GB/T 3190-2020Chemical composition of wrought aluminium and aluminium alloys (English PDF)

Foreword

This Standard was drafted in accordance with the rules in GB/T 1.1-2009. This Standard serves as a replacement of GB/T 3190-2008 Wrought Aluminum and Aluminum Alloy - Chemical Composition. In comparison with GB/T 3190-2008, apart from editorial modifications, the main technical changes are as follows:

---Normative References are modified (see Chapter 2; Chapter 2 of Version 2008);

---In the table of International Four-digit Designations and Chemical Composition, 79 designations are added; 6 designations are deleted (see 3.1.1;

3.1.1 of Version 2008);

---In the table of Domestic Four-character Designations and Chemical Composition, 29 designations are added; Designation - 2A97 is deleted (see 3.1.1;

3.1.1 of Version 2008);

---The header of the table of International Four-digit Designations and Chemical Composition and the table of Domestic Four-character Designations and Chemical Composition is modified; eight element columns are added. "Ag", "B", "Bi", "Ga", "Li", "Pb", "Sn" and "V" (see 3.1.1;

3.1.1 of Version 2008);

---The control requirements for aluminum and aluminum alloy materials for packaging are added (see 3.1.5);

---The requirements for sampling are modified (see 3.2;

3.2 of Version 2008);

---The requirements for component analysis are modified (see 3.3;

3.3 of Version 2008);

---The designations and chemical compositions of inactive alloys are added (see Appendix A);

1 Scope

China's national standard for the chemical composition of wrought aluminium and aluminium alloys, and the current edition of GB/T 3190, replacing the 2008 edition. It specifies the designations and the chemical composition limits of these alloys, together with the requirements for sampling and for compositional analysis, with a normative annex covering the designations and compositions of inactive alloys and an informative annex comparing the letter designations used in the tables with the designations previously used. It is the reference document of the Chinese aluminium industry: every wrought aluminium product standard, every drawing that calls up an alloy, and every mill certificate ultimately points back to the composition tables here. The document is built around two tables. The first gives the international four-digit designations - the 1000 to 8000 series registered internationally - with their composition limits, and the second gives the domestic four-character designations used in China for alloys that have no international registration. The 2020 revision is substantial on both. Seventy-nine designations were added to the international table and six removed; twenty-nine were added to the domestic table and one removed. Eight element columns were added to both - silver, boron, bismuth, gallium, lithium, lead, tin and vanadium - which reflects both the arrival of alloys deliberately containing these elements, aluminium-lithium above all, and the tightening of limits on elements such as lead that are now controlled for reasons of product regulation rather than metallurgy. Control requirements were added for aluminium and aluminium alloy materials used in packaging, and the sampling and analysis requirements were revised. Issued on 31 March 2020 and in force since 1 February 2021.

This Standard stipulates the chemical composition of wrought aluminum and aluminum alloys. This Standard is applicable to aluminum and aluminum alloy processed products (sheets, strips, foils, pipes, rods, profiles, wires and forgings, etc.) manufactured by the method of pressure machining, as well as the ingots and billets used.

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 7999 Optical Emission Spectrometric Analysis Method of Aluminum and Aluminum Alloys

GB/T 8170 Rules of Rounding off for Numerical Values & Expression and Judgement of Limiting Values

GB/T 16474 Designation System for Wrought Aluminum and Aluminum Alloy

GB/T 17432 Methods for Sampling for Analyzing the Chemical Composition of Wrought Aluminum and Aluminum Alloys

GB/T 20975 (all parts) Methods for Chemical Analysis of Aluminum and Aluminum Alloys

GB/T 27675 Designation System for Aluminum and Aluminum Alloys Composite Sheets, Strips and Foils YS/T 870 Chemical Analysis of High Purity Aluminum - Determination of Trace Impurities - Inductively Coupled Plasma Mass Spectrometry

4 Others

4.1 The designations and chemical compositions of inactive alloys are shown in Appendix A.

4.2 Please refer to Appendix B for the comparison relationship of four-character designations and previously used designations.

Appendix A

(normative) Designations and Chemical Compositions of Inactive Alloys The designations and chemical compositions of inactive alloys are shown in Table A.1.