GB/T 27671-2023 PDF EnglishUS$320.00 · In stock · Download in 9 seconds
GB/T 27671-2023: Copper profiles for electrical purposes 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 27671: Historical versions
Similar standardsGB/T 27671-2023: Copper profiles for electrical purposes---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/GBT27671-2023GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 77.150.30 CCS H 62 GB/T 27671-2023 Replacing GB/T 27671-2011 Copper profiles for electrical purposes Issued on. MAY 23, 2023 Implemented on. DECEMBER 01, 2023 Issued by. State Administration for Market Regulation; Standardization Administration of the People’s Republic of China. Table of ContentsForeword... 3 1 Scope... 5 2 Normative references... 5 3 Terms and definitions... 6 4 Classification and marking... 7 5 Technical requirements... 10 6 Test methods... 19 7 Inspection rules... 20 8 Marking, packaging, transportation, storage and accompanying documents... 22 9 Order form contents... 23 Annex A (informative) Conversion relationship between volume resistivity (resistivity) and electrical conductivity and conductivity... 25 Bibliography... 271 ScopeThis document specifies the classification and marking, technical requirements, test methods, inspection rules and marking, packaging, transportation, storage and accompanying documents and order form contents of copper profiles for electrical purposes (hereinafter referred to as “profiles”). This document applies to copper profiles for electrical purposes, with a circumscribed circle diameter not exceeding 180 mm.2 Normative referencesThe following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 231.1 Metallic materials - Brinell hardness test - Part 1.Test method 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 3048.2 Test methods for electrical properties of electric cables and wires - Part 2.Test of electrical resistivity of metallic materials 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 Terms and definitionsFor the purpose of this document, the following terms and definitions apply. 3.1 coiled A whole piece of profile wound into a series of adjacent coils. 3.2 pancake A single-layer profile wound into a disc shape by spiral winding, a coiled profile shaped like a mosquito-repellent coil. 3.3 traverse wound A coiled profile with each turn wound into a layer parallel to the coiled profile, so that the adjacent turns in any layer are close to each other. 3.5 on spools A shaft made of steel, wood, plastic and other materials, on which the profile is regularly wound layer by layer in a certain winding direction.4 Classification and marking4.1 Product classification 4.1.1 The classification, designation, code, state and supply form of profiles shall comply with the provisions of Table 1. 4.2 Product marking Profile marking is indicated in the order of product name, serial number of this document, designation (or code), state, length and drawing number. Straight-strip profiles are directly marked with length dimensions. The marking examples are as follows.5 Technical requirements5.1 Chemical composition The chemical composition of TAg0.04, TAg0.07, TAg0.04-0.004, TAg0.07-0.004, TAg0.1-0.004 profiles shall comply with the provisions of Table 3, and the chemical composition of profiles of other designations shall comply with the corresponding provisions in GB/T 5231. 5.2 Dimensions and their allowable deviations 5.2.1 Dimensions of cross section 5.2.1.1 The allowable deviation of dimensions of the cross section of profiles in M30 state shall be agreed by the supplier and purchaser. 5.2.4 Fillet radius of edges and corners The maximum fillet radius of edges and corners of profiles shall comply with the provisions of Table 9. 5.2.6 Length Both ends of profiles shall be sawed flat. The irregular length of straight-strip profiles is 500 mm ~ 8500 mm, the fixed length or multiple length shall be within the irregular length range, and the allowable deviation of fixed length or multiple length shall comply with the provisions of Table 11. 5.2.7 Cutting bevel Under the condition that the allowable deviation of fixed length is not exceeded, the cutting bevel of the end face of a profile shall not be greater than 1.5 % of the larger value of the maximum width (Wmax) or the maximum height (hmax) of the profile. 5.2.8 Geometric tolerance 5.4 Electrical properties The electrical properties of profiles at 20 °C shall comply with the requirements of Table 14.6 Test methods6.1 Chemical composition The chemical composition analysis method for profiles shall be carried out in accordance with the provisions of GB/T 5121 (all parts) and YS/T 482.The arbitration test method shall be carried out in accordance with the provisions of GB/T 5121 (all parts). 6.2 Dimensions and their allowable deviations 6.3.2 Hardness test The Brinell hardness test method for profiles shall be carried out in accordance with the provisions of GB/T 231.1; the Vickers hardness test method for profiles shall be carried out in accordance with the provisions of GB/T 4340.1. 6.4 Electrical properties The test method for electrical properties of profiles shall be carried out in accordance with the provisions of GB/T 3048.2 and GB/T 32791, the arbitration test method shall be carried out in accordance with the provisions of GB/T 3048.2, and the electrical conductivity corresponding to the resistivity is shown in Annex A. The electrical properties test pieces shall be processed into samples that meet the requirements of GB/T 3048.2. 6.5 Hydrogen embrittlement test The hydrogen embrittlement test method for profiles shall be carried out in accordance with the provisions of GB/T 23606.7 Inspection rules7.1 Inspection and acceptance 7.1.1 Profiles shall be inspected by the supplier or a third party to ensure that the product quality meets the requirements of this document and the order form. 7.2 Batch grouping Profiles shall be submitted for inspection in batches. Each batch shall consist of profiles of the same designation, state, specification or drawing number. The mass of each batch shall not exceed 2000 kg. 7.3 Inspection items The inspection items of profiles are divided into factory-exit inspection items and type inspection items, see Table 16.Type inspection shall be carried out in any of the following situations. 7.4 Sampling The sampling of profiles shall comply with the provisions of Table 17.The sampling method shall be carried out in accordance with the provisions of YS/T 668. 7.5 Determination of test results 7.5.1 The numerical value of the test results shall be rounded off according to the provisions of GB/T 8170, and the rounded value comparison method shall be used for determination. 7.5.2 When the chemical composition is unqualified, the batch of profiles is determined to be unqualified. 7.5.3 When the dimensions and their allowable deviations and surface quality of the profile are unqualified, the piece or the coil is determined to be unqualified. When the number of unqualified pieces in each batch exceeds the acceptance quality limit, the entire batch is determined to be unqualified, and the supplier shall inspect each piece or coil, and determine piece by piece or coil by coil.8 Marking, packaging, transportation, storage andaccompanying documents 8.1 Marking, packaging, transportation, storage The marking, packaging, transportation and storage of profiles shall comply with the provisions of GB/T 8888. 8.2 Accompanying documents Each batch of products shall be accompanied by accompanying documents, which shall include supplier information, product information, serial number of this document, factory-exit date or packaging date, and should hall also include.9 Order form contentsThe order form for the materials listed in this document shall include the following contents. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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