This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of special copper and copper alloy wires. This standard is applicable to cold-headed screws, rivets, valve cores, bicycle nut, ballpoint pen core and copper and copper alloy round wire for weaving mesh. GB/T 14956-1994 Special copper and copper alloy wires GB/T14956-1994 standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Special copper and copper alloy wires
Special copper and copper alloy wires 1 Subject content and scope of application
GB/T 14956-94
This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation, storage of special copper and copper alloy wires.
This standard applies to cold heading screws, rivets, valve cores, bicycle nut, ballpoint pen core and copper and copper alloy round wires for weaving mesh. 2 Reference standards
GB228 Metal tensile test method
GB 237
Metal forging flat test method
Metal wire repeated bending test method
Metal wire torsion test method
GB/T 5121
GB/T 5122
GB5231
GB5232
GB5233
GB 6397
Chemical analysis method for copperwwW.bzxz.Net
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
Chemical analysis method for tin bronze
GB/T 8002
Packaging, marking, transportation and storage of heavy non-ferrous metal processing productsGB 8888
GB/T 10567
Test method for residual stress of brass wire and rod by ammonia fumigation GB/T10573 Test method for tensile test of non-ferrous metal filaments 3 Product classification
3.1 Brand, state and specification
The brand, state and specification of the product shall comply with the provisions of Table 1. Note: 1) Replace GB2535---81, GB3115--3118--82, GB3128--82. Approved by the State Bureau of Technical Supervision on February 20, 1994 and implemented on December 1, 1994
T2, T3
HPb 62-0.8
HPb59-1
QSn 6. 5-0. 1
3.2 Marking Example
GB/T14956--94
Diameter, mm
Semi-hard (Y.)
Soft (M), Semi-hard (Y), 3/4 Hard (Y)) Semi-hard (Y)
Semi-hard (Y2)
Semi-hard (Y2)
Hard (Y)
Soft (M)
1. 0~ 6. 0
0. 03~~0. 07
For rivets, etc.
For rivets, valve cores, etc.
For cold heading nails and other fasteners
For bicycle bars and nuts, etc.
For ballpoint pen cores, valve cores, etc.
For weaving nets and braiding, etc.
The wire made of HPb59-1 alloy, in semi-hard state, with high precision and a diameter of 2.25mm is marked as: wire HPb 59-1Y2 high 2.25GB/T 14956--94 The wire made of HPb59-1 alloy, hard state, ordinary precision, and 2.5mm in diameter is marked as: wire HPb59-1Y2.5GB/T14956-94
4 Technical requirements
4.1 Chemical composition
The chemical composition of the wire shall comply with the provisions of GB5231, GB5232 and GB5233. 4.2 Size tolerance
4.2.1 The diameter tolerance of the wire shall comply with the provisions of Table 2. Table 2
Preferred size
Allowable deviation
Higher grade
Ordinary grade
0. 03~0. 035
0.03,0.035
>0. 035～ 0. 05
0.04,0.045
>0. 05～0. 07
0.06,0.07
Wires with other specifications and allowable deviations can be supplied upon agreement between the supplier and the buyer. 4.2.1.2 The wire deviation grade shall be indicated in the contract, otherwise it shall be supplied as ordinary grade. 4.2.1.3 When the buyer requires unidirectional deviation, its value shall be twice the value in Table 2. 1.0~~3.0
3. 0~6. 0
4.2.2 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 two-thirds of the allowable diameter deviation. 4.3 Mechanical properties
The room temperature tensile test results of the wire shall comply with the requirements of Table 3 and Table 4. 698
HPb 62-0. 8
HPb 59-1
QSn 6. 5-0. 1
4.4 Process properties
4.4.1 Forging test
Wire for rivets shall be subjected to forging test.
4.4.2 Repeated bending test
GB/T14956—94
1.0～3.0
>3.0~6.0
>3.0～6.0
2.0~3. 0
Preferred size
Tensile strength
≥370
390~470
440~540
390~570
370~540
390~540
390590
410～510
490~665
Maximum force
N(×10-2)
Not less than
Elongation
(L-- 100 mm)
Elongation
(Lo=100 mm）
Wire for cold heading nails should be subjected to repeated bending tests, with the number of bending times not less than 2 times, and no cracks should be generated at the bending points. 4.4.3 Torsion test
Bicycle rod mother wire should be subjected to torsion test, the number of torsion is not less than 4 times each, and no cracks are generated on the surface. 4.5 Residual stress
Except for copper and copper alloy wires used for rivets and mesh weaving, other wires should be heat treated to eliminate residual stress. 4.6 Wire fracture
The wire fracture should be dense, without shrinkage tail, pores, delamination and inclusions. 4.7 Surface quality
4.7.1 The wire surface should be smooth and clean, and no cracks, peeling, burrs, rough drawing, folding and inclusions are allowed. 4.7.2 The wire surface is allowed to have slight, localized indentations and scratches that do not cause the wire diameter to exceed its allowable deviation. 699
GB/T 14956--94
The slight redness, darkening and oxidation color on the surface of the wire and slight local water and oil stains are not considered as scrapping. 4.8 Wire reel (spool) weight
4.8.1 Tin bronze wire for weaving and braiding
4.8.1.1 The weight of the spool shall comply with the provisions of Table 5. Table 5
Diameter, mm
Minimum weight basis, g
0. 03~~0. 035
4.8.1.2 Each axis shall be wound with one wire evenly. >0. 035～0. 045
4.8.1.3 The difference between the shaft end diameter and the winding diameter shall be greater than or equal to 4mm. 4.8.2 Other copper and copper alloy wires
4.8.2.1 The weight of the wire roll (spool) shall comply with the provisions of Table 6. Table 6
Wire diameter
>3. 0~～6. 0
4.8.2.2 The permitted delivery weight of each batch is not more than 10% of the lighter roll (spool). 5
Test method
5.1 Chemical analysis arbitration analysis method
Weight of each roll (spool), kg, not less than
>0. 045 ~- 0. 07
The arbitration analysis method for the chemical composition of lighter rolls
Wires shall be carried out in accordance with GB/T5121, GB/T5122 and GB/T8002. 5.2 Mechanical property test method
The room temperature tensile test of wires shall be carried out in accordance with GB228 and GB/T10573. 5.3 Process performance test method
5.3.1 The forging test of wire shall be carried out in accordance with GB237. 5.3.2 The repeated bending test of wire shall be carried out in accordance with GB238. 5.3.3 The torsion test of wire shall be carried out in accordance with GB239. 5.4 Dimension measurement method
The outer dimensions of the wire shall be measured with measuring tools of corresponding accuracy. 5.5 Surface quality inspection method
The surface quality of the wire shall be visually inspected.
5.6 Residual stress inspection method
The residual stress inspection of the wire shall be carried out in accordance with GB/T10567. 6 Inspection rules
6.1 Inspection and acceptance
6.1.1 The wire shall be inspected by the supplier's technical supervision department to ensure that the product quality meets the requirements of the standard and fill in the quality certificate. 6.1.2 The purchaser 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 purchaser shall submit the matter to the supplier within 3 months from the date of receipt of the product and the supply and demand parties shall negotiate to resolve the issue. 6.2 Batches
Wires shall be submitted for inspection in batches, and each batch shall consist of the same:-brand, state and specification. The weight of each batch shall not be less than 500kg. 700
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