GB/T 21652-2017 PDF EnglishUS$265.00 · In stock · Download in 9 seconds
GB/T 21652-2017: Copper and copper alloy wire Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 21652: Historical versions
Similar standardsGB/T 21652-2017: Copper and copper alloy wire---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT21652-2017GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 77.150.30 H 62 Replacing GB/T 21652-2008 Copper and copper alloy wire Issued on. MAY 31, 2017 Implemented on. DECEMBER 01, 2017 Issued by. General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration of the People’s Republic of China. Table of ContentsForeword... 3 1 Scope... 5 2 Normative references... 5 3 Requirements... 6 4 Test methods... 24 5 Inspection rules... 26 6 Marking, packaging, transportation, storage and quality certificate... 28 7 Order form (or contract) contents... 291 ScopeThis Standard specifies the requirements, test methods, inspection rules, marking, packaging, transportation, storage, quality certificate and order form (or contract) for copper and copper alloy wires. This Standard applies to round, square, regular hexagonal copper and copper alloy wires (hereinafter referred to as wires) for general purposes.2 Normative referencesThe following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies to this document. For undated references, the latest edition (including any amendment) applies to this document. GB/T 228.1-2010, Metallic materials - Tensile testing - Part 1.Method of test at room temperature GB/T 230.1, Metallic materials - Rockwell hardness test - Part 1.Test method (scales A, B, C, D, E, F, G, H, K, N, T) GB/T 231.1, Metallic materials - Brinell hardness test - Part 1.Test method GB/T 238, Metallic materials - Wire - Reverse bend test GB/T 239.1, Metallic materials - Wire - Part 1.Simple torsion test GB/T 239.2, Metallic materials - Wire - Part 2.Reverse 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, Metallic materials - Wire - Wrapping test GB/T 4340.1, Metallic materials - Vickers hardness test. Part 1.Test method GB/T 5121 (all parts), Methods for chemical analysis of copper and copper alloys GB/T 5231, Designation and chemical composition of wrought copper and copper alloys3 Requirements3.1 Product classification 3.2 Chemical composition The chemical composition of each designation of the wire shall comply with the provisions of GB/T 5231. 3.3 External dimensions and their allowable deviation 3.4 Mechanical properties 3.4.1 The tensile strength at room temperature and the elongation after fracture of the wire shall meet the requirements in Table 4. 3.7 Torsion test Wires can be subjected to the torsion test, where the requirements shall be negotiated between the supplier and the buyer. 3.8 Wrapping test The silicon bronze and tin bronze wires used as springs shall be subjected to a wrapping test, where they shall be wound 10 times on a cylinder twice the diameter of the wire without cracking. 3.9 Residual stress 3.10 Fracture inspection The fracture of the wire shall be dense, without shrinkage, while slight defects that do not affect the use are allowed. The size and quantity of the defects shall comply with the provisions of YS/T 336. 3.11 Grain size Wires can be tested for grain size, where the requirements shall be negotiated between the supplier and the buyer. 3.12 Surface quality The surface of the wire shall be smooth and clean, and there shall be no defects that affect its use. 3.13 Coil weight4 Test methods4.1 Chemical composition The chemical composition analysis method of the wire shall be carried out according to the provisions of GB/T 5121 (all parts), YS/T 482 or YS/T 483, and the arbitration shall be carried out according to the provisions of GB/T 5121 (all parts). 4.2 Dimensions and their allowable deviation The measurement method of the outer dimension of the wire shall be carried out in accordance with the provisions of GB/T 26303.2. 4.3 Mechanical properties 4.4 Hydrogen embrittlement test The hydrogen embrittlement test method of the wire shall be carried out according to the provisions of GB/T 23606 for closed bending test method. 4.5 Reverse bend test The reverse bend test method of the wire shall be carried out according to the provisions of GB/T 238. 4.8 Residual stress The residual stress test method of the wire shall be carried out according to the provisions of GB/T 10567.2. 4.9 Fracture The fracture test method of the wire with diameter (or distance across sides) ≥ 5.0 mm shall be carried out according to the provisions of YS/T 336, and the fracture of the wire with diameter (or distance across sides) < 5.0 mm shall be sampled and inspected at the wire blank. 4.10 Grain size The grain size test method of the wire shall be carried out according to the provisions of YS/T 347. 4.11 Surface quality The surface quality of the wire shall be inspected visually.5 Inspection rules5.1 Inspection and acceptance 5.1.1 The wire shall be inspected by the technical supervision department of the supplier to ensure that the product quality complies with the provisions of this Standard and the order form (or contract); the quality certificate shall be filled. 5.2 Batch Wires shall be submitted in batches. Each batch shall consist of products of the same designation, state and specification, and the weight of each batch shall not exceed 1 500 kg. 5.3 Inspection items 5.3.1 Each batch of wires shall be inspected for chemical composition, external dimensions and deviation, tensile strength and elongation after fracture, fracture, surface quality and coil weight. 5.3.6 When required by the buyer, each batch of wires shall also be inspected for hardness, torsion test, and grain size. 5.4 Sampling The sampling of the wires shall comply with the requirements in Table 7.The sampling method shall be carried out in accordance with the provisions of YS/T 668, and the preparation of samples for mechanical properties shall be carried out in accordance with the provisions of YS/T 815. 5.5 Determination of the test result 5.5.1 When the chemical composition is unqualified, judge the batch of wires as unqualified. 5.5.2 When the external dimension of the wire and its allowable deviation and surface quality are unqualified, judge the coil as unqualified. When the number of unqualified pieces in each batch exceeds the acceptance quality limit, judge the whole batch as unqualified; alternatively, the supplier shall inspect coil by coil, and deliver the qualified ones.6 Marking, packaging, transportation, storage and quality certificateThe marking, packaging, transportation, storage and quality certificate of the wire shall be in accordance with the provisions of GB/T 8888.7 Order form (or contract) contentsThe order form (or contract) for the materials which are listed in this Standard shall include the following. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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