Some standard content:
GB/T39521998
This standard is a revision of GB3952.1～3952.4—898 Electrician Round Rod. Compared with the original standard, this standard has been modified as follows:
1. The standard name is changed to "Electrical Copper Wire Rod", 2. The original four sub-standards are combined and compiled in the standard structure, and no sub-standards are set up, and many repetitive standards are cancelled. 3. The main technical parameters and technical contents have been greatly improved. The nominal diameter and allowable deviation of steel wire rod in this standard are equivalent to the requirements of IS04738:1982 "Copper Wire Rod" and BS6926-1988 "Electrical Copper - High Conductor Rod" standards; the chemical composition requirements are based on the US ASTMB49-92 "Redrawn Copper Wire Rod for Electrical Use" standard, and are revised based on GB/T467 "Cathode Copper" and GB/T468 "Electrical Copper Wire Ingot" standards: the lower limit of the mechanical properties of hot copper wire is 35%, which is equivalent to the requirements of the German DIN17652-82 "Copper Wire Rod" standard, which is higher than the 30% requirement in other foreign standards. The mechanical properties of hard copper wire rod are improved compared with the original standard; the sampling methods and sampling quantity requirements for inspection batches and various performance tests are revised with reference to the British BS6926-1988 standard, among which the sampling quantity requirements of this standard are stricter than the requirements of BS6926-1988 standard. 4. Pay attention to the consistency with other relevant national standards. The format and method of standard writing comply with the provisions of GB/T1.1-1993. Compared with the standards of advanced foreign countries, this standard has reached the international advanced level. From the date of implementation, this standard will replace GB3952.1~3952.4-89. This standard is proposed by China Nonferrous Metals Industry Corporation. This standard was issued by Beijing Sales Factory, and the Standard Metrology Institute of China Nonferrous Metals Industry Corporation and Tongling Nonferrous Metals Company were responsible for drafting. This standard was jointly drafted by Beijing Copper Factory, Standard Metrology Institute of China Nonferrous Metals Industry Corporation, Tongling Nonferrous Metals Company, Changzhou Dongfang Xinyuan Copper Co., Ltd., Shenyang Smelter, and Yunnan Smelter. The main drafters of this standard are: He Xinzi, Yao Chuan, Chen Mingyong, Chen Yi, Liu Wanrong, Zhao Hua, Li Xiaoli, Wen Xiaoyun, Sun Lijun, and Xing Wei.
1 Scope
National Standard of the People's Republic of ChinabZxz.net
Copper drawing stock for electrical purposes
Copper drawing stock for electrical purposesGB/T3952—1998
Replaces GB3952.1~3952.4—89
This standard specifies the requirements, test methods, inspection rules and marking, packaging, transportation and storage of copper drawing stock for electrical purposes. This standard applies to circular copper drawing stock with a diameter of 6.0-35.0mm for further drawing of wire or other copper conductors for electrical purposes. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards are subject to revision, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB4909.2-8 Bare wire test method Dimension measurement GB4909.385 Bare wire test method Tensile test GB4909.1-85 Bare wire test method Torsion test GB/T3048.2-94 Test method for resistivity of metal conductor materials of wires and cables GB/T5121.1~5121.23-1996 Chemical analysis method for copper and steel alloys GB/T13293-91 Chemical analysis method for high-purity cathode copper 3 Order form (or contract) content
The order form (or contract) for the products listed in this standard shall include the following contents: 3.1 Product name.
