured in accordance with the requirements of this standard according to technological regulations approved in the prescribed manner, from wire rod in accordance with the regulatory document.
2.2. The mechanical properties of the wire must comply with the standards specified in table. 2.
table 2
Notes:
1. The manufacturer guarantees that the mechanical properties of wire with a diameter of 2.5 - 6.0 mm comply with the standards given in table. 2 of this standard, after 20 days from the date of manufacture.
2. In the first two days from the moment of heat treatment, the manufacturer is allowed to accept wire with a diameter of 2.5 - 6.0 mm with a temporary tensile strength of at least 330 MPa (34 kgf/mm 2).
2.3. The zinc coating on the wire must be continuous, without gaps or cracks visible without the use of magnifying devices.
Individual influxes of zinc cannot serve as a basis for rejection.
Minor risks, dents, individual roughness of the zinc coating, as well as non-uniformity of the wire surface in color, white spots, sparkles and white deposits in the form of adhered zinc oxide are allowed if the coating can withstand the number of immersions indicated in the table. 3.
Table 3
|
Nominal wire diameter, mm |
Surface density of zinc, g/m2 |
Number of dives lasting 60 s |
|
|
1st class |
2nd class |
||
2.4. The adhesion of the zinc coating to the steel base must be strong. The zinc coating should not crack or peel when the wire is spirally wound in eight tight turns onto a cylindrical rod with the diameter indicated in the table. 3a. Superficial dusty peeling of the zinc coating on wound samples of galvanized wire is not a rejection sign.
Table 3a
2.5. The surface density of zinc and the number of immersions for 60 s in a solution of copper sulfate must correspond to the standards specified in table. 3.
2.6. The electrical resistivity of the wire at a temperature of plus 20 °C should not exceed:
cuprous - 0.146 Ohm mm 2 /m;
ordinary - 0.138 Ohm mm 2 /m.
By agreement between the manufacturer and the consumer, the electrical resistivity of the wire should not exceed:
cuprous - 0.138 Ohm mm 2 /m;
ordinary - 0.130 Ohm mm 2 /m.
The standards for the highest permissible values of electrical resistance of 1 m of wire are given in Appendices 1, 2 and 3.
2.4 - 2.6. (Changed edition, Amendment No. 3).
2.7. The wire is produced in coils consisting of one piece. The wire should be wound in untangled rows and unwind freely from the skeins. When releasing the skeins from the bindings, the wire should not curl into a figure eight.
2.8. The weight of wire in the coil must correspond to that indicated in the table. 4.
Table 4
|
Wire diameter, mm |
Hank weight, kg, not less |
Wire diameter, mm |
Hank weight, kg, not less |
Estimated weight of 1000 m of wire, kg |
|
Note. Allowed coils of wire weighing 50% less than that indicated in the table. 4 in an amount of no more than 10% of the total mass of wire coils in the batch.
2.7, 2.8. (Changed edition, Amendment No. 2).
3. ACCEPTANCE RULES
3.1. Wire is accepted in batches. The batch must consist of wire of the same type and size and be documented in one quality document containing:
wire symbol;
net weight;
results of tests performed;
date of manufacture.
(Changed edition, Amendment No. 2).
3.2. For external inspection and measurement of wire, as well as to check the weight of the coils, 3% of the coils, but not less than three coils, are selected from each batch.
3.3. From the wire adopted in accordance with clause 3.2 of this standard, 3% of the coils, but not less than three coils, are selected to check its mechanical properties, the quality of the zinc coating and electrical resistance.
3.4. If unsatisfactory test results are obtained for at least one of the indicators, repeated tests are carried out on a double number of samples taken from the skeins that were not tested.
The results of repeated tests apply to the entire batch.
3.3, 3.4. (Changed edition, Amendment No. 2).
4. TEST METHODS
4.1a. To determine the mechanical properties of the wire, the adhesion of the zinc coating to the steel base, the surface density of zinc, the number of immersions, and electrical resistance, one sample is taken from each controlled coil.
4.1. External inspection of the wire is carried out visually.
4.2. The diameter of the wire is measured with a measuring instrument with scale divisions up to 0.01 mm in two mutually perpendicular directions of the same section in at least three places in the coil. To measure the diameter, select a section of wire with a smooth surface without zinc deposits.
4.3. Tensile testing of wire is carried out according to GOST 10446 on samples with a design length of at least 200 mm.
4.4. Wire bend testing is carried out according to GOST 1579.
At the consumer's request, the finished copper wire is checked for copper content in accordance with GOST 22536.8 and GOST 22536.0.
4.6. Testing the quality of zinc coating of wire by coiling is carried out according to GOST 10447.
4.7. The surface density of zinc is determined by gravimetric or volumetric gasometric methods.
The weight method is used for particularly precise determinations and in case of disagreement in assessing the quality of the wire.
The length of the wire sample to determine the surface density of zinc must correspond to the standards specified in table. 5.
Table 5
Samples may be cut into an arbitrary number of sections depending on the test conditions.
(Changed edition, Amendment No. 2).
4.7.1. Volumetric gasometric method
Removal of the zinc coating is carried out in a device consisting of a reservoir and a glass burette with two taps connected to it by a rubber hose, with the samples completely immersed in the solution at ambient temperature until gas evolution stops.
wire samples are taken and the length specified for testing is measured in accordance with the requirements of table. 5;
degrease wire samples in alcohol, benzene or gasoline and wipe with a clean cloth;
dissolve the zinc coating, completely capturing the hydrogen released;
measure the volume of hydrogen released and bring it to normal conditions (pressure 760 mm Hg, temperature 0 ° C), using tables of correction factors;
calculate the average surface density of zinc per 1 m2 of wire surface, ( M) in grams according to the formula
Where V 0 - volume of hydrogen under normal conditions, cm 3;
d - nominal diameter of the wire sample, mm;
l- sample length, mm.
