GB/T 15073-2014 English PDF (GBT15073-2014)

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GB/T 15073-2014: Casting titanium and titanium alloys
GB/T 15073-2014
GB
NATIONAL STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 77.120.50
J 31
Replacing GB/T 15073-1994
Casting titanium and titanium alloys
ISSUED ON. SEPTEMBER 03, 2014
IMPLEMENTED ON. JUNE 01, 2015
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 Alloy designation, code and chemical composition ... 5 
4 Chemical composition analysis ... 7 
Foreword
This standard was drafted in accordance with the rules given in GB/T
1.1-2009.
This standard replaces GB/T 15073-1994 “Designation and chemical
composition of cast titanium and titanium alloys”. As compared with GB/T
15073-1994, the main technical changes of this standard are as follows.
- CHANGE the standard name into “Casting titanium and titanium alloys”;
- MODIFY the chapter name and chapter structure;
- ADD the title to each table;
- In the ZTC4 alloy, MODIFY the Al element composition range from “5.5% ~
6.8%” to “5.50% ~ 6.75%”.
- ADD the chemical composition of ZTA9, ZTA10, ZTA15 and ZTA17 alloys;
- ADD the descriptions on the specific element analysis;
- ADD the descriptions on arbitration analysis;
- MODIFY the composition range and allowable deviation in Table 2; ADD
the range of Al element, Mo element, and V element; ADD the allowable
composition deviation of Zr element, Ni element, and Pd element.
This standard was proposed by AND shall be under the jurisdiction of the
National Foundry Standardization Technical Committee (SAC/TC 54).
The responsible drafting organizations of this standard. Shenyang Foundry
Research Institute, China Aviation Industry Corporation Beijing Aeronautical
Materials Research Institute.
The participating drafting organizations of this standard. China Shipbuilding
Heavy Industry Group No. 725 Research Institute, Baoji Titanium Industry Co.,
Ltd., Guizhou Anji Aviation Precision Casting Co., Ltd., Beijing Xinghang
Electromechanical Equipment Co., Ltd., Wuchang Shipbuilding Heavy Industry
Group Co., Ltd.
The main drafters of this standard. Liu Hongyu, Xie Huasheng, Nan Hai, Yang
Xuedong, Feng Junning, Liu Qin, Ma Linzhi, Zhang Riheng, Zhao Jun, Zhu
Zhongren.
Casting titanium and titanium alloys
1 Scope
This standard specifies the designations, code and chemical composition, and
chemical composition analysis methods for the casting titanium and titanium
alloys.
This standard is applicable to titanium and titanium alloys of graphite type,
tamping type, metal type and investment pattern precision casting.
2 Normative references
The following documents are essential to the application of this document. For
the dated documents, only the versions with the dates indicated are applicable
to this document; for the undated documents, only the latest version (including
all the amendments) are applicable to this Standard.
GB/T 4698 (all parts) Methods for chemical analysis of sponge titanium,
titanium and titanium alloys
GB/T 8063 Designation representation of cast nonferrous metals and their
alloys
GB/T 8170 Rules of rounding off for numerical values and expression and
judgment of limiting values
3 Alloy designation, code and chemical composition
3.1 Designations and codes
3.1.1 The casting titanium and titanium alloy designations are presented in
accordance with the provisions of GB/T 8063.
3.1.2 The casting titanium and titanium alloy code is composed of ZT plus A, B
or C (A, B and C respectively represent type α, type β and type α + β alloy) and
the sequence number, AND the sequence number shall make reference to the
presentation method of the same type wrought titanium and titanium alloy.
3.2 Chemical composition
The chemical analysis sample is cut on a casting rod or cast AND is allowed to
be cut from the runner. Chemical analysis sample must be clean, AND free of
mixed impurities or casting surfaces.
4.2 Analytical methods and analysis reports
4.2.1 Chemical composition analysis shall follow the provisions of GB/T 4698
(all parts). As negotiated between the supplier and the purchaser, it may also
use other test methods for analysis. In case of dispute on the result, it shall
GB/T 4698 (all parts) for arbitration.
4.2.2 Where the purchaser requires providing the specific element content as
not listed in this standard, the supplier shall analyze its chemical composition
AND indicate it out in the analysis report.
4.2.3 The number of effective digits of the numerical value as reported in the
chemical composition analysis shall be consistent with the number of the
effective digits of the corresponding limit values in Table 1. The analysis value
shall be rounded off in accordance with the provisions of GB/T 8170.
4.2.4 When the chemical composition is re-inspected and analyzed by the
purchaser, the allowable composition deviation shall comply with the
requirements of Table 2.
4.2.5 When the chemical composition inspection is disqualified for the first time,
it is allowed to re-take sample for analysis with the sample amount doubled,
AND if any one item is disqualified in the second analysis results, it is deemed
as disqualified.