GB/T 5231-2022Designation and chemical composition of wrought copper and copper alloys (English PDF)

Foreword

This Standard was drafted in accordance with the rules given in GB/T 1.1-2020 "Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents".

This Standard replaces GB/T 5231-2012 "Designation and chemical composition of wrought copper and copper alloys". In this Standard, 213 designations in GB/T 5231- 2012 are kept, 133 designations are added, 346 designations in total. Compared with

GB/T 5231-2012, in addition to structural and editorial changes, the main technical changes in this Standard are as follows.

a) Add GB/T 29091 as a normative reference (see Chapter 2 of this Edition);

b) Add that "the naming method of the designations and codes of wrought copper and copper alloys shall be carried out according to the provisions of GB/T 29091" (see Chapter 4 of this Edition);

c) Delete that "The sum of impurities is the sum of all impurity elements other than the main components, mainly Ag, As, Bi, Cd, Co, Cr, Fe, Mn, Ni, O, P, Pb, S, Sb, Se, Si, Sn, Te, Zn and other elements" (see 2.3 of Edition 2012);

d) Delete that "When copper or zinc is the allowance element, the difference between all the analyzed elements and 100% may be taken" (see 2.4 of Edition 2012);

e) Add that "The sum of the elements listed in 'Cu+' is the minimum limit" (see 5.2 of this Edition); Add that "'The sum of the elements listed' means the sum of the elemental contents and allowances for which limit values are specified." (see 5.3 of this Edition);

f) Add that "The rounding of numerical values in Tables 1 to 5 shall be carried out in accordance with the provisions of GB/T 8170.The rounding digits of each element shall be consistent with the limit digits specified in Tables 1 to 5.The rounding value comparison method shall be used for judgment" (see 5.5 of this Edition);

g) The changes to Table 1 are as follows.

1) Add 20 designations and codes of pure copper. TUP0.002, TUP0.003, TUP0.008, TUAg0.08, T1.5, TAg0.05, TAg0.08, TAg0.2, TSn0.15-0.01, TSn0.12, TSn0.15, TSn0.3, TSn0.5, TZr0.1, TMg0.15, TMg0.25, TUAl0.15, TUAl0.25, TUAl0.35, TUAl0.60 (see Table 1 of this Edition);

2) Change "dispersed oxygen-free copper" to "dispersed copper" in the classification (see Table 1 of this Edition, Table 1 of Edition 2012);

3) Change the code of TMg0.2.Change T18658 to T15615.Change from "wrought high copper" to "wrought copper" (see Table 1 of this Edition, Table 2 of Edition 2012);

4) Delete the footnotes "Arsenic, bismuth and antimony may not be analyzed, but the supplier must ensure that it is not greater than the limit value", "The oxygen content of TU2 of oxygen-free copper for electricians is not more than 0.002%", "Pure copper wire billets for contact materials of electric locomotives. Bi<=0.0005%, Pb<=0.0050%, O<=0.035%, P<=0.001%, and the sum of other impurities<=0.03%" (see Table 1 of Edition 2012);

5) Change the footnote from "Conductive T2 copper with P not more than 0.001% can be supplied through negotiation between the two parties" to "T2 copper P for conductive use is not more than 0.001%" (see Table 1 of this Edition, Table 1 of Edition 2012);

6) Change the footnote from "This value is Cu+Ag+Te", "This value is Cu+Ag+Te+P" and "This value is Cu+Ag+S+P" to "This value is the sum of Cu+Ag+alloying elements" (see Table 1 of this Edition, Table 1 of Edition

2012);

h) The changes to Table 2 are as follows.

1) Add 28 designations and codes of high copper alloys. TBe1.9-0.2, TBe0.3-0.5, TBe0.3-0.7, TBe0.3-1.2, TBe2.4, TBe2.8, TNi0.6-0.2, TNi1.1-0.25, TNi1.3- 0.25, TNi1-1-0.25, TCr0.3-0.2-0.05, TCr0.5-0.15-0.1, TCr0.3-0.15-0.03, TCr0.3-0.1-0.02-0.03, TCr0.3-0.1-0.02, TCr0.6.TCr0.9, TMg0.35, TMg0.45, TMg0.6-0.2, TMg0.3-0.2, TSn2-0.6-0.15, TSn1.5-0.8-0.06, TSn2-0.2-0.06, TFe5, TFe0.75.TZn0.9-0.5, TTi3.0 (see Table 2 of this Edition);

2) Add the footnote "This value contains Ag" in the copper content of some designations (see Table 2 of this Edition, Table 2 of Edition 2012);

3) Add the provisions of "Sum of copper + listed elements"; Delete the provisions of "Sum of impurities" (see Table 2 of this Edition, Table 2 of Edition 2012);

i) The changes to Table 3 are as follows.

1) Add 52 designations and codes of brass. H96, H62.5, H60, H58, HCr90-0.3, HAs65-0.04, HAs63-0.04, HAs63-0.1, HAs62-0.04, HPb65-1.5, HPb63-1.5, HPb63-1.5-0.6, HPb63-1-0.6, HPb62-1-0.6, HPb62-3.4, HPb61-1.5, HPb61-3, HPb59-1.8, HPb59-2.8, HPb57-3, HSn88-0.7, HSn88-1, HSn88-2, HSn75-1, HSn71-1- 0.06, HSn71-1, HSn60-0.8, HSn60-0.4-0.2, HSn60-1-0.04, HSn61- 0.8-1.8, HBi58-1.5, HBi62-1.4-1, HMn61-2-1-0.5, HMn61-2- 1-1, HMn61-3- 1, HMn60-3-1.7-1, HMn58-3-1-1, HMn58-2-1-0.5, HMn58-2-2-0.5, HMn58- 3-2-0.8, HMn57-2-2-1, HSi76-3-0.06, HSi68-1.5, HSi68-1, HSi58-1.2, Designation and chemical composition of wrought copper and copper alloys

1 Scope

This Standard specifies the designation and chemical composition of wrought copper and copper alloys.

This Standard applies to wrought copper and copper alloy products produced by press working and to ingots and billets used therefor.

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 8170, Rules of rounding off for numerical values & expression and judgement of limiting values

GB/T 29091, Copper and copper alloy designation and code system

3 Terms and definitions

There are no terms and definitions that need to be defined in this document.

4 Designations and codes

4.1 The naming method of the designations and codes of wrought copper and copper alloys shall be carried out in accordance with the provisions of GB/T 29091.

4.2 See Annex A for the comparison table between the designations in this document and the corresponding designations in foreign standards.

NOTE: In Tables 1 to 5, the codes and designations starting with "C" are equivalent to the designations of the American ASTM standard.

5 Chemical composition

5.1 The designations and chemical compositions of wrought copper and copper alloys shall comply with the requirements in Tables 1 to 5.

5.2 In Table 1~Table 5, the content with upper and lower limits is the alloying element.

If the content is a single value, copper is the minimum limit, "Cu + sum of listed elements" is the minimum limit, and other impurity elements are the maximum limit.

5.3 "Sum of listed elements" means the sum of element contents and allowances specified with limit values.

5.4 The limit values of elements not listed in Tables 1 to 5 can be determined by negotiation between the supplier and the buyer.

5.5 The rounding of values in Tables 1 to 5 shall be carried out according to the provisions of GB/T 8170.The rounding digits of each element shall be consistent with the limit digits specified in Table 1~Table 5.The rounding value comparison method is used for judgement.