GB/T 26330-2023Clad metal strips of silver and silver alloys/copper and copper alloys (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1. Structure and Drafting Rules of Standardization Documents" Drafting.

This document replaces GB/T 26330-2010 "Silver, silver alloy/copper, copper alloy composite strip". Compared with GB/T 26330-2010, except In addition to structural adjustments and editorial changes, the main technical changes are as follows:

a) Changed the scope of application (see Chapter 1, Chapter 1 of the:2010 edition);

b) Changed the composition of strip varieties (see Table 1, Table 1 of the:2010 edition);

c) The composite form of coated inlaid strips and the multi-layer composite form are added (see Table 2);

d) Delete the supply status 1/4 hard state (Y4) (see 3.4 and Table 8 of the:2010 version);

e) The multi-layer grade has been changed (see Table 3, Table 6 of the:2010 version);

f) The basic grade has been changed (see Table 4, Table 7 of the:2010 edition);

g) The strip size and allowable deviation have been changed (see Table 5 and Table 6, Table 4 and Table 5 of the:2010 version);

h) Changed the strip hardness requirements (see Table 7, Table 8 of the:2010 edition);

i) Added requirements for tensile strength, elongation after break and test methods for cladding tapes with three layers or more (see 5.3.2 and 6.3.2);

j) The requirements and test methods for the bonding strength of cladding have been changed (see 5.4.2, 6.4.1.2, 6.4.2, 4.6 and 5.6 of the:2010 edition);

k) Changed the strip side curvature requirements (see 5.5, 4.5 of the:2010 edition);

l) Changed the surface roughness requirements (see 5.6, 4.7 of the:2010 edition);

m) Added chemical analysis methods for Au99.99 and Ag99.95 (see 6.1.2);

n) Changed the cladding thickness measurement method (see 6.2.2, 5.2.2 of the:2010 edition);

o) The hardness test method has been changed (see 6.3.1, 5.4 of the:2010 edition).

1 Scope

This document specifies the classification, requirements, inspection rules, marking, packaging, transportation and storage of silver and silver alloy/copper and copper alloy composite strips. Corresponding test methods are described.

This document is applicable to two-layer, three-layer or multi-layer composite strips with cladding of silver and silver alloy, gold and gold alloy and base layer of copper and copper alloy. (hereinafter referred to as "strip") manufacturing and inspection.

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document.

GB/T 228.1 Tensile testing of metallic materials Part 1. Room temperature test methods

GB/T 4340.1 Vickers hardness test of metallic materials Part 1. Test methods

GB/T 5121 (all parts) Chemical analysis methods for copper and copper alloys

GB/T 5231 Processed copper and copper alloy grades and chemical composition

GB/T 8888 Packaging, marking, transportation, storage and quality certificate of heavy non-ferrous metal processing products

GB/T 11066 (all parts) Methods for chemical analysis of gold

GB/T 11067 (all parts) Chemical analysis methods for silver

GB/T 15072 (all parts) Methods for chemical analysis of precious metal alloys

YS/T 370 Preparation method of metallographic samples of precious metals and their alloys

3 Terms and definitions

There are no terms or definitions to be defined in this document.

4 Categories