Zinc is bled off in an aqueous solution of a mixture of acids:
or in a solution of inhibited sulfuric acid prepared as follows: 2 g of Sb 2 O 3 or As 2 O 3 are dissolved in 60 cm 3 of hydrochloric acid according to GOST 3118, density 1.19 g/cm 3 and added to 1 dm 3 of sulfuric acid according to GOST 4204, concentration 80 g/dm3.
The bleed solution is replaced as it becomes depleted.
(Changed edition, Amendment No. 2, 3).
4.7.2. Weight method
The surface density of zinc is determined by dissolving the coating from wire samples in a solution of inhibited sulfuric acid of the composition specified in clause 4.7.1.
The test is carried out in the following order:
samples of galvanized wire are degreased in alcohol, benzene or gasoline and wiped with a clean cloth;
weigh the samples;
dissolve the zinc coating;
wash the samples in distilled water;
wipe with a clean cloth until moisture is removed and weigh again;
measure the actual diameter of the sample after bleeding off the zinc;
calculate the average surface density of zinc per 1 m2 of wire surface ( M 1) in grams according to the formula
Where m - weight of a wire sample (group of samples) before removing the coating, g;
m 1 - mass of wire sample (group of samples) after removing the coating, g;
d - diameter of the wire sample after peeling off the coating, mm.
Quantities m And m 1 is calculated with an accuracy of 0.001 g, the value d- With accurate to 0.01 mm, the value of the average surface density of zinc - accurate to 0.1 g/m 2.
(Changed edition, Amendment No. 2).
4.8. The continuity and uniformity of the zinc coating is controlled by immersing a sample of galvanized wire in a solution of copper sulfate, prepared by dissolving one part by weight of dry crystalline copper sulfate according to GOST 4165 in five parts by weight of distilled water and neutralized with an excess of freshly precipitated copper oxide hydrate. After neutralization, the solution must be filtered. The density of the neutralized filtered solution should be 1.114 - 1.116 g/cm3.
The temperature of the copper sulfate solution during the test should be (18 ± 2) °C.
The test procedure is as follows:
samples of wire 150 mm long are taken and washed with alcohol, gasoline or benzene.
If the samples are washed with gasoline or benzene, then they are additionally washed with distilled water and wiped until moisture is removed;
immerse the samples in a solution of copper sulfate to a depth of at least 100 mm.
The samples must be immersed for exactly 1 min.
After each immersion in the solution, the samples are immediately rinsed with distilled water and wiped with a clean cloth. The number of samples simultaneously immersed in the solution should not exceed six.
The wire samples should be in a solution of copper sulfate in a stationary position, without contacting each other or the walls of the vessel.
The permissible number of samples for testing in the same solution of copper sulfate with a volume of 200 cm 3 must correspond to that indicated in the table. 6.
Table 6
If, after a specified number of immersions in the solution, there are areas on the surface of the wire sample covered with copper that does not come off when wiping the sample with cotton wool or a clean cloth, then the sample is considered to have failed the test. Samples are viewed with the naked eye.
The following are allowed on the surface of the samples:
heterogeneity in color and shine;
redness in an area located at a distance of 25 mm from the level of the solution and at a distance of 20 mm from the lower end of the sample immersed in the solution;
brown tint and point redness, disappearing or not increasing in size and intensity of color upon additional immersion of the sample in a solution of copper sulfate for 1 - 2 s.
4.9. Electrical resistance to direct current is determined using a double Thomson bridge with an accuracy of 0.00001 Ohm. At the same time, the temperature of the room in which the test is carried out is measured.
Recalculation of resistance R t of a 1 m long wire at a temperature t°C to the resistance of the same wire R 20 at a temperature of 20 °C is produced according to the formula
Electrical resistivity r 20 is calculated using the formula
r 20 = R 20 · F,
where is the cross-sectional area of the wire.
5. PACKAGING, LABELING, TRANSPORTATION AND STORAGE
5.1. Each coil of wire must be tied in at least three places with soft galvanized wire in accordance with GOST 3282 or other wire in accordance with regulatory documentation and wrapped with a layer of paper, then with a layer of non-woven materials or fabric made of chemical fibers, or polymer film.
For mechanized packaging, each coil of wire must be wrapped in a layer of cable crepe paper in accordance with GOST 10396 or KMV-170 grade paper, or other crepe paper with equivalent protective properties.
The following are used as packaging materials:
waxed paper in accordance with GOST 9569 (the use of two-layer packaging paper in accordance with GOST 8828 or other paper that provides corrosion protection is allowed);
5.2. Rolls of wire of the same diameter and type can be tied into coils.
5.3. The weight of a skein or coil should not exceed 80 kg.
With the consent of the consumer, increased weight of the skein or coil is allowed. The formation of cargo packages into transport packages is carried out in accordance with GOST 21650, GOST 24597 and the rules for the transportation of goods approved by the relevant departments.
(Changed edition, Amendment No. 1, 2, 3).
5.4. Each coil of wire must have a label firmly attached to it indicating:
trademark or name and trademark of the manufacturer;
wire symbol.
(Changed edition, Amendment No. 1, 2).
5.5. (Deleted, Amendment No. 2).
5.6. Wire is transported by all types of transport in accordance with the rules for the transportation of goods in force for this type of transport.
The placement and securing of cargo in railway vehicles must comply with the technical conditions for loading and securing cargo, approved by the USSR Ministry of Railways.
Wire transportation by rail is carried out in small or carload shipments.
It is allowed to transport wire in universal containers in accordance with GOST 15102, GOST 20435, GOST 22225.
(Changed edition, Amendment No. 3).
5.7. The wire is stored in accordance with the requirements of GOST 15150, storage conditions 5.
(Changed edition, Amendment No. 2).
5.8. Transport marking - according to GOST 14192.
(Introduced additionally, Amendment No. 2).
