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GB/T 12769: Historical versions
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| GB/T 12769-2025 | English | 279 |
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| GB/T 12769-2015 | English | 130 |
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| GB/T 12769-2003 | English | 439 |
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| GB/T 12769-1991 | English | 239 |
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Basic data
| Standard ID | GB/T 12769-2025 (GB/T12769-2025) |
| Description (Translated English) | Titanium-clad copper bar |
| Sector / Industry | National Standard (Recommended) |
| Classification of Chinese Standard | H64 |
| Classification of International Standard | 77.150.50 |
| Word Count Estimation | 13,116 |
| Date of Issue | 2025-12-02 |
| Date of Implementation | 2026-07-01 |
| Older Standard (superseded by this standard) | GB/T 12769-2015 |
| Issuing agency(ies) | State Administration for Market Regulation, Standardization Administration of China |
GB/T 12769-2025: Titanium-clad copper bar
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 77.150.50
CCSH64
National Standards of the People's Republic of China
Replaces GB/T 12769-2015
Titanium-copper composite rod
Published on 2025-12-02
Implemented on July 1, 2026
State Administration for Market Regulation
The State Administration for Standardization issued a statement.
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 12769-2015 "Titanium-Copper Composite Rods". Compared with GB/T 12769-2015, the main differences are in structural adjustments and editorial changes.
Aside from the modifications, the main technical changes are as follows.
a) The manufacturing methods for composite bars, including hot extrusion, hot extrusion stretching, explosive bonding, and explosive bonding hot rolling, have been removed (see [link to documentation]).
Chapter 1 of the.2015 edition);
b) The grades TA1 and TA2 in composite materials have been removed (see 3.1.1.1 in the.2015 edition);
c) The supply status of composite rods BR and BM has been removed (see 3.1.1.2 in the.2015 version);
d) Added requirements for titanium-copper-steel composite rod products and related specifications (see 4.1.1, Table 1, and Table 2);
e) The specifications for the cross-sectional dimensions of rectangular composite bars have been changed (see Table 1,.2015 edition of Table 1);
f) The chemical composition requirements for composite rod cladding have been changed (see 5.1.2, 3.2.2 of the.2015 edition);
g) Increased requirements for the chemical composition of composite rod core materials (see 5.1.3);
h) The requirements for the straightness of composite bars have been changed (see 5.2.4, 3.3.4 in the.2015 version);
i) The requirements for the composite rod detection system have been increased (see A.2.4).
Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents.
This document was proposed by the China Nonferrous Metals Industry Association.
This document is under the jurisdiction of the National Technical Committee on Standardization of Nonferrous Metals (SAC/TC243).
This document was drafted by. Baoji Titanium Industry Co., Ltd., Baoji Special Steel Titanium Industry Co., Ltd., Baoji Titanium Group Co., Ltd., and Nonferrous Metals Industry Co., Ltd.
It belongs to the Technology and Economic Research Institute Co., Ltd., Western Superconducting Materials Technology Co., Ltd., and Xi'an University of Architecture and Technology.
The main drafters of this document are. Hu Zhijie, Feng Junning, Ma Zhongxian, Li Xinzhong, Liu Gang, Bai Zhihui, Zhang Jiangfeng, Xie Chen, Hao Xuebo, and Shi Xiaoyun.
Luo Guangyin, Sun Daliang, Ren Luze, Li Changjiang, He Shulin, Wang Kuaishe.
This document was first published in.1991, revised for the first time in.2003, revised for the second time in.2015, and this is the third revision.
Titanium-copper composite rod
1 Scope
This document specifies the classification and marking, technical requirements, test methods, inspection rules, marking, packaging, transportation, and storage of titanium-copper composite rods.
Accompanying documents and order details.
This document applies to titanium-copper/titanium-copper-steel composite bars (hereinafter referred to as "composite bars") used in the manufacture of metal anode electrolytic cells and other applications.
2 Normative references
The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.
For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.
This document.
GB/T 700 Carbon Structural Steel
GB/T 3620.1 Grades and Chemical Compositions of Titanium and Titanium Alloys
GB/T 5231 Grades and Chemical Compositions of Processed Copper and Copper Alloys
GB/T 6611 Terminology and Illustrations for Titanium and Titanium Alloys
GB/T 15073 Cast titanium and titanium alloys
GB/T 38982 Methods for Dimensional Inspection of Titanium and Titanium Alloy Processed Products
JB/T 10061 General Technical Conditions for Type A Pulse-Echo Ultrasonic Flaw Detector
3 Terms and Definitions
The terms and definitions defined in GB/T 6611 and GB/T 38982 apply to this document.
4.Classification and Labeling
4.1 Product Classification
4.1.1 Classification, status, and cross-sectional shape
4.1.1.1 Composite rods are divided into titanium-copper composite rods and titanium-copper-steel composite rods. The base material of the composite rod is copper, with typical grades such as T1 and T2; the cladding material is titanium.
Typical grades include ZTA1, ZTA2, TA1G, TA2G, TA3G, etc.; the core material of titanium-copper-steel composite rods is steel, with typical grades including Q235, etc.
4.1.1.2 Composite bars are supplied in hot-worked (R), cold-worked (Y) and annealed (M) states.
4.1.1.3 The cross-sectional shape of the composite bar is shown in Figure 1.Composite bars are classified into square bars (FXB) and rectangular bars (JXB) according to their cross-sectional shape.
Flat rod (BXB), drum-shaped rod (GXB), and round rod (YXB).
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