This standard specifies the product classification, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of pure copper, brass and bronze flat wires. This standard is applicable to pure copper, brass and bronze flat wires used in various industrial sectors. GB/T 3114-1994 Copper and copper alloy flat wire GB/T3114-1994 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Copper and copper alloy rectangular wires
Copper and copper alloy rectangular wires1Subject content and scope of application
GB/T 3114 -- 94
Replaces GB311482
This standard specifies the product classification, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of pure copper, brass and bronze rectangular wires.
This standard applies to pure copper, brass and bronze rectangular wires used in various industrial sectors. 2 Reference standards
GB228 Metal tensile test method
Method for repeated bending test of metal wire
Chemical analysis method for copper
GB/T 5121
GB/T 5122
GB5231
GB 5232
GB5233
GB 6397
Chemical analysis method for brass
Chemical composition and product shape of processed copper
Chemical composition and product shape of processed brass
Chemical composition and product shape of processed bronze
Metal tensile test specimen
GB/T 6520
GB/T 8002
Chemical analysis methods for silicon bronze and silicon brass
Chemical analysis methods for tin bronze
Packaging, marking, transportation and storage of heavy non-ferrous metal processing productsGB 8888
3 Product classification
3.1 Brand, state and specification
The brand, state and specification of the product shall comply with the requirements of Table 1. Table 1
H62,H65,H68
QSn 6. 5-0. 1,QSn 6. 5-0. 4
QSn 4-3.QSi 3-1
Soft (M), Hard (Y)
Soft (M), Semi-hard (Y2), Hard (Y)
Soft (M), Semi-hard (Y), Hard (Y)
Hard (Y)
Note: The thickness ratio of the flat wire is less than or equal to 1:7, but other specifications of flat wire can be supplied by agreement between the two parties. 3.2 Marking example
Specification (thickness × width)
0. 5~6. 0X 0. 5~-15. 0
0. 5~~6. 0× 0. 5~ 12. 0
0. 5~6. 0× 0. 5~~12. 0
0. 5~6. 0× 0. 5~12. 0
Drawn from T2, with a thickness of 1.02mm and a width of 4mm, high precision soft wire, marked as; flat wire T2M high 1.02X×4GB/T3114--94 Approved by the State Bureau of Technical Supervision on 1994-02-20mm
Implemented on 1994-12-01
4 Technical requirements
4.1 Chemical composition
GB/T 3114 --- 94
The chemical composition of the wire shall comply with the provisions of GB5231, GB5232 and GB5233. 4.2 Size tolerance
4.2.1 The wire specifications and tolerances shall comply with the provisions of Table 2. Table 2
QSn 6. 5-0. 1
QSn 6. 5-0. 1
QSn 4-3
QSi 3-1
(distance across flats)
>1.0~3. 0
>3.0～6.0
>6. 0~～10. 0
>1. 0~3. 0
>3. 0～6. 0
>6. 0~10. 0
4.2.2 The deviation grade of flat wire shall be indicated in the contract, otherwise it shall be supplied as ordinary grade. Ordinary grade
Allowable deviation (±)
4.2.3 Flat wires shall not be twisted, and the one-way tolerance of the thickness of flat wires shall not exceed the value of the allowable deviation. 4.2.4 When the purchaser requires unidirectional deviation, its value shall be twice the value in Table 2. 4.2.5 Side curvature
The side curvature of the wire measured from 2m away from the wire end shall comply with the provisions of Table 3. Table 3
Flat wire width
0.5~~5. 0
3 Mechanical properties
The room temperature tensile test results of the wire shall comply with the provisions of Table 4. Table 4
(Distance across flats)
0. 5 ~15. 0
0. 5~12. 0
0.5-~12.0
0.5~~12.0
Side curvature
Not more than
Tensile strength oh
Higher gradewww.bzxz.net
Elongation 5%, (1-100mm)
Not less than
QSn6.5-0.1
QSn 6. 5-0. 1
GB/T 3114--94
Continued Table 4
(Distance across flats)
0.5~~12. 0
0. 5~~12. 0
0.5～12. 0
0. 5~~12. 0
Note: Flat wires with other mechanical properties can be provided through double force agreement. 4.4 Process performance
Tensile strength α
Elongation, %, L-100 mm)
Not less than
Semi-hard wire and hard wire should be subjected to repeated bending tests, semi-hard wire not less than 3 times, hard wire not less than 2 times. 4.5 Wire fracture