ANNEX 1
Information
The highest permissible electrical resistance of 1 m copper wire
(r no more than 0.146 Ohm×mm 2 /m)
|
Temperature, °C |
Wire diameter, mm |
||||||
APPENDIX 2
Information
The highest permissible electrical resistance is 1 m of ordinary and
copper wire (r no more than 0.138 Ohm×mm 2 /m)
|
Temperature, °C |
Wire diameter, mm |
||||||
GOST 1668-73
INTERSTATE STANDARD
dateintroduction 01.01.75
This standard applies to steel wire intended for overhead communication lines.
1. MAIN PARAMETERS AND DIMENSIONS1.1. The wire is produced depending on the brand of wire rod:
coppery - M,
ordinary;
by manufacturing accuracy:
normal accuracy,
increased accuracy - P;
depending on the surface density of zinc of two classes:
1st class - 1,
2nd class - 2.
1.2. The diameter of the wire and the maximum deviations along it must correspond to those indicated in the table. 1.
Table 1
1.3. The ovality of the wire (the difference between the largest and smallest diameters of one section) should not exceed the maximum deviations in diameter.
Examples of symbols
Linear wire with a diameter of 4.00 mm, ordinary, increased precision, class 1:
Wire 4P-1 GOST 1668-73
Linear wire with a diameter of 4.00 mm, copper, normal accuracy, class 2:
Wire 4 M-2 GOST 1668-73
1.1 - 1.3 (Changed edition, Amendment No. 3).
2. TECHNICAL REQUIREMENTS2.1. The wire must be manufactured in accordance with the requirements of this standard according to technological regulations approved in the prescribed manner, from wire rod in accordance with the regulatory document.
2.2. The mechanical properties of the wire must comply with the standards specified in table. 2.
table 2
|
Nominal diameter, mm |
Tensile strength, N/mm 2 (kgf/mm 2) |
Relative elongation d 200,% |
Number of bends |
Notes:
1. The manufacturer guarantees that the mechanical properties of wire with a diameter of 2.5 - 6.0 mm comply with the standards given in table. 2 of this standard, after 20 days from the date of manufacture.
2. In the first two days from the moment of heat treatment, the manufacturer is allowed to accept wire with a diameter of 2.5 - 6.0 mm with a temporary tensile strength of at least 330 MPa (34 kgf/mm 2).
2.3. The zinc coating on the wire must be continuous, without gaps or cracks visible without the use of magnifying devices.
Individual influxes of zinc cannot serve as a basis for rejection.
Minor risks, dents, individual roughness of the zinc coating, as well as non-uniformity of the wire surface in color, white spots, sparkles and white deposits in the form of adhered zinc oxide are allowed if the coating can withstand the number of immersions indicated in the table. 3.
Table 3
|
Nominal wire diameter, mm |
Surface density of zinc, g/m2 |
Number of dives lasting 60 s |
|
|
1st class |
2nd class |
||
2.4. The adhesion of the zinc coating to the steel base must be strong. The zinc coating should not crack or peel when the wire is spirally wound in eight tight turns onto a cylindrical rod with the diameter indicated in the table. 3a. Superficial dusty peeling of the zinc coating on wound samples of galvanized wire is not a rejection sign.
Table 3a
2.5. The surface density of zinc and the number of immersions for 60 s in a solution of copper sulfate must correspond to the standards specified in table. 3.
2.6. The electrical resistivity of the wire at a temperature of plus 20 °C should not exceed:
cuprous - 0.146 Ohm×mm 2 /m;
ordinary - 0.138 Ohm×mm 2 /m.
By agreement between the manufacturer and the consumer, the electrical resistivity of the wire should not exceed:
cuprous - 0.138 Ohm×mm 2 /m;
ordinary - 0.130 Ohm×mm 2 /m.
The standards for the highest permissible values of electrical resistance of 1 m of wire are given in Appendices 1, 2 and 3.
2.4 - 2.6. (Changed edition, Amendment No. 3).
2.7. The wire is produced in coils consisting of one piece. The wire should be wound in untangled rows and unwind freely from the skeins. When releasing the skeins from the bindings, the wire should not curl into a figure eight.
2.8. The weight of wire in the coil must correspond to that indicated in the table. 4.
Table 4
|
Wire diameter, mm |
Hank weight, kg, not less |
Estimated weight of 1000 m of wire, kg |
Note. Rolls of wire weighing 50% less than that indicated in the table are allowed. 4 in an amount of no more than 10% of the total mass of wire coils in the batch.
2.7, 2.8. (Changed edition, Amendment No. 2).
3. ACCEPTANCE RULES3.1. Wire is accepted in batches. The batch must consist of wire of the same type and size and be documented in one quality document containing:
wire symbol;
net weight;
results of tests performed;
date of manufacture.
(Changed edition, Amendment No. 2).
3.2. For external inspection and measurement of wire, as well as to check the weight of the coils, 3% of the coils, but not less than three coils, are selected from each batch.
3.3. From the wire adopted in accordance with clause 3.2 of this standard, 3% of the coils, but not less than three coils, are selected to check its mechanical properties, the quality of the zinc coating and electrical resistance.
3.4. If unsatisfactory test results are obtained for at least one of the indicators, repeated tests are carried out on a double number of samples taken from the skeins that were not tested.
The results of repeated tests apply to the entire batch.
3.3, 3.4. (Changed edition, Amendment No. 2).
4. TEST METHODS4.1a. To determine the mechanical properties of the wire, the adhesion of the zinc coating to the steel base, the surface density of zinc, the number of immersions, and electrical resistance, one sample is taken from each controlled coil.
4.1. External inspection of the wire is carried out visually.
4.2. The diameter of the wire is measured with a measuring instrument with scale divisions up to 0.01 mm in two mutually perpendicular directions of the same section in at least three places in the coil. To measure the diameter, select a section of wire with a smooth surface without zinc deposits.
