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GB/T 3620.1-2016 English PDF (GBT3620.1-2016)

GB/T 3620.1-2016 English PDF (GBT3620.1-2016)

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GB/T 3620.1-2016: Designation and composition of titanium and titanium alloys

This Standard specifies the designation and chemical composition of titanium and titanium alloy products.This Standard applies to various finished and semi-finished products (including ingots) pressure-processed by titanium and titanium alloys. 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 3620.1-2016
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 77.120.50
H 64
Replacing GB/T 3620.1-2007
Designation and composition
of titanium and titanium alloys
ISSUED ON. DECEMBER 30, 2016
IMPLEMENTED ON. NOVEMBER 01, 2017
Issued by. General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Chemical composition ... 5
4 Chemical composition analysis and analysis report ... 6
5 Others ... 7
Annex A (informative) Designation and chemical composition of deleted
titanium and titanium alloys ... 15
Annex B (informative) Correspondence between designations of industrial pure titanium in Table 2 of this Standard and pure titanium in ASTM
standard system ... 16
Annex C (normative) Naming rules for titanium and titanium alloys ... 17 Annex D (informative) Explanation on the implementation of this Standard and related standards ... 19
Foreword
This Standard was drafted according to the rules given in GB/T 1.1-2009. This Standard replaces GB/T 3620.1-2007 ?€?Designation and composition of titanium and titanium alloys?€?.
Compared with GB/T 3620.1-2007, the main technical content changes of this Standard are as follows.
- RESTORE the designation and chemical composition of industrial pure
titanium in GB/T 3620.1-1994;
- Uniformly CHANGE the designation of industrial pure titanium by adding ?€?G?€? behind the designation of industrial pure titanium;
- SORT the designations in tables according to the classification of titanium; - REVISE the editorial errors of TA22-1, TA24, TC15 and TC17 designations; - REVISE the Si content in TA19;
- ADD a total of 8 newly registered ??-type and near-??-type alloy designations, namely TA29, TA30, TA31, TA32, TA33, TA34, TA35 and TA36;
- ADD A total of 6 newly registered ??-type and near-??-type alloy designations, namely TB12, TB13, TB14, TB15, TB16 and TB17;
- ADD a total of 6 newly registered ??-??-type alloy designations, namely TC27, TC28, TC29, TC30, TC31 and TC32;
- ADD the naming rules for the designation of titanium alloys;
- SPECIFY the requirements for the implementation of designation and
chemical composition of industrial pure titanium.
This Standard is under the jurisdiction of the National Technical Committee on Non-ferrous Metals of Standardization Administration of China (SAC/TC 243). Drafting organizations of this Standard. Baoti Group Co., Ltd., Baoji Titanium Industry Co., Ltd., China Non-ferrous Metal Industry Standard Metrology and Quality Institute.
Participating drafting organizations of this Standard. Beijing Institute of Aeronautical Materials, Western Metal Materials Co., Ltd., Aerospace Research Institute of Materials and Processing Technology, CSIC Luoyang Ship Material Research Institute, CHALCO Shenyang Nonferrous Metal Processing Co., Ltd., Designation and composition
of titanium and titanium alloys
1 Scope
This Standard specifies the designation and chemical composition of titanium and titanium alloy products.
This Standard applies to various finished and semi-finished products (including ingots) pressure-processed by titanium and titanium alloys.
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 3620.2 Titanium and titanium alloys - Permissible variations of
chemical composition for wrought product analysis
GB/T 4698 (all parts) Methods for chemical analysis of titanium and titanium alloys
GB/T 8170 Rules of rounding off for numerical values and expression and
judgement of limiting values
3 Chemical composition
3.1 Designation and chemical composition
3.1.1 The designation and chemical composition of titanium and titanium alloy products shall comply with the specifications of Table 1, Table 2 and Table 3. Table 1 shows the designation and chemical composition of industrial pure titanium, ??-type and near-??-type titanium and titanium alloys; Table 2 shows the designation and chemical composition of ??-type and near-??-type titanium alloys; Table 3 shows the designation and chemical composition of ??-??-type titanium alloys.
3.1.2 Boron is added in nominal quantities and the measured data is reported for reference.
3.1.3 In Table 1, Table 2 and Table 3, when it only specifies the upper limit of Si element, it shall be controlled as an impurity element.
3.2 Other elements
3.2.1 Other elements refer to trace elements that are inherently present in the production process of titanium and titanium alloys, not artificially added elements.