Wire fracture II should be dense, without shrinkage tail, hole, delamination and inclusions 4.6 Surface quality
4.6.1 The surface of the wire should be smooth and clean, and cracks, peeling, thorns, rough drawing, folding and inclusions are not allowed. 4.6.2 The surface of the wire is allowed to have slight, local indentations and scratches that do not cause the wire size to exceed the deviation. Slight redness, darkening and oxidation color and slight local water and oil stains are not considered as scrapping basis. 4.7 Wire coil (spool) weight
4.7.1 Wire coil (spool) weight shall comply with the provisions of Table 5. Table 5
Flat wire width
0. 5~5. 0
Standard coil
4.7.2 Each batch of permitted delivery weight shall not be less than 10% of the lighter wire coil (spool). Test method
Chemical composition arbitration analysis method
The maximum weight of each coil, kg shall not be less than
Lighter coil
Chemical composition arbitration analysis shall be carried out in accordance with GB/T5121, GB/T5122, GB/T6520 and GB/T8002. 5.2 Mechanical property test method
Room temperature tensile test of flat wire shall be carried out in accordance with the provisions of GB228. 5.3T.Technical performance inspection method
The room temperature repeated bending test of flat wire shall be carried out in accordance with the provisions of GB238. 5.4Dimension measurement method
The outer dimensions of the wire shall be measured with measuring tools of corresponding accuracy. 5.5Surface quality inspection method
The surface quality of the wire shall be visually inspected.
6Inspection rules
6.1Inspection
GB/T3114—94
6.1.1The wire shall be inspected by the supplier's technical supervision department to ensure that the product quality complies with the provisions of this standard and fill in the quality assurance certificate. 6.1.2The buyer shall inspect the received products in accordance with the provisions of this standard. If the inspection results do not comply with the provisions of this standard, the buyer shall submit the matter to the supplier within 3 months from the date of receipt of the product, and the supplier and buyer shall negotiate to resolve the issue. 6.2Batch
Wire shall be submitted for inspection in batches. Each batch shall consist of the same brand, specification and state, 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, dimensions, mechanical properties and surface quality. 6.3.2 Each batch of hard and semi-hard wires shall be subjected to repeated bending tests. 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 the melting and casting process, and the buyer shall take 1 sample from each batch of wires at random. 6.4.2 For room temperature tensile test, 2 rolls (axles) of wire shall be taken from each batch, and 1 sample shall be taken from each roll (axle) at 1m away from the wire end. The sample shall comply with the provisions of GB6397, and the sample number is R17.
6.4.3 For repeated bending tests, 2 rolls (axles) of wire shall be taken from each batch, and 1 sample shall be taken from each roll (axle) at 1m away from the wire end. 6.4.4 The supplier may not conduct wire fracture test, but must ensure. 6.4.5 The measurement of the overall dimensions and the inspection of the surface quality shall be carried out roll by roll (axis).5 Repeated test
If even one sample fails the test result, double the number of samples should be taken from the batch to retest the failed item. If even one sample fails the retest result, the whole batch shall be scrapped or inspected roll by roll. The qualified ones shall be accepted in a separate batch. 7 Marking, packaging, transportation and storage
Marking, packaging, transportation and storage 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 Shanghai Nonferrous Alloy Wire Factory. The main drafters of this standard are Zhao Jinqing, Mao Shaojun and Hu Xiaofang. 662
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