GB/T 18813-2014Copper strip for transformer (English PDF)

Foreword

This Standard was drafted in accordance with the rules provided in GB/T 1.1-2009.

This Standard serves as a replacement of GB/T 18813-2002 Transformer Copper Strip. In comparison with GB/T 18813-2002, the main changes are as follows:

---The code representation for alloys is added;

---Strip with a thickness > 2.5 mm ~ 3.0 mm and a width <= 610 mm is added;

---The width range of the strip is modified: for strip with a thickness 0.1 mm ~ < 0.5 mm, the width is modified from 600 mm into 610 mm; for strip with a thickness 0.5 mm ~ 2.5 mm, the width is modified from 1,000 mm into 1,050 mm;

---The allowable deviation of the thickness of the strip becomes more rigorous;

---The stipulation of burrs on the cutting-edge of the strip becomes more rigorous;

---The stipulation that "chemical composition analysis shall be conducted in accordance with the stipulations of YS/T 482" is added;

---The stipulation that "the inspection of overall dimensions of the strip shall be conducted in accordance with the stipulations of GB/T 26303.3" is added;

---The stipulation that "specimen preparation shall be conducted in accordance with the stipulations of YS/T 815" is added;

---The stipulation that "sampling method shall comply with the stipulations of YS/T 668" is added.

1 Scope

This Standard specifies the requirements, test methods, inspection rules, marking, packaging, transportation, storage, quality certificate and order sheet (or contract) of copper strip for transformer.

This Standard is applicable to copper strip for winding transformer coil.

2 Normative References

The following documents are indispensable to the application of this Document. In terms of references with a specified date, only versions with a specified date are applicable to this Document. In terms of references without a specified date, the latest version (including all the modifications) is applicable to this Document.

GB/T 228.1-2010 Metallic Materials - Tensile Testing - Part 1: Method of Test at Room Temperature

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 Method for Analysis of Copper and Copper Alloys - The Atomic Emission Spectrometry

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 stipulations of GB/T 5121 (all parts).

4 Test Methods

5 Inspection Rules