4.3. Tensile testing of wire is carried out according to GOST 10446 on samples with a design length of at least 200 mm.
4.4. The bend test of the wire is carried out according to GOST 1579.
At the request of the consumer, the finished copper wire is checked for copper content in accordance with GOST 22536.8 and GOST 22536.0.
4.6. Testing the quality of zinc coating of wire by coiling is carried out according to GOST 10447.
4.7. The surface density of zinc is determined by gravimetric or volumetric gasometric methods.
The weight method is used for particularly precise determinations and in case of disagreement in assessing the quality of the wire.
The length of the wire sample to determine the surface density of zinc must correspond to the standards specified in table. 5.
Table 5
Samples may be cut into an arbitrary number of sections depending on the test conditions.
(Changed edition, Amendment No. 2).
4.7.1. Volumetric gasometric method
Removal of the zinc coating is carried out in a device consisting of a reservoir and a glass burette with two taps connected to it by a rubber hose, with the samples completely immersed in the solution at ambient temperature until gas evolution stops.
wire samples are taken and the length specified for testing is measured in accordance with the requirements of table. 5;
degrease wire samples in alcohol, benzene or gasoline and wipe with a clean cloth;
dissolve the zinc coating, completely capturing the hydrogen released;
measure the volume of hydrogen released and bring it to normal conditions (pressure 760 mm Hg, temperature 0 ° C), using tables of correction factors;
calculate the average surface density of zinc per 1 m2 of wire surface, ( M) in grams according to the formula
Where V 0- volume of hydrogen under normal conditions, cm 3;
d- nominal diameter of the wire sample, mm;
l- sample length, mm.
Zinc is bled off in an aqueous solution of a mixture of acids:
sulfur according to GOST 4204 - 100 g/dm 3,
salt according to GOST 3118 - 34 g/dm 3
or in a solution of inhibited sulfuric acid prepared as follows: 2 g of Sb 2 O 3 or As 2 O 3 are dissolved in 60 cm 3 of hydrochloric acid according to GOST 3118, density 1.19 g/cm 3 and added to 1 dm 3 of sulfuric acid according to GOST 4204, concentration 80 g/dm3.
The bleed solution is replaced as it becomes depleted.
(Changed edition, Amendment No. 2, 3).
4.7.2. Weight method
The surface density of zinc is determined by dissolving the coating from wire samples in a solution of inhibited sulfuric acid of the composition specified in clause 4.7.1.
The test is carried out in the following order:
samples of galvanized wire are degreased in alcohol, benzene or gasoline and wiped with a clean cloth;
weigh the samples;
dissolve the zinc coating;
wash the samples in distilled water;
wipe with a clean cloth until moisture is removed and weigh again;
measure the actual diameter of the sample after bleeding off the zinc;
calculate the average surface density of zinc per 1 m2 of wire surface ( M 1) in grams according to the formula
Where m- mass of a wire sample (group of samples) before removing the coating, g;
m 1 - mass of wire sample (group of samples) after removing the coating, g;
d- diameter of the wire sample after peeling off the coating, mm.
Quantities m And m 1 is calculated with an accuracy of 0.001 g, the value d- with an accuracy of 0.01 mm, the value of the average surface density of zinc - with an accuracy of 0.1 g/m 2.
(Changed edition, Amendment No. 2).
4.8. The continuity and uniformity of the zinc coating is controlled by immersing a sample of galvanized wire in a solution of copper sulfate, prepared by dissolving one part by weight of dry crystalline copper sulfate according to GOST 4165 in five parts by weight of distilled water and neutralized with an excess of freshly precipitated copper oxide hydrate. After neutralization, the solution must be filtered. The density of the neutralized filtered solution should be 1.114 - 1.116 g/cm3.
The temperature of the copper sulfate solution during the test should be (18 ± 2) °C.
The test procedure is as follows:
samples of wire 150 mm long are taken and washed with alcohol, gasoline or benzene.
If the samples are washed with gasoline or benzene, then they are additionally washed with distilled water and wiped until moisture is removed;
immerse the samples in a solution of copper sulfate to a depth of at least 100 mm.
The samples must be immersed for exactly 1 min.
After each immersion in the solution, the samples are immediately rinsed with distilled water and wiped with a clean cloth. The number of samples simultaneously immersed in the solution should not exceed six.
Wire samples should be in a solution of copper sulfate in a stationary position, without contacting each other and the walls of the vessel.
The permissible number of samples for testing in the same solution of copper sulfate with a volume of 200 cm 3 must correspond to that indicated in the table. 6.
Table 6
If, after a specified number of immersions in the solution, there are areas on the surface of the wire sample covered with copper that does not come off when wiping the sample with cotton wool or a clean cloth, then the sample is considered to have failed the test. Samples are viewed with the naked eye.
The following are allowed on the surface of the samples:
heterogeneity in color and shine;
redness in an area located at a distance of 25 mm from the level of the solution and at a distance of 20 mm from the lower end of the sample immersed in the solution;
brown tint and point redness, disappearing or not increasing in size and intensity of color upon additional immersion of the sample in a solution of copper sulfate for 1 - 2 s.
4.9. Electrical resistance to direct current is determined using a double Thomson bridge with an accuracy of 0.00001 Ohm. At the same time, the temperature of the room in which the test is carried out is measured.
Recalculation of resistance Rt wire 1 m long at a temperature t°C to the resistance of the same wire R 20 at a temperature of 20 °C is produced according to the formula
Electrical resistivity r 20 is calculated using the formula
where is the cross-sectional area of the wire.
5. PACKAGING, LABELING, TRANSPORTATION AND STORAGE5.1. Each coil of wire must be tied in at least three places with soft galvanized wire in accordance with GOST 3282 or other wire in accordance with regulatory documentation and wrapped with a layer of paper, then with a layer of non-woven materials or fabric made of chemical fibers, or polymer film.
For mechanized packaging, each coil of wire must be wrapped in a layer of cable crepe paper in accordance with GOST 10396 or KMV-170 grade paper, or other crepe paper with equivalent protective properties.
