GB/T 2529-2012Copper sheets and bars for electrical conduction purpose (English PDF)

Foreword

This Standard is drafted according to the rules given in GB/T 1.1-2009.

The major technical specifications of the bars in this Standard reference to and adopt the contents of the bars in ASTM B 187M-2006 Copper bars, rods and shapes for bus bars.

This Standard replaces GB/T 2529-2005 Copper sheets and bars for electrical conduction purpose.

Compared with GB/T 2529-2005, the major changes in this Standard are as follows.

- ADD "TU2" and "TU3" to the alloy designations of the products.

- USE the new edition of Temper designations for copper and copper alloys to represent the product state.

- ADD GB/T 26303.3 Measuring methods for dimensions and shapes of wrought copper and copper alloys - Part 3: Sheets and strips, YS/T 478 The method for electrical conductivity measurement of copper and copper alloys by use of eddy current, and YS/T 482 Methods for analysis of copper and copper alloys - The atomic emission spectrometry to normative references.

- DELETE "1/8 hard" from the state of the sheets and bars.

- INCREASE the maximum length of the sheets and bars from "8,000mm" to "12,000mm".

- DIVIDE the straightness of longitudinal edge according to the state as required.

- ADD the requirements for rounding off to the contents of the edge appearance.

- For the percentage elongation after fracture in the mechanical properties of the sheets and bars, MODIFY the "long specimen A11.3" to "short specimen A".

- ADD the property indicators of the resistivity to the electrical property of the sheets and bars.

1 Scope

This Standard specifies the requirements, test methods, inspection rules, symbols, packaging, transportation, storage, and contents of the quality certificate and contract (or order form) of the copper sheets and bars for electrical conduction purpose.

This Standard is applicable to the copper sheets and bars for electrical conduction purpose used in industrial sectors, such as smelting sector, electric power sector, chemical sector, plating sector, etc.

2 Normative references

The following documents are essential to the application of this document. For dated references, only the editions with the dates indicated are applicable to this document. For undated references, only the latest editions (including all the amendments) are applicable to this document.

GB/T 228.1-2010 Metallic materials - Tensile testing - Part 1: Method of test at room temperature (ISO 6892-1:2009, MOD)

GB/T 230.1 Metallic materials - Rockwell hardness test - Part 1: Test method

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 (ISO 6507-1:2005, MOD)

GB/T 5121 (all Parts) Methods for chemical analysis of copper and copper alloys

GB/T 5231 Wrought copper and copper alloys chemical composition limits and forms of wrought products

GB/T 8888 Wrought heavy non-ferrous metal products - Packing, marking, transporting and storing

GB/T 26303.3 Measuring methods for dimensions and shapes of wrought copper and copper alloys - Part 3: Sheets and strips

YS/T 478 The 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

3 Term and definition

The following term and definition are applicable to this document.

4 Requirements

4.7.3 The hot-rolled sheets and bars shall be pickled. However, those whose lengths are greater than 3,000mm do not have to be pickled.

5 Test methods