GB/T 5231-2022 (GB/T5231-2022)

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GB/T 5231-2022: PDF in English (GBT 5231-2022)

GB/T 5231-2022
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.120.30
CCS H 62
Replacing GB/T 5231-2012
Designation and chemical composition of wrought copper
and copper alloys
ISSUED ON: MARCH 09, 2022
IMPLEMENTED ON: OCTOBER 01, 2022
Issued by: State Administration for Market Regulation;
Standardization Administration of the People's Republic of China.
Table of Contents
Foreword ... 3 
1 Scope ... 8 
2 Normative references ... 8 
3 Terms and definitions... 8 
4 Designations and codes ... 8 
5 Chemical composition ... 9 
Annex A (informative) Comparison between the designations in this document and the
corresponding designations in foreign standards ... 34 
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,
zinc is not more than 0.2%" (see Table 4 of this Edition, Table 4 of Edition
2012);
5) Delete the footnote that "Arsenic, antimony and bismuth may not be analyzed,
but the supplier must ensure that it is not greater than the threshold value" (see
Table 4 of Edition 2012);
6) Add the footnote that "For QAl10-3-1.5 for diesel engines, the upper limit of
the mass fraction of aluminum can reach 11.0%" (see Table 4 of this Edition);
k) The changes to Table 5 are as follows:
1) Add 13 designations and codes of cupronickel: BFe10-1.4-1, BSn9-6, BSn15-
8, BZn8-26, BZn10-25, BZn14-24, BZn12-24-1.1, BZn12-38-2, BSi3.2-0.7,
BSi2-0.45, BSi2- 0.8, BSi7-2-1, BCo19-0.4 (see Table 5 of this Edition);
2) Add the provisions of “Sum of copper + listed elements”; Delete the provisions
of “Sum of impurities” (see Table 5 of this Edition, Table 5 of Edition 2012);
3) Change the footnote from "For B19 cupronickel tape for special purposes,
materials with a mass fraction of silicon not more than 0.05% can be supplied"
to "For B19 cupronickel tape for precision machinery, the mass fraction of
silicon may not exceed 0.05%" (see Table 5 of this Edition, Table 5 of Edition
2012);
4) Delete the footnotes that "Bismuth, antimony and arsenic may not be analyzed,
but the supplier must ensure that it is not greater than the threshold value", "To
ensure electrical properties, for BMn3-12 alloy, BMn40-1.5 and BMn43-0.5
alloys used for thermocouples, the maximum and minimum components are
specified, and it is allowed to slightly exceed the specifications in the table"
(see Table 5 of Edition 2012).
Attention is drawn to the possibility that some of the elements of this Standard may be
the subject of patent rights. The issuing authority shall not be held responsible for
identifying any or all such patent rights.
This Standard was proposed by China Nonferrous Metals Industry Association.
This Standard shall be under the jurisdiction of National Technical Committee on Non-
ferrous Metals of Standardization Administration of China (SAC/TC 243).
The drafting organizations of this Standard: Chinalco Luoyang Copper Processing Co.,
Ltd., Zhejiang Hailiang Co., Ltd., Ningbo Bowei Alloy Materials Co., Ltd., Nonferrous
Metal Technology and Economic Research Institute Co., Ltd., Ningbo Xingye Shengtai
Group Co., Ltd., Ningbo Changzhen Copper Co., Ltd., Anhui Chujiang Technology
New Materials Co., Ltd., Anhui Xinke Copper Co., Ltd., Ningbo Jintian Copper (Group)
Co., Ltd., Jiangxi Naile Copper Co., Ltd., Jiangsu Cuilong Precision Copper Tube Co.,
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.
......
 
(Above excerpt was released on 2022-06-04, modified on 2022-06-04, translated/reviewed by: Wayne Zheng et al.)
Source: https://www.chinesestandard.net/PDF.aspx/GBT5231-2022