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GB/T 34497-2017 English PDF (GBT34497-2017)

GB/T 34497-2017 English PDF (GBT34497-2017)

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GB/T 34497-2017: Copper and copper alloy strip and foil for terminals and connectors

This Standard specifies the terms and definitions, requirements, test methods, inspection rules, signs, packaging, transportation, storage, quality certificates and purchase order (or contract) content for copper and copper alloy strip and foil for terminals and connectors. This Standard is applicable to copper and copper alloy strip and foil for terminals and connectors.
GB/T 34497-2017
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 77.150.30
H 62
Copper and copper alloy strip and foil for terminals
and connectors
ISSUED ON: OCTOBER 14, 2017
IMPLEMENTED ON: MAY 01, 2018
Issued by: General Administration of Quality Supervision, Inspection and Quarantine;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 5
4 Requirements ... 5
5 Test methods ... 22
6 Inspection rules ... 23
7 Signs, packaging, transportation, storage and quality certificate ... 25 8 Purchase order (or contract) content ... 26
Copper and copper alloy strip and foil for terminals
and connectors
1 Scope
This Standard specifies the terms and definitions, requirements, test methods, inspection rules, signs, packaging, transportation, storage, quality certificates and purchase order (or contract) content for copper and copper alloy strip and foil for terminals and connectors.
This Standard is applicable to copper and copper alloy strip and foil for terminals and connectors (hereinafter referred to as the strip and foil).
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 228.1-2010, Metallic materials - Tensile testing - Part 1: Method of test at room temperature
GB/T 232, Metallic materials - Bend test
GB/T 351, Metallic materials - Resistivity measurement method
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 8888, Wrought heavy non-ferrous metal products-packing, marking,
transportation, storing and certificate of quality
GB/T 26303.3, Measuring methods for dimensions and shapes of wrought
copper and copper alloys - Part 3: Sheets and strips
YS/T 478, Method for electrical conductivity measurement of copper and
copper alloys by use of eddy current
YS/T 482, Methods for analysis of copper and copper alloys - The atomic emission spectrometry
YS/T 483, Methods for analysis of copper and copper alloys - X-Ray
fluorescence spectrometric (wavelength dispersive)
YS/T 668, Sampling method of physical and chemical testing for copper and copper alloys
YS/T 815, Preparation Method of Test Pieces for Mechanical and
Technological Properties of Copper and Copper Alloys
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply. 3.1 sheet shape
The presence and degree of wave or buckling of the strip and foil.
4 Requirements
4.1 Product classification
4.1.1 Designations, states and specifications
The designations, states and specifications of the strip and foil shall comply with the provisions of Table 1.
The surface of the strip and foil shall be smooth and clean. There shall be no defects that affect the use.
5 Test methods
5.1 Chemical composition
The analysis of the chemical composition of the strip and foil is carried out according to the regulations of GB/T 5121 (all parts) or YS/T 482 or YS/T 483. The arbitration shall be conducted in accordance with the provisions of GB/T 5121 (all parts).
5.2 Dimensions and allowable deviation
5.2.1 The thickness and allowable deviation, width and allowable deviation of the strip and foil, side curvature, burr, longitudinal curl, and twist are tested in accordance with the provisions of GB/T 26303.3.
5.2.2 The sheet shape detection method for the strip and foil is cutting method: Slit the strip and foil with a unit length of 1m into 10mm wide strips evenly along the longitudinal direction. After slitting, each strip in the width direction will lose its restraint and recover elastically. It is manifested as elongation or contraction. Its longitudinal length will no longer be the same. Multiply the ratio of the difference between the longest bar and the shortest bar to the unit length by 105, and it shall be the sheet shape of the strip and foil, as shown in Figure 2. Calculate according to formula (1).
Figure 2 -- Schematic diagram of the elastic recovery of each slit after slitting in the width direction
where,
I - sheet shape of the strip and foil, in millimeters per millimeter (mm/mm), expressed as (I-unit);
??L - difference between the longest longitudinal slitting length and the shortest longitudinal slitting length of the foil along the width direction, in millimeters (mm);
L' - Longest longitudinal slitting length with the strip and foil, in millimeters (mm); L'' - Shortest longitudinal slitting length with the strip and foil, in millimeters (mm); L - Specified unit length of the strip and foil, in millimeters (mm).
5.3 Mechanical properties
The tensile test of the strip and foil is carried out according to the regulations of GB/T 228.1-2010. The specimen number is P02 or P04 in Table B.1 of Annex B of GB/T 228.1-2010. The Vickers hardness test of strip foil is carried out in accordance with the provisions of GB/T 4340.1.
5.4 Bending test
The bending test of the strip and foil is carried out in accordance with the provisions of GB/T 232.
5.5 Electrical properties
The electrical performance test of the strip and foil shall be carried out in accordance with the provisions of YS/T 478 or GB/T 351.
5.6 Bending stress relaxation test
The test method for bending stress relaxation of the strip and foil shall be negotiated and determined by the supplier and the purchaser.
5.7 Surface quality
The surface quality of the strip and foil shall be inspected visually.
6 Inspection rules
6.1 Inspection and acceptance
6.1.1 The strip and foil shall be inspected by the supplier?€?s technical supervision department, so as to ensure that the quality of the product meets the
requirements of this Standard and the purchase order (or contract). The supplier?€?s technical supervision department shall fill in the quality certificate. 6.1.2 The purchaser shall re-inspect the received product in accordance with the provisions of this Standard. If the inspection result does not conform to the requirements of this Standard and the purchase order (or contract), it shall be submitted to the supplier in written form and the supplier and the purchaser shall negotiate and resolve. Objections that belong to surface quality and dimensional deviations shall be raised within 1 month from the date of receipt of the product. Other quality objections shall be raised within 3 months after receiving the product. If arbitration is required, arbitration sampling shall be conducted jointly by both the supplier and the purchaser.
6.2 Batching
The strip and foil shall be submitted for acceptance in batches. Each batch consists of the products of the same designation, state and specification. The weight of each batch shall be no more than 4500kg (if the batch is the same melting time, the batch size may not be limited).
6.3 Inspection items
6.3.1 Each batch of the strip and foil shall be inspected for chemical composition, external dimensions and allowable deviations and surface quality.
6.3.2 Each batch of strip and foil shall be inspected for mechanical properties (tensile test or hardness test). Choose either tensile test or hardness test. When not specified in the contract, a tensile test shall be carried out. When the tensile test is selected, if the purchaser requires a hardness test and it is specified in the contract, the hardness test shall also be carried out. Hardness test results are for reference only. When the hardness test is selected, if the purchaser requires a tensile test and it is specified in the contract, the tensile test shall also be carried out. The tensile test results are for reference only.
6.3.3 If required by the purchaser and specified in the contract, each batch of strip and foil shall also be subjected to bending performance test, electrical performance test and bending stress relaxation test.
6.4 Sampling
Sampling of the strip and foil shall meet the requirements of Table 13. Sampling method is carried out according to YS/T 668. The preparation of mechanical properties and process performance specimens shall be carried out in
accordance with the provisions of YS/T 815.

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