3.2 Brand, state, specification.
3.3 Weight.
3.4 Standard number.
4 Requirements
4.1 Product classification
4.1.1 Brand, state, specification
The brand, state and specification of copper wire shall comply with the requirements of Table 1. Table 1 Brand, state, specification
TUI,TU2
Approved by State Administration of Quality and Technical Supervision on July 15, 1998
Hot (R)
Hot (R)
Hard (Y)
Diameter + mm
6. 0~35. 0
6, 0~12. 0
Implemented on February 1, 1999
4.1.2 Marking example
GB/T3952—1998
Example 1. The copper wire with brand T1, hot state and diameter of 8.0 mm is marked as: copper wire T1R $8.0 GB/T 3952—1998 Example 2: The copper wire with the grade of TU2, hard state and the diameter of 10.0mm is marked as: Copper wire TU2Y410.0 GB/T3952—1998 4.2 Chemical composition 4.2.1 The chemical composition of T1 and TU1 copper wires shall comply with the requirements of Table 2 Table 2 Chemical composition of T1 and TU1 copper wires Element group Impurity elements Total impurity element content Not more than 0.000 20 0.000 20 0.000 20 0.000 20 Note: The oxygen content of TI shall not be more than 0.045; the oxygen content of TL1 shall not be more than 0.001 0.4.2.2 The chemical composition of T2 and TU2 copper wire shall comply with the provisions of Table 3. Total content of Cu-AR
0.0000 0.0000 0.0000
Table 3 Chemical composition of T2 and TU2 copper wire Cu-AR
Not less than
Impurity element content
Not more than
Note: The oxygen content of T2 shall not be greater than 0.050; the oxygen content of T1J2 shall not be greater than 0.0010.4.2.3 The chemical composition of T3 copper wire shall comply with the provisions of Table 4. N
Not greater than
Cu I Ag
Not less than
Note: The hydrogen content of T3 should not be less than 0.00. 4.3 Dimensions and their allowable deviations
GB/T 3952-1998
Table 4 Chemical composition of T3 steel wire rod
Impurity content
0 005
4.3.1 The diameter and allowable deviation of copper wire rod shall comply with the provisions of Table 5, and shall not be greater than
Table 5 Diameter and allowable deviation
Nominal diameter
Allowable deviation
6. 0~ 6. 3.5
>6. 35~~12, 0
>12,0--19. 0
4.3.2 Copper wire should be supplied in coils, each coil should be a continuous wire, and welding is not allowed. 4.4 Mechanical properties
219, 0--25. 0
41,001
2*25. 0~-35. 0
The mechanical properties of copper wire should be in accordance with the requirements of Table 6. After full annealing, the hard copper wire should meet the requirements of the elongation rate of the corresponding grade of hot products in Table 6.
Table 6 Tensile strength and elongation
T2, T3, TU2
4.5 Rotational properties
6. (1-~7. 0
27. 0~8. 0
8. 0~9. 0
>9. 0~10. 0
10.0~11.0
=11. (1~12. (0
Tensile strength, N/mm
not less than
Elongation, %
not less than
T1, T2, T3 of diameter 6. -~22. 0 nim The brand copper wire should be subjected to a torsion test. After torsion, there should be no wrinkles and inclusion defects + bright gold cracks, which shall not be used as the basis for judging unqualified products. 4.6 Electrical properties
4.6.1 When the sample specified in 5.5.2 is used, the resistivity of the wire should comply with the provisions of Table 7. Table 7 Resistivity
T2, T3, TI:2
Residual resistivity%2·mm*/m
Not more than
0. 017 07
0. 017 24
1.(017 50
4.6.2 When the sample specified in 5.5.3 is used, the resistivity of the wire should comply with the specified indicators of the hot products of the corresponding brand in Table 7. 4.7 Surface quality
4.7.1 The copper wire should be round and uniform in size.
GB/T 3952 - 1998
4.7.2 The copper wire surface should not have wrinkles.Flash, cracks, inclusions and other defects that are harmful to use. 5 Test methods
5.1 Chemical analysis method
The chemical composition analysis method of T1 and TUJ1 steel wire rods shall be carried out in accordance with the provisions of GB/T13293; the chemical composition analysis method of T2, T3, TU2 copper wire rods shall be carried out in accordance with the provisions of GB/T5121. 5.2 Dimension measurement method
The dimension measurement method of copper wire rods shall be carried out in accordance with the provisions of GB4909.2. 5.3 Mechanical property test method
The room temperature tensile test of copper wire rods shall be carried out in accordance with the provisions of GB 4909.3. 5.4 Torsion test method
5.4.1 The torsion test shall be carried out in accordance with the provisions of GB 4909.4. 5.4.2 The specimen shall be sampled from the copper wire rods that have passed the inspections in 4.7.1 and 4.7.2. The original gauge length is 3mtm, the torsion speed should not exceed 30r/min, rotate 10 times around the axis of the sample, and then rotate 10 times in the opposite direction. 5.5 Electrical performance test method
5.5.1 The test method for resistivity of copper wire shall be carried out in accordance with the provisions of GB3048.2. 5.5.2 The resistivity test can be carried out directly on the copper wire sample that has been pickled but not further processed and annealed. 5.5.3 The resistivity test can also be prepared and measured according to the following method: the sample is pickled and processed to a diameter of 2 mm, the pool is removed, and it is annealed in a protective atmosphere at 500-550℃ for 30min, and then quickly cooled in the same protective atmosphere or quickly transferred to water in air for cooling.