3.2.2 Other elements generally include. Al, V, Sn, Mo, Cr, Mn, Zr, Ni, Cu, Si, Y (the alloy elements contained in this designation shall be removed). The Y content is not more than 0.005 %. When users have other special requirements, they shall be agreed upon between both parties and indicated in the contract. 3.2.3 The supply party may not test other elements when the product is shipped from the factory. The sampling inspection may be carried out when required by the user and specified in the contract.
3.3 Allowable deviation of compositions
When the demand party takes samples from products for chemical composition retest analysis, the allowable deviation of its compositions shall comply with GB/T 3620.2.
4 Chemical composition analysis and analysis report
4.1 The chemical composition arbitration analysis of titanium and titanium alloy products shall be carried out according to GB/T 4698, and the routine inspection may be carried out according to ICP or other approved methods.
4.2 Unless otherwise specified in the product standards, the supply party may take samples from titanium and titanium alloy ingots (or from the finished products for hydrogen element) for chemical composition analysis of products. 4.3 The chemical composition of titanium and titanium alloy products is allowed to have a second analysis, and the results of the second analysis are the basis for the final decision.
4.4 The analytical values in chemical composition analysis reports shall have the same number of significant digits as the corresponding limit values of the corresponding designations in this Standard. The figure behind the significant digit shall be rounded off according to the rules specified in GB/T 8170. Annex C
(normative)
Naming rules for titanium and titanium alloys
C.1 Basic rules for naming of designation
C.1.1 Classification
C.1.1.1 The designation of titanium and titanium alloys is divided into three categories, namely ??, ??-?? and ??.
C.1.1.2 The designation of titanium and titanium alloys is classified based on the results of the molybdenum equivalent calculated from the content of their nominal composition.
C.1.2 Naming rules
C.1.2.1 The naming of the designation of titanium and titanium alloys shall be based on the registration system. Before the naming of the designation, the designation shall be registered, and the name shall be unified.
C.1.2.2 The designation of titanium and titanium alloys is indicated by letters and numbers.
C.2 Combination method for designation
C.2.1 The first digit of the designation is capital letters ?€?T?€?, which indicates titanium and titanium alloys.
C.2.2 The second digit of the designation indicates the type of alloy, denoted by the capital letters A, B and C respectively. A denotes industrial pure titanium, ??-type and near-??-type alloys, B denotes ??-type and near-??-type alloys, and C denotes ??-?? type alloys.
C.2.3 The Arabic numerals in the designation are sorted by the natural order of registration.
C.2.4 The ultra-low-gap alloys of the same designation are marked with the letter ?€?ELI?€? after the numbers, and there is no gap between the numbers and ?€?ELI?€?.
C.3 Combination rules for nominal composition
C.3.1 The nominal composition of titanium alloy designations only lists the Annex D
(informative)
Explanation on the implementation
of this Standard and related standards
D.1 Explanation on the implementation of TA0, TA1, TA2 and TA3
designations
TA0, TA1, TA2, and TA3 specified in Table 1 of this Standard respectively correspond to the corresponding TA0, TA1, TA2, and TA3 designations and chemical composition in the related titanium national standards, national military standards and industrial standards issued before January 1, 2007. D.2 Explanation on the implementation of TA1GELI, TA1G, TA1G-1,
TA2GELI, TA2G, TA3GELI, TA3G, TA4GELI, TA4G designations
TA1GELI, TA1G, TA1G-1, TA2GELI, TA2G, TA3GELI, TA3G, TA4GELI, TA4G
specified in Table 1 of this Standard respectively correspond to the
corresponding TA1ELI, TA1, TA1-1, TA2ELI, TA2, TA3ELI, TA3, TA4ELI and
TA4 designations and chemical composition in GB/T 2965-2007, GB/T 3621- 2007, GB/T 3622-2012, GB/T 3623-2007, GB/T 3624-2010, GB/T 3625-2007,
GB/T 12769-2007, GB/T 13810-2007, GB/T 14845-2007, GB/T 16598-2013,
GB/T 26057-2010, GB/T 26058-2010, GB/T 26059-2010, GB/T 26723-2011,
GJB 2218A-2008, GJB 2505A-2008, YS/T 658-2007, YS/T 750-2011, YS/T
794-2012, YS/T 795-2012, YS/T 885-2013.
D.3 Reference standards
GB/T 2965-2007 Titanium and titanium alloy bars
GB/T 3621-2007 Titanium and titanium alloy plate and sheet
GB/T 3622-2012 Titanium and titanium alloy strip and foil
GB/T 3623-2007 Titanium and titanium alloy wire
GB/T 3624-2010 Titanium and titanium alloy seamless tubes
GB/T 3625-2007 Titanium and titanium alloy tube for condensers and heat exchangers
GB/T 12769-2007 Titanium-clad copper bar
GB/T 13810-2007 Wrought titanium and titanium alloy for surgical implants

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