This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of pure copper wire. GB/T 14953-1994 Pure Copper Wire GB/T14953-1994 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Pure copper wire
Copper wires
Subject content and scope of application
GB/T 14953---94
Generation # 30
This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of pure copper wire. Reference standards
GB 238
Metal tensile test method
Metal wire repeated bending test method
GB/T 3248
GB/T 5121
GB 5231
GB 6397
GB 8888
Determination of resistivity of copper, nickel and their alloysChemical analysis of copper
Chemical composition and product shape of processed copper
Metal tensile test specimens
Packaging, marking, transportation and storage of heavy non-ferrous metal processed productsTensile test method for non-ferrous metal filaments
GB/T 10573
YB 731
3 Product classification
Metallographic examination of oxygen content of oxygen-free copper for vacuum devices3.1 Brand, state and specification
The brand, state and specification of the product shall comply with the provisions of Table 1. 1
3.2 Marking example
Soft (M), Hard (Y)
Soft (M), Hard (Y)
Wire made of T2, hard state, higher precision, 1.0mm diameter, marked as: wire T2Y higher grade 1.0GB/T14953-.94
4 Technical requirements
4.1 Chemical composition
The chemical composition of the wire shall comply with the provisions of GB5231. 4.2 Dimensions and allowable deviations
4.2.1.1 The wire diameter and allowable deviation shall comply with the provisions of Table 2. Approved by the State Bureau of Technical Supervision on February 20, 1994 682
Diameter, mm
0. 02 ~~6. 0
199412-01 implementation
Higher grade
Allowable deviation (±)
4. 2. 1. 2
Ordinary grade
0. 02~~0.10
GB/T14953-94
20. 10~0. 50
>0.50~[. 0
When the purchaser requires unidirectional deviation, the allowable deviation is twice the value in the table. Wires with other specifications and allowable deviations can be supplied by agreement between the supply and demand parties. 4.2.1.4 The deviation grade of the wire must be indicated in the contract, otherwise it shall be supplied as ordinary grade. 4.2.2 Out-of-roundness
21. 0~3. 0
When the wire diameter is less than or equal to 3.0mm, its out-of-roundness shall not exceed half of the allowable diameter deviation. When the wire diameter is greater than 3.0mm, its out-of-roundness shall not exceed the allowable diameter deviation. 4.3 Mechanical properties
The room temperature tensile test results of the wire shall comply with the provisions of Table 3. Table 3
T2, T3
4.4 Process performance
>0. 3～1. 0
>1. 0～2. 5
2. 5～6. 0
0. 1 ~~2. 5
>2.5～4.0
≥4.0~6.0
Tsile strength, N/mm2
>3. 0~- 6. 0
Elongation 8.%, (1,100mm)
not less than
Tul and Tu2 wires with a diameter greater than or equal to 0.3mm should be subjected to repeated bending tests after hydrogen annealing, and the number of bending times shall be not less than 10 times.