The following are used as packaging materials:
waxed paper in accordance with GOST 9569 (the use of two-layer packaging paper in accordance with GOST 8828 or other paper that provides corrosion protection is allowed);
polymer film in accordance with GOST 10354 or GOST 16272, or other polymer film;
containerized canvas stitched or glued fabric, stitching tape from textile industry waste or fabric from chemical fibers according to regulatory documentation.
By agreement between the consumer and the manufacturer, the wire is not packaged.
Wire sent to the Far North and hard-to-reach areas is packaged in accordance with GOST 15846.
5.2. Rolls of wire of the same diameter and type can be tied into coils.
5.3. The weight of a skein or coil should not exceed 80 kg.
With the consent of the consumer, increased weight of the skein or coil is allowed.
The formation of cargo packages into transport packages is carried out in accordance with GOST 21650, GOST 24597 and the rules for the transportation of goods approved by the relevant departments.
(Changed edition, Amendment No. 1, 2, 3).
5.4. Each coil of wire must have a label firmly attached to it indicating:
trademark or name and trademark of the manufacturer;
wire symbol.
(Changed edition, Amendment No. 1, 2).
5.5. (Deleted, Amendment No. 2).
5.6. Wire is transported by all types of transport in accordance with the rules for the transportation of goods in force for this type of transport.
The placement and securing of cargo in railway vehicles must comply with the technical conditions for loading and securing cargo, approved by the USSR Ministry of Railways.
Wire transportation by rail is carried out in small or carload shipments.
It is allowed to transport wire in universal containers in accordance with GOST 15102, GOST 20435, GOST 22225.
(Changed edition, Amendment No. 3).
5.7. The wire is stored in accordance with the requirements of GOST 15150, storage conditions 5.
(Changed edition, Amendment No. 2).
5.8. Transport marking - according to GOST 14192.
(Introduced additionally, Amendment No. 2).
ANNEX 1Information
The highest permissible electrical resistance of 1 m of copper wire (r no more than 0.146 Ohm×mm 2 /m)
|
Temperature, °C |
Wire diameter, mm |
||||||
Information
The highest permissible electrical resistance of 1 m of ordinary and copper wire (r no more than 0.138 Ohm × mm 2 / m)
|
Temperature, °C |
Wire diameter, mm |
||||||
APPENDIX 2. (Changed edition, Amendment No. 3).
APPENDIX 3Information
The highest permissible electrical resistance of 1 m of ordinary wire (no more than 0.130 Ohm × mm 2 / m)
APPENDIX 3. (Introduced additionally, Amendment No. 3).
INFORMATION DATA1. DEVELOPED AND INTRODUCED by the USSR Ministry of Ferrous Metallurgy
2. APPROVED AND ENTERED INTO EFFECT by Resolution of the State Committee of Standards of the Council of Ministers of the USSR dated 03.08.73 No. 1914
3. INSTEAD GOST 1668-46
4. REFERENCE REGULATIVE AND TECHNICAL DOCUMENTS
|
Number of paragraph, subparagraph |
|
|
GOST 1579-93 |
|
|
GOST 3118-77 |
|
|
GOST 3282-74 |
|
|
GOST 4165-78 |
|
|
GOST 4204-77 |
|
|
GOST 8828-89 |
|
|
GOST 9569-79 |
|
|
GOST 10354-82 |
|
|
GOST 10396-84 |
|
|
GOST 10446-80 |
|
|
GOST 10447-93 |
|
|
GOST 14192-96 |
|
|
GOST 15102-75 |
|
|
GOST 15150-69 |
|
|
GOST 15846-79 |
|
|
GOST 16272-79 |
|
|
GOST 20435-75 |
|
|
GOST 21650-76 |
|
|
GOST 22225-76 |
|
|
GOST 22536.0-87 |
|
|
GOST 22536.8-87 |
|
|
GOST 24597-81 |
5. The validity period was lifted according to Protocol No. 4-93 of the Interstate Council for Standardization, Metrology and Certification (IUS 4-94)
6. EDITION with Amendments No. 1, 2, 3, approved in February 1983, December 1984, March 1989 (IUS 5-83, 3-85, 6-89)
1.1. The wire is produced depending on the brand of wire rod:
coppery - M,
ordinary;
by manufacturing accuracy:
normal accuracy,
increased accuracy - P;
depending on the surface density of zinc of two classes:
1st class - 1,
2nd class - 2.
1.2. The diameter of the wire and the maximum deviations along it must correspond to those indicated in the table. 1.
Table 1
|
Nominal diameter |
Maximum deviation |
|
|
increased accuracy |
normal accuracy |
|
|
1,50 |
±0.03 |
±0.06 |
|
2,00 |
±0.04 |
|
|
2,50 |
||
|
3,00 |
±0.05 |
|
|
4,00 |
±0.06 |
±0.08 |
|
5,00 |
||
|
6,00 |
||
1.3. The ovality of the wire (the difference between the largest and smallest diameters of one section) should not exceed the maximum deviations in diameter.
Examples of symbols
Linear wire with a diameter of 4.00 mm, ordinary, increased precision, class 1:
Wire 4P-1 GOST 1668-73
Linear wire with a diameter of 4.00 mm, copper, normal accuracy, class 2:
Wire 4 M-2 GOST 1668-73
1.1 - 1.3
2. TECHNICAL REQUIREMENTS
2.1. The wire must be manufactured in accordance with the requirements of this standard according to technological regulations approved in the prescribed manner, from wire rod in accordance with the regulatory document.
