GB/T 27671-2023 English PDF (GB/T27671-2023)

GB/T 27671-2023: Copper profiles for electrical purposes
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GB/T 27671-2023
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
Copper profiles for electrical purposes
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
GB/T 8170 Rules of rounding off for numerical values and expression and judgement
of limiting values
GB/T 8888 Wrought heavy non-ferrous metal products - Packing, marking,
transportation, storing and certificate of quality
GB/T 23606 Copper-hydrogen embrittlement test method
GB/T 26303.2 Measuring methods for dimensions and shapes of wrought copper
and copper alloy - Part 2.Rod, wire and profile
5.7 Surface quality
The surface of profiles shall be clean and shall not have harmful defects and joints that
affect use. If no special requirements are specified on the order form or drawing,
discoloration that does not affect use is allowed.
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
6.2.1 The dimensions of profiles shall be tested with measuring tools of corresponding
accuracy.
6.2.2 The dimension testing method for profiles shall be carried out in accordance with
the provisions of GB/T 26303.2.
6.3 Mechanical properties
6.3.1 Room temperature tensile test
The room temperature tensile test method for profiles shall be carried out in accordance
with the provisions of GB/T 34505, and the tensile test pieces shall comply with the
provisions of GB/T 34505.
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.
6.6 Internal quality
The internal quality inspection method for profiles can refer to the provisions of YS/T
336 or be determined by the agreement between the supplier and purchaser.
6.7 Surface quality
The surface quality of profiles is visually inspected.
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.
7.1.2 The purchaser shall inspect the received products in accordance with the
provisions of this document. If the inspection results do not meet the requirements of
this document or the order form, it shall be reported to the supplier and resolved by the
agreement between the supplier and purchaser. Objections to surface quality,
dimensions and their allowable deviations shall be raised within 1 month from the date
of receipt of products; other objections shall be raised within 3 months from the date of
receipt of products. If arbitration is required, it shall be determined by the agreement
between the supplier and purchaser.
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.
a) trial modeling and identification of new products or old products when transferred
to other factories;
b) when the raw materials and processes of the product have changed significantly,
which may affect the product performance;
c) when the production of the product is resumed after suspended;
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.
a) Product quality guarantee, the contents of which are as follows.
1) main performance and technical parameters of the product;
2) product characteristics (including manufacturing process and raw material
characteristics);
3) responsibility for product quality;
4) quality certification obtained by the product and various analysis and test
results with the seal of the supplier’s technical supervision department.
b) Product certificate, the contents of which are as follows.
1) inspection items and their results or inspection conclusions;
2) batch number;
3) inspection date;
4) signature or seal of the inspector.
c) Inspection report during product quality control and finished product inspection
report.
d) Product instructions. correct handling, use, storage methods, etc.
e) Others.
9 Order form contents
The order form for the materials listed in this document shall include the following
contents.
a) product name;
b) designation;
c) specification;
d) state;
e) drawing number;
GB/T 27671-2023
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
Copper profiles for electrical purposes
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
GB/T 8170 Rules of rounding off for numerical values and expression and judgement
of limiting values
GB/T 8888 Wrought heavy non-ferrous metal products - Packing, marking,
transportation, storing and certificate of quality
GB/T 23606 Copper-hydrogen embrittlement test method
GB/T 26303.2 Measuring methods for dimensions and shapes of wrought copper
and copper alloy - Part 2.Rod, wire and profile
5.7 Surface quality
The surface of profiles shall be clean and shall not have harmful defects and joints that
affect use. If no special requirements are specified on the order form or drawing,
discoloration that does not affect use is allowed.
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
6.2.1 The dimensions of profiles shall be tested with measuring tools of corresponding
accuracy.
6.2.2 The dimension testing method for profiles shall be carried out in accordance with
the provisions of GB/T 26303.2.
6.3 Mechanical properties
6.3.1 Room temperature tensile test
The room temperature tensile test method for profiles shall be carried out in accordance
with the provisions of GB/T 34505, and the tensile test pieces shall comply with the
provisions of GB/T 34505.
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.
6.6 Internal quality
The internal quality inspection method for profiles can refer to the provisions of YS/T
336 or be determined by the agreement between the supplier and purchaser.
6.7 Surface quality
The surface quality of profiles is visually inspected.
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.
7.1.2 The purchaser shall inspect the received products in accordance with the
provisions of this document. If the inspection results do not meet the requirements of
this document or the order form, it shall be reported to the supplier and resolved by the
agreement between the supplier and purchaser. Objections to surface quality,
dimensions and their allowable deviations shall be raised within 1 month from the date
of receipt of products; other objections shall be raised within 3 months from the date of
receipt of products. If arbitration is required, it shall be determined by the agreement
between the supplier and purchaser.
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.
a) trial modeling and identification of new products or old p...