This standard specifies the requirements, test methods, inspection rules, marking, packing, transportation and storage as well as order (or contract) for copper and copper alloy wire.
This standard is applicable to the copper and copper alloy wire in round, square and regular hexagonal shapes for different industry departments.
2 Normative References
The following documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated reference, subsequent correctionments to, or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest edition of these documents is applicable. For undated references, the latest edition of the normative document is applicable to this standard.
GB/T 228 "Metallic Materials-Tensile Testing at Ambient Temperature"
GB/T 230.1 "Metallic Materials—Rockwell Hardness Test Part 1: Test Method"
GB/T 231.1 "Metallic Materials--Brinell Hardness Test--Part 1:Test Method"
GB/T 238 "Metallic materials--Wire--Reverse Bend Test"
GB/T 239 "Metallic Materials Wire Torsion Test"
GB/T 2828.1 "Sampling Procedures for Inspection by Attributes-Part 1: Sampling Schemes Indexed by Acceptance Quality Limit (AQL) for Lot-by-lot Inspection"
GB/T 2976 "Metalic Materials--Wire--Wrapping Test"
GB/T 4340.1 "Metallic Materials--Vickers Hardness Test-Part 1: Test Method"
GB/T 5121(All the parts) "Methods for Chemical Analysis of Copper and Copper Alloys"
GB/T 5231 "Wrought Copper and Copper Alloys Chemical Composition Limits and Forms of Wrought Products"
GB/T 8888 "Wrought Heavy Non-ferrous Metal Products-Packing, Marking, Transporting and Storing"
GB/T 10119 "Determination of Dezincification Corrosion Resistance of Brass"
GB/T 10567.2 "Wrought Copper and Copper Alloys-Detection of Residual Stress-Ammonia Test"
GB/T 10573 "Tensile Testing Method for Fine Wire of Non-ferrous Metals"
YS/T 336 "Method of Fracture Test for Tube and Rod of Copper and Copper Alloys, Nickel and Nickel alloys,"
3 Requirements
3.1 Product classification
3.1.1 Designation, state and specification
The designation, state and specification of products shall be in accordance with those specified in Table 1.
3.1.2 Marking illustration
The product marks shall be expressed according to product name, designation, state, precision, specification and standard number sequence. The mark illustration is listed as follows:
Example 1: Round wire made of BZn 40-20 alloy, in 1/4 hard state, of higher precision and with a diameter of 3mm shall be marked as:
Round copper wire BZn 40-20Y 1 higher 3.0 GB/T 21652-2008
Example 2: Square wire made of BZn 12-26 alloy, in semi-hard state, of general precision and with a distance across flat of 4.5 mm shall be marked as:
Square copper wire BZn 12-26 Y 2 general 4.5 GB/T 21552-2008
Example 3: Regular hexagonal wire made of HSb 60-0.9 alloy, in hard state, of higher precision and with a distance across flat of 5mm shall be marked as:
Hexagonal copper wire HSb 50-0.9 Y higher 5 GB/T 21652-2008
3.2 Chemical composition
3.2.1 Chemical compositions on each designation of wire shall be in accordance with those specified in GB/T 5231.
3.2.2 The chemical composition of alloy designation beyond the scope of GB/T 5231 shall be in accordance with those specified in Table 2 to Table 7.