2.2. The mechanical properties of the wire must comply with the standards specified in table. 2.
Table 2
|
Nominal diameter, mm |
Tensile strength, N/mm 2 (kgf/mm 2) |
Relative extensiond 200 ,% |
Number of bends |
|
no less |
|||
|
1,50 |
640 (65) |
||
|
2,00 |
|||
|
2,50 |
360 (37) |
||
|
3,00 |
|||
|
4,00 |
|||
|
5,00 |
|||
|
6,00 |
|||
Notes:
1. The manufacturer guarantees that the mechanical properties of wire with a diameter of 2.5 - 6.0 mm comply with the standards given in table. 2 of this standard, after 20 days from the date of manufacture.
2. In the first two days from the moment of heat treatment, the manufacturer is allowed to accept wire with a diameter of 2.5 - 6.0 mm with a temporary tensile strength of at least 330 MPa (34 kgf/mm 2).
2.3. The zinc coating on the wire must be continuous, without gaps or cracks visible without the use of magnifying devices.
Individual influxes of zinc cannot serve as a basis for rejection.
Minor risks, dents, individual roughness of the zinc coating, as well as non-uniformity of the wire surface in color, white spots, sparkles and white deposits in the form of adhered zinc oxide are allowed if the coating can withstand the number of immersions indicated in the table. 3.
Table 3
|
Nominal wire diameter, mm |
Surface density of zinc, g/m2 |
Number of dives lasting 60 s |
|
|
1st class |
2nd class |
||
|
no less |
|||
|
1,50 |
|||
|
2,00 |
|||
|
2,50 |
|||
|
3,00 |
|||
|
4,00 |
|||
|
5,00 |
|||
|
6,00 |
|||
2.4. The adhesion of the zinc coating to the steel base must be strong. The zinc coating should not crack or peel when the wire is spirally wound in eight tight turns onto a cylindrical rod with the diameter indicated in the table. 3a. Superficial dusty peeling of the zinc coating on wound samples of galvanized wire is not a rejection sign.
Table 3a
2.5. The surface density of zinc and the number of immersions for 60 s in a solution of copper sulfate must correspond to the standards specified in table. 3.
2.6. The electrical resistivity of the wire at a temperature of plus 20 °C should not exceed:
cuprous - 0.146 Ohm × mm 2 /m;
ordinary - 0.138 Ohm × mm 2 /m.
By agreement between the manufacturer and the consumer, the electrical resistivity of the wire should not exceed:
cuprous - 0.138 Ohm × mm 2 /m;
ordinary - 0.130 Ohm × mm 2 /m.
The standards for the highest permissible values of electrical resistance of 1 m of wire are given in appendices, and.
2.4 - 2.6. (Changed edition, Amendment No. 3).
2.7. The wire is produced in coils consisting of one piece. The wire should be wound in untangled rows and unwind freely from the skeins. When releasing the skeins from the bindings, the wire should not curl into a figure eight.
2.8. The weight of wire in the coil must correspond to that indicated in the table. 4.
Table 4
|
Wire diameter, mm |
Hank weight, kg, not less |
Estimated weight of 1000 m of wire, kg |
|
13,87 |
||
|
24,65 |
||
|
38,54 |
||
|
55,50 |
||
|
98,7 |
||
|
154,2 |
||
|
221,9 |
Note . Rolls of wire weighing 50% less than that indicated in the table are allowed. 4 in an amount of no more than 10% of the total mass of wire coils in the batch.
2.7, 2.8. (Changed edition, Amendment No. 2).
3. ACCEPTANCE RULES
3.1. Wire is accepted in batches. The batch must consist of wire of the same type and size and be documented in one quality document containing:
wire symbol;
net weight;
results of tests performed;
date of manufacture.
(Changed edition, Amendment No. 2).
3.2. For external inspection and measurement of wire, as well as to check the weight of the coils, 3% of the coils, but not less than three coils, are selected from each batch.
3.3. From the wire adopted in accordance with clause 3.2 of this standard, 3% of the coils, but not less than three coils, are selected to check its mechanical properties, the quality of the zinc coating and electrical resistance.
3.4. If unsatisfactory test results are obtained for at least one of the indicators, repeated tests are carried out on a double number of samples taken from the skeins that were not tested.
The results of repeated tests apply to the entire batch.
3.3, 3.4. (Changed edition, Amendment No. 2).
4. TEST METHODS
4.1a. To determine the mechanical properties of the wire, the adhesion of the zinc coating to the steel base, the surface density of zinc, the number of immersions, and electrical resistance, one sample is taken from each controlled coil.
4.1. External inspection of the wire is carried out visually.
4.2. The diameter of the wire is measured with a measuring instrument with scale divisions up to 0.01 mm in two mutually perpendicular directions of the same section in at least three places in the coil. To measure the diameter, select a section of wire with a smooth surface without zinc deposits.
4.3. Tensile testing of wire is carried out according to GOST 10446 on samples with a design length of at least 200 mm.
4.4. Wire bend testing is carried out according to GOST 1579.
4.5. The copper content in the wire is certified by a document from the supplier of the original metal.
At the consumer's request, the finished copper wire is checked for copper content in accordance with GOST 22536.8 and GOST 22536.0.
4.6. Testing the quality of zinc coating of wire by coiling is carried out according to GOST 10447.
4.7. The surface density of zinc is determined by gravimetric or volumetric gasometric methods.
The weight method is used for particularly precise determinations and in case of disagreement in assessing the quality of the wire.
The length of the wire sample to determine the surface density of zinc must correspond to the standards specified in table. 5.
Table 5
Samples may be cut into an arbitrary number of sections depending on the test conditions.
(Changed edition, Amendment No. 2).
4.7.1. Volumetric gasometric method
Removal of the zinc coating is carried out in a device consisting of a reservoir and a glass burette with two taps connected to it by a rubber hose, with the samples completely immersed in the solution at ambient temperature until gas evolution stops.
wire samples are taken and the length specified for testing is measured in accordance with the requirements of table. 5;
degrease wire samples in alcohol, benzene or gasoline and wipe with a clean cloth;
dissolve the zinc coating, completely capturing the hydrogen released;
measure the volume of hydrogen released and bring it to normal conditions (pressure 760 mm Hg, temperature 0 ° C), using tables of correction factors;
calculate the average surface density of zinc per 1 m2 of wire surface, ( M) in grams according to the formula
Where V 0- volume of hydrogen under normal conditions, cm 3;
d- nominal diameter of the wire sample, mm;
l- sample length, mm.
