GB/T 27671-2023 PDF English
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| GB/T 27671-2023 | English | 320 |
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Copper profiles for electrical purposes
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| GB/T 27671-2011 | English | 280 |
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Copper profiles for electrical purposes
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GB/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/GBT27671-2023
GB
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 Contents
Foreword... 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... 27
1 Scope
This 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 references
The 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
alloys
3 Terms and definitions
For 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 marking
4.1 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 requirements
5.1 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 methods
6.1 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 rules
7.1 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 and
accompanying 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 contents
The 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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