5.5.4 The arbitration test shall be carried out in accordance with 5.5.3. 5.6 Surface quality inspection method
The surface quality of the copper wire is inspected by daylight. 6 Inspection rules
6.1 Inspection and acceptance
6.1.1 Copper wire should be inspected by the supplier's technical supervision department to ensure that the product quality conforms to the provisions of this standard and fill in the quality certificate. 6.1.2 The buyer should inspect the received products according to the provisions of this standard. If the inspection results do not conform to the provisions of this standard, it should be reported to the supplier within 1 month from the date of receipt of the product, and the supplier and buyer should negotiate to resolve the problem. If arbitration is required, the arbitration sampling shall be carried out by both the supplier and the buyer, and the arbitration inspection results shall be the final judgment results.
6.2 Batches
Copper wire should be submitted for acceptance in batches, and each batch should consist of copper wires of the same brand, state and specification. The weight of each batch should not exceed 60t. 6.3 Arbitration inspection items
When the supplier and the buyer have disputes over the chemical composition, dimensional deviation, mechanical properties, torsional characteristics, electrical properties and surface quality of the copper wire, single or multiple arbitration inspections can be carried out on the content of the dispute. 6.4 Sampling method and sampling quantity
6.4. Sampling method and sampling quantity
Depending on the different inspection items, the sampling quantity of each batch of copper wire pieces shall be calculated by the two methods specified in Table 8, namely, by the number of rolls or by weight. The final sampling method shall be determined based on the larger number of sampling quantities, and the sampling quantity shall be determined by this method. The corresponding number of samples shall be randomly selected from the batch of copper wire pieces.
Chemical or analytical
Test
GB/T 3952—1998
Table 8 Sampling method and sampling quantity
Other components
Electrical properties
Mechanical properties
Torsional properties
Surface quality and dimensional deviation
6.4.2 Preparation of samples for chemical composition analysis
Sampling method and sampling quantity
Take a sample every 5 rolls or every 20 t
Take a sample every 15 rolls or every 30 t
Take a sample every 15 rolls or every 30 t
Inspect each roll
For the preparation of samples for chemical composition analysis, the sample surface should be peeled off first, and the sample should be prepared into a sample by machining. Lubricants should not be used during the machining process, and the material should be kept from oxidation. Take equal amounts of the scraps made from each sample of the batch and combine them into a large sample. The total weight of the large sample shall not be less than 6008t. Mix the large sample thoroughly and use a magnet to remove the iron brought in during processing. Use the reduction method to divide it into four equal parts, one for the supplier, one for the buyer, one for arbitration analysis, and one for standby. 6.5 Determination of inspection results
If the chemical composition and electrical properties are unqualified, it will be judged as a defective product; if the mechanical properties, torsion characteristics, surface quality and dimensional deviation are unqualified, it will be judged as a defective product.
7 Quality certificate and marking, packaging, transportation and storage 7.1 Quality certificate
Each batch of copper wire should also be accompanied by a product quality certificate, indicating: a) manufacturer name;
b) product name;
c) product brand, status and specifications;
d) batch number;
e) net weight and number of pieces;
f) various inspection results and stamp of the technical supervision department;
h) date of publication.
7.2 Marking
Each roll of qualified wire should be labeled with the following contents: a) Manufacturer name;
h) Product trademark:
c) Product brand, status, specification:
d) Net weight;
e) Batch number:
f) Production phase II;
) Inspection stamp of the technical supervision department of the manufacturer. 7.3 Packaging
7.3.1 Copper wire should be packed in rolls and well tied. 7.3.2 Measures should be taken to prevent moisture, pollution and mechanical damage. 7.3.3 The packaging method may be stipulated by mutual agreement. 7.4
Transport and storage
GB/T3952—1998
During storage, handling and transportation, care should be taken to protect the copper wire from mechanical damage, moisture and corrosion of corrosive substances.Sampling method and number of joint samples
Depending on the different inspection items, the sampling quantity of each batch of copper wire pieces shall be calculated by the two methods specified in Table 8, namely, by the number of rolls or by weight. The final sampling method shall be determined based on the larger number of sampling quantities, and the sampling number shall be determined by this method. The corresponding number of samples shall be randomly selected from the batch of copper wire pieces.