Zinc is bled off in an aqueous solution of a mixture of acids:
sulfur according to GOST 4204 - 100 g/dm 3,
salt according to GOST 3118 - 34 g/dm 3
or in a solution of inhibited sulfuric acid prepared as follows: 2 g of Sb 2 O 3 or As 2 O 3 are dissolved in 60 cm 3 of hydrochloric acid according to GOST 3118, density 1.19 g/cm 3 and added to 1 dm 3 of sulfuric acid according to GOST 4204, concentration 80 g/dm3.
The bleed solution is replaced as it becomes depleted.
(Changed edition, Amendment No. 2, 3).
4.7.2. Weight method
The surface density of zinc is determined by dissolving the coating from wire samples in a solution of inhibited sulfuric acid of the composition specified in.
The test is carried out in the following order:
samples of galvanized wire are degreased in alcohol, benzene or gasoline and wiped with a clean cloth;
weigh the samples;
dissolve the zinc coating;
wash the samples in distilled water;
wipe with a clean cloth until moisture is removed and weigh again;
measure the actual diameter of the sample after bleeding off the zinc;
calculate the average surface density of zinc per 1 m2 of wire surface ( M 1) in grams according to the formula
Where m- mass of a wire sample (group of samples) before removing the coating, g;
m 1 - mass of wire sample (group of samples) after removing the coating, g;
d- diameter of the wire sample after peeling off the coating, mm.
Quantities m And m 1 is calculated with an accuracy of 0.001 g, the value d- With accurate to 0.01 mm, the value of the average surface density of zinc - accurate to 0.1 g/m 2.
(Changed edition, Amendment No. 2).
4.8. The continuity and uniformity of the zinc coating is controlled by immersing a sample of galvanized wire in a solution of copper sulfate, prepared by dissolving one part by weight of dry crystalline copper sulfate according to GOST 4165 in five parts by weight of distilled water and neutralized with an excess of freshly precipitated copper oxide hydrate. After neutralization, the solution must be filtered. The density of the neutralized filtered solution should be 1.114 - 1.116 g/cm3.
The temperature of the copper sulfate solution during the test should be (18 ± 2) ° C.
The test procedure is as follows:
samples of wire 150 mm long are taken and washed with alcohol, gasoline or benzene.
If the samples are washed with gasoline or benzene, then they are additionally washed with distilled water and wiped until moisture is removed;
immerse the samples in a solution of copper sulfate to a depth of at least 100 mm.
The samples must be immersed for exactly 1 min.
After each immersion in the solution, the samples are immediately rinsed with distilled water and wiped with a clean cloth. The number of samples simultaneously immersed in the solution should not exceed six.
Wire samples should be in a solution of copper sulfate in a stationary position, without contacting each other and the walls of the vessel.
The permissible number of samples for testing in the same solution of copper sulfate with a volume of 200 cm 3 must correspond to that indicated in the table. 6.
Table 6
|
Wire diameter, mm |
Number of samples |
|
2,5 - 3,0 |
|
|
4,0 - 6,0 |
If, after a specified number of immersions in the solution, there are areas on the surface of the wire sample covered with copper that does not come off when wiping the sample with cotton wool or a clean cloth, then the sample is considered to have failed the test. Samples are viewed with the naked eye.
The following are allowed on the surface of the samples:
heterogeneity in color and shine;
redness in an area located at a distance of 25 mm from the level of the solution and at a distance of 20 mm from the lower end of the sample immersed in the solution;
brown tint and point redness, disappearing or not increasing in size and intensity of color upon additional immersion of the sample in a solution of copper sulfate for 1 - 2 s.
4.9. Electrical resistance to direct current is determined using a double Thomson bridge with an accuracy of 0.00001 Ohm. At the same time, the temperature of the room in which the test is carried out is measured.
Recalculation of resistance Rt wire 1 m long at a temperature t°C to the resistance of the same wire R 20 at a temperature of 20 °C is produced according to the formula
Electrical resistivity r 20 calculated by the formula
where is the cross-sectional area of the wire.
5. PACKAGING, LABELING, TRANSPORTATION AND STORAGE
5.1. Each coil of wire must be tied in at least three places with soft galvanized wire in accordance with GOST 3282 or other wire in accordance with regulatory documentation and wrapped with a layer of paper, then with a layer of non-woven materials or fabric made of chemical fibers, or polymer film.
For mechanized packaging, each coil of wire must be wrapped in a layer of cable crepe paper in accordance with GOST 10396 or KMV-170 grade paper, or other crepe paper with equivalent protective properties.
The following are used as packaging materials:
waxed paper in accordance with GOST 9569 (the use of two-layer packaging paper in accordance with GOST 8828 or other paper that provides corrosion protection is allowed);
polymer film in accordance with GOST 10354 or GOST 16272, or other polymer film;
container stitched or glued fabric, stitching tape from textile industry waste or fabric from chemical fibers according to regulatory documentation.
By agreement between the consumer and the manufacturer, the wire is not packaged.
Wire sent to the Far North and hard-to-reach areas is packaged in accordance with GOST 15846.
5.2. Rolls of wire of the same diameter and type can be tied into coils.
5.3. The weight of a skein or coil should not exceed 80 kg.
With the consent of the consumer, increased weight of the skein or coil is allowed.
The formation of cargo packages into transport packages is carried out in accordance with GOST 21650, GOST 24597 and the rules for the transportation of goods approved by the relevant departments.
(Changed edition, Amendment No. 1, 2, 3).
5.4. Each coil of wire must have a label firmly attached to it indicating:
trademark or name and trademark of the manufacturer;
wire symbol.