4.5 Electrical properties
The resistivity of T2 wire at 20C shall comply with the provisions of Table 4. Table 4
Material state
Soft (M)
Hard (Y)
Note: This test shall be carried out only after it is specified in the contract. 4.6 Oxygen content
Resistivity μ, Qmm/m
GB/T 14953—94
Oxygen-free copper wire shall be tested for oxygen content in accordance with the provisions of YB731. According to the standard picture, grades 1 and 2 are qualified, and grades above 2 are unqualified. 4.7 Wire fracture
The wire fracture shall be dense, without shrinkage, delamination, pores and inclusions. 4.8 Surface quality
4.8.1 The surface of the wire shall be smooth and clean, and cracks, peeling, thorns, rough drawing, folding and inclusions are not allowed. 4.8.2 The wire surface is allowed to have slight, local defects such as pressed objects and scratches that do not make the wire head diameter exceed its allowable deviation. Slight redness, darkening and oxidation color and slight, local water and oil marks on the wire surface shall not be used as a basis for scrapping. 4.9 Weight of wire coils (spools)
4.9.1 The weight of wire coils (spools) shall comply with the provisions of Table 5. Table 5
Wire diameter
0.02~0.10
>0. 10~0. 50
≥0.50~1.0
1. 0~ 3. 0
>3. 0~6. 0
Standard coils
4.9.2 Each batch of permitted delivery weight shall not exceed 10% of the lighter coils (spools). 5 Test methods
5.1 Chemical composition arbitration analysis method
The chemical composition arbitration analysis of wires shall be carried out in accordance with GB/I5121. 5.2 Mechanical properties test method
The weight of each roll (axis), kg shall not be less than
The room temperature tensile test of the lighter roll
wire shall be carried out in accordance with GB228 and GB/T10573. 5.3 Process performance test method
The repeated bending test of oxygen-free copper wire shall be carried out in accordance with GB238. 5.4 Oxygen content test method
The oxygen content test of oxygen-free copper wire shall be carried out in accordance with YB731. 5.5 Electrical properties test method
The resistivity test of wires shall be carried out in accordance with GB/T3248. 5.6 Dimension measurement method
The outer dimensions of the wires shall be measured with measuring tools of corresponding accuracy. 5.7 Surface quality test method
The surface quality of the wires shall be visually inspected.
6 Inspection ruleswwW.bzxz.Net
6.1 Inspection and acceptance
GB/T 14953-94
6.1.1 The wires shall be inspected by the supplier's technical supervision department to ensure that the product quality meets the requirements of this standard. And fill in the quality certificate. 6.1.2 The buyer shall inspect the received products in accordance with the provisions of this standard. If the inspection results do not meet the requirements of this standard, the buyer shall report to the supplier within 3 months from the date of receipt of the product, and the supplier and buyer shall negotiate to resolve the problem. 6.2 Batches
Wires shall be submitted for inspection in batches. Each batch shall consist of the same brand, state and specification, and the weight of each batch shall not exceed 500kg. 6.3 Inspection items
6.3.1 Each batch of wires shall be inspected for chemical composition, external dimensions and surface quality. 6.3.2 Each batch of Tul and Tu2 wires shall be inspected for oxygen content and repeated bending tests. 6.3.3 Each batch of T2 and T3 wires shall be tested for room temperature mechanical properties. 6.3.4 T2 wires shall be tested for resistivity at 20°C as required by the contract. 6.3.5 The supplier may not conduct wire fracture inspection, but must ensure it. 6.4 Sampling location and sampling quantity
6.4.1 For sampling of chemical composition, the supplier shall take 1 sample from each furnace during melting and casting, and the buyer shall take 1 sample from each batch of wires. 6.4.2 For the case temperature tensile test, 2 rolls (spools) shall be randomly selected from each batch of wires, and 1 sample shall be taken from each roll (spool). The sample shall comply with the provisions of GB6397, and the sample number is R17. 6.4.3 For the repeated bending test, 2 rolls (spools) shall be randomly selected from each batch of wires, and 1 sample shall be taken from each roll (spool). 6.4.4 For the resistivity test, 2 rolls (spools) shall be randomly selected from each batch of wires, and 1 sample shall be taken from each roll (spool). 6.4.5 The oxygen content test shall be carried out by randomly selecting 2 rolls (spools) from each batch of wires, and taking 1 sample from each roll (spool). 6.4.6 The measurement of the external dimensions and the inspection of the surface quality shall be carried out roll by roll (spool). 6.5 Repeated test
Even if only one sample fails the test result, double samples shall be taken from the batch to retest the unqualified item. If one sample still fails the retest result, the whole batch shall be scrapped or tested roll by roll (spool). The qualified ones shall be accepted in a separate batch. 7 Marking, packaging, transportation, storage
The marking, packaging, transportation and storage of wires shall be carried out in accordance with the provisions of GB8888. Additional remarks:
This standard was proposed by China Nonferrous Metals Industry Corporation. This standard was drafted by Luoyang Copper Processing Plant. The main drafters of this standard are Zhong Weijia, Liu Guiying and Chen Guiyuan.
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