Chemical or analytical
Test
GB/T 3952—1998
Table 8 Sampling method and sampling quantity
Other components
Electrical properties
Mechanical properties
Torsional properties
Surface quality and dimensional deviation
6.4.2 Preparation of samples for chemical composition analysis
Sampling method and sampling quantity
Take a sample every 5 rolls or every 20 t
Take a sample every 15 rolls or every 30 t
Take a sample every 15 rolls or every 30 t
Inspect each roll
For the preparation of samples for chemical composition analysis, the sample surface should be peeled off first, and the sample should be prepared into a sample by machining. Lubricants should not be used during the machining process, and the material should be kept from oxidation. Take equal amounts of the scraps made from each sample of the batch and combine them into a large sample. The total weight of the large sample shall not be less than 6008t. Mix the large sample thoroughly and use a magnet to remove the iron brought in during processing. Use the reduction method to divide it into four equal parts, one for the supplier, one for the buyer, one for arbitration analysis, and one for standby. 6.5 Determination of inspection results
If the chemical composition and electrical properties are unqualified, it will be judged as a defective product; if the mechanical properties, torsion characteristics, surface quality and dimensional deviation are unqualified, it will be judged as a defective product.
7 Quality certificate and marking, packaging, transportation and storage 7.1 Quality certificate
Each batch of copper wire should also be accompanied by a product quality certificate, indicating: a) manufacturer name;
b) product name;
c) product brand, status and specifications;
d) batch number;
e) net weight and number of pieces;
f) various inspection results and stamp of the technical supervision department;
h) date of publication.
7.2 Marking
Each roll of qualified wire should be labeled with the following: a) Manufacturer name;
h) Product trademark:
c) Product brand, status, specification:
d) Net weight;
e) Batch number:
f) Production phase II;
) Inspection stamp of the technical supervision department of the manufacturer. 7.3 Packaging
7.3.1 Copper wire should be packed in rolls and well tied. 7.3.2 Measures should be taken to prevent moisture, pollution and mechanical damage. 7.3.3 The packaging method may be stipulated by mutual agreement. 7.4
Transport and storage
GB/T3952—1998
During storage, handling and transportation, care should be taken to protect the copper wire from mechanical damage, moisture and corrosion of corrosive substances.Sampling method and number of joint samples
Depending on the different inspection items, the sampling quantity of each batch of copper wire pieces shall be calculated by the two methods specified in Table 8, namely, by the number of rolls or by weight. The final sampling method shall be determined based on the larger number of sampling quantities, and the sampling number shall be determined by this method. The corresponding number of samples shall be randomly selected from the batch of copper wire pieces.
Chemical or analytical
Test
GB/T 3952—1998
Table 8 Sampling method and sampling quantity
Other components
Electrical properties
Mechanical properties
Torsional properties
Surface quality and dimensional deviation
6.4.2 Preparation of samples for chemical composition analysis
Sampling method and sampling quantity
Take a sample every 5 rolls or every 20 t
Take a sample every 15 rolls or every 30 t
Take a sample every 15 rolls or every 30 t
Inspect each roll
For the preparation of samples for chemical composition analysis, the sample surface should be peeled off first, and the sample should be prepared into a sample by machining. Lubricants should not be used during the machining process, and the material should be kept from oxidation. Take equal amounts of the scraps made from each sample of the batch and combine them into a large sample. The total weight of the large sample shall not be less than 6008t. Mix the large sample thoroughly and use a magnet to remove the iron brought in during processing. Use the reduction method to divide it into four equal parts, one for the supplier, one for the buyer, one for arbitration analysis, and one for standby. 6.5 Determination of inspection results
If the chemical composition and electrical properties are unqualified, it will be judged as a defective product; if the mechanical properties, torsion characteristics, surface quality and dimensional deviation are unqualified, it will be judged as a defective product.
7 Quality certificate and marking, packaging, transportation and storage 7.1 Quality certificate
Each batch of copper wire should also be accompanied by a product quality certificate, indicating: a) manufacturer name;
b) product name;
c) product brand, status and specifications;
d) batch number;
e) net weight and number of pieces;
f) various inspection results and stamp of the technical supervision department;
h) date of publication.
7.2 Marking
Each roll of qualified wire should be labeled with the following contents: a) Manufacturer name;
h) Product trademark:
c) Product brand, status, specification:
d) Net weight;
e) Batch number:
f) Production phase II;
) Inspection stamp of the technical supervision department of the manufacturer. 7.3 Packaging
7.3.1 Copper wire should be packed in rolls and well tied. 7.3.2 Measures should be taken to prevent moisture, pollution and mechanical damage. 7.3.3 The packaging method may be stipulated by mutual agreement. 7.4
Transport and storage
GB/T3952—1998
During storage, handling and transportation, care should be taken to protect the copper wire from mechanical damage, moisture and corrosion of corrosive substances.
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