GB/T 3620.1-1994 Titanium and titanium alloy grades and chemical composition GB/T3620.1-1994 standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Designation and composition of titanium and titanium alloys
Designation and composition of titanium and titanium alloys 1 Subject content and scope of application
This standard specifies the designation, chemical composition, etc. of titanium and titanium alloy products. This standard applies to various finished products and semi-finished products (including ingots) of titanium and titanium alloy pressure processing. 2 Reference standards
GB4698 Chemical analysis method of titanium and titanium alloys GB8170 Numerical rounding rules
GB/T3620.2 Designation and chemical composition of titanium and titanium alloys and allowable deviation of composition 3 Chemical composition
3.1 Designation and chemical composition
The designation and chemical composition of titanium and titanium alloy products shall comply with the provisions of Table 1. 3.1.1 Boron shall be added in nominal amount, and the measured data shall be reported for reference. 3.1.2 The sum of impurities "Fe+0" of TA7ELI brand shall not exceed 0.32%. 3.2 Other elements
GB/T 3620.1---94
Replaces GB362083
3.2.1 Other elements refer to trace elements inherent in the production process of titanium and titanium alloys, rather than 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 grade should be removed). When the user has other special requirements, they should be negotiated by both parties and indicated in the contract. 3.2.3 The supplier may not test other elements when the product leaves the factory, and they can be sampled when the user requires and indicates it in the contract. 3.3 Allowable deviation of composition
When the purchaser takes samples from the product for re-testing and analysis of the chemical composition, the allowable deviation of the composition shall comply with the provisions of GB/T3620.2. 4 Chemical composition analysis and analysis report
4.1 The arbitration analysis of the chemical composition of titanium and titanium alloy products shall be carried out in accordance with GB4698. 4.2 Unless otherwise specified in the product standard, the supplier may take samples from titanium and titanium alloy ingots for chemical composition analysis of the products. 4.3 The chemical composition of titanium and titanium alloy products is allowed to be analyzed for a second time, and the results of the second analysis shall be the basis for the final judgment. 4.4 The number of significant digits of the analysis value in the chemical composition analysis report shall be consistent with the number of significant digits of the corresponding limit value in the chemical composition table. The numbers after the significant digits shall be rounded according to the rules specified in GB8170. 5 Deleted titanium alloy grades
The deleted titanium alloy grades and their chemical compositions are shown in Appendix A. Approved by the State Bureau of Technical Supervision on February 20, 1994, 48
199412-01 implementation
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Chemical composition group
Ti-5Al-2.5Sn-
3Cu-1.5Zr
Ti-3A1-8Mo-
Ti-5A1-2. 5Cr
Ti-6Al-0. 6Cr
0. 4Fe-0.4Si-
Ti-6.5A1-
3.5Mo-0.25Si
GB/T 3620. 1-94
Appendix A
Deleted titanium alloy grades and chemical compositions
(Supplement)
Chemical composition,
5. 0 ~0. 4 ~
Impurities, not too low
0. 15|0. 10|0. 050. 015 0. 150.30
0.100.040.0150.15
0.500.400.100.050.0150.20
0.100.050.0250.30
0. 100. 05 0. 0150.15
Note: TA8 and TC7 are the brands deleted in this revision of the national standard. TB1 and TC5, TC8 are the brands deleted when the national standard was formulated in 1982. Additional notes:
This standard was proposed by China Nonferrous Metals Industry Corporation. This standard was drafted by Baoji Nonferrous Metals Processing Plant. The main drafters of this standard are Meng Qinglin, Zhang Yansheng and Cao Qidong. 52
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