(Changed edition, Amendment No. 1, 2).
5.5. (Deleted, Amendment No. 2).
5.6. Wire is transported by all types of transport in accordance with the rules for the transportation of goods in force for this type of transport.
The placement and securing of cargo in railway vehicles must comply with the technical conditions for loading and securing cargo, approved by the USSR Ministry of Railways.
Wire transportation by rail is carried out in small or carload shipments.
It is allowed to transport wire in universal containers in accordance with GOST 15102, GOST 20435, GOST 22225.
(Changed edition, Amendment No. 3).
5.7. The wire is stored in accordance with the requirements of GOST 15150, storage conditions 5.
(Changed edition, Amendment No. 2).
5.8. Transport marking - according to GOST 14192.
(Introduced additionally, Amendment No. 2).
ANNEX 1
Information
The highest permissible electrical resistance of 1 m of copper wire ( r no more than 0.146 Ohm × mm 2 /m)
|
Temperature, °C |
Wire diameter, mm |
||||||
|
0,00493 |
0,00709 |
0,01108 |
0,01971 |
0,02839 |
0,04436 |
0,07887 |
|
|
0,00495 |
0,00713 |
0,01114 |
0,01981 |
0,02852 |
0,04457 |
0,07925 |
|
|
0,00497 |
0,00716 |
0,01119 |
0,01990 |
0,02866 |
0,04478 |
0,07962 |
|
|
0,00500 |
0,00719 |
0,01124 |
0,01999 |
0,02879 |
0,04499 |
0,08000 |
|
|
0,00502 |
0,00723 |
0,01129 |
0,02009 |
0,02893 |
0,04520 |
0,08037 |
|
|
0,00504 |
0,00726 |
0,01135 |
0,02018 |
0,02906 |
0,04542 |
0,08075 |
|
|
0,00507 |
0,00729 |
0,01140 |
0,02027 |
0,02920 |
0,04563 |
0,08113 |
|
|
0,00509 |
0,00733 |
0,01145 |
0,02037 |
0,02933 |
0,04584 |
0,08151 |
|
|
0,00511 |
0,00736 |
0,01150 |
0,02046 |
0,02947 |
0,04605 |
0,08188 |
|
|
0,00514 |
0,00740 |
0,01156 |
0,02056 |
0,02961 |
0,04626 |
0,08226 |
|
|
0,00516 |
0,00743 |
0,01161 |
0,02065 |
0,02974 |
0,04647 |
0,08263 |
|
|
0,00518 |
0,00746 |
0,01166 |
0,02074 |
0,02988 |
0,04668 |
0,08301 |
|
|
0,00521 |
0,00750 |
0,01172 |
0,02084 |
0,03001 |
0,04689 |
0,08338 |
|
|
0,00523 |
0,00753 |
0,01177 |
0,02093 |
0,03015 |
0,04710 |
0,08376 |
|
|
0,00525 |
0,00757 |
0,01182 |
0,02102 |
0,03028 |
0,04731 |
0,08413 |
|
|
0,00528 |
0,00760 |
0,01187 |
0,02112 |
0,03042 |
0,04753 |
0,08451 |
|
APPENDIX 2
Information
The highest permissible electrical resistance of 1 m of ordinary and copper wire ( r no more than 0.138 Ohm × mm 2 /m)
|
Temperature, ° WITH |
Wire diameter, mm |
||||||
|
0,00466 |
0,00671 |
0,01048 |
0,01863 |
0,02683 |
0,04192 |
0,07455 |
|
|
0,00468 |
0,00674 |
0,01053 |
0,01872 |
0,02696 |
0,04212 |
0,07491 |
|
|
0,00470 |
0,00677 |
0,01058 |
0,01881 |
0,02709 |
0,04232 |
0,07526 |
|
|
0,00472 |
0,00681 |
0,01063 |
0,01890 |
0,02722 |
0,04252 |
0,07562 |
|
|
0,00475 |
0,00684 |
0,01068 |
0,01899 |
0,02734 |
0,04272 |
0,07597 |
|
|
0,00477 |
0,00687 |
0,01073 |
0,01908 |
0,02747 |
0,04292 |
0,07633 |
|
|
0,00479 |
0,00690 |
0,01078 |
0,01917 |
0,02760 |
0,04312 |
0,07668 |
|
|
0,00481 |
0,00693 |
0,01083 |
0,01925 |
0,02774 |
0,04332 |
0,07704 |
|
|
0,00484 |
0,00697 |
0,01088 |
0,01934 |
0,02785 |
0,04352 |
0,07739 |
|
|
0,00486 |
0,00700 |
0,01093 |
0,01943 |
0,02798 |
0,04372 |
0,07775 |
|
|
0,00488 |
0,00703 |
0,01098 |
0,01952 |
0,02811 |
0,04392 |
0,07810 |
|
|
0,00490 |
0,00706 |
0,01103 |
0,01961 |
0,02824 |
0,04412 |
0,07846 |
|
|
0,00492 |
0,00709 |
0,01108 |
0,01970 |
0,02837 |
0,04432 |
0,07881 |
|
|
0,00495 |
0,00713 |
0,01113 |
0,01979 |
0,02849 |
0,04452 |
0,07917 |
|
|
0,00497 |
0,00716 |
0,01118 |
0,01988 |
0,02862 |
0,04472 |
0,07952 |
|
|
0,00499 |
0,00719 |
0,01123 |
0,01995 |
0,02875 |
0,04494 |
0,07968 |
|
APPENDIX 2.(Changed edition, Amendment No. 3).
APPENDIX 3
Information
The highest permissible electrical resistance of 1 m of ordinary wire (no more than 0.130 Ohm × mm 2 /m)
|
Temperature, °C |
Wire diameter, mm |
||||||
|
2,5 |
2,0 |
1,5 |
|||||
|
10 |
0,00438 |
0,00632 |
0,00987 |
Categories
| |||
