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GB/T 4187-2017 English PDF

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GB/T 4187-2017: Tungsten bars and rods
Status: Valid

GB/T 4187: Historical versions

Standard IDUSDBUY PDFLead-DaysStandard Title (Description)Status
GB/T 4187-2017199 Add to Cart 3 days Tungsten bars and rods Valid
GB/T 4187-1984159 Add to Cart 2 days Tungsten rods Obsolete

Similar standards

GB/T 4184   GB/T 5838.43   GB/T 5593   GB/T 4181   

Basic data

Standard ID: GB/T 4187-2017 (GB/T4187-2017)
Description (Translated English): Tungsten bars and rods
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: L90
Classification of International Standard: 31.030
Word Count Estimation: 10,110
Date of Issue: 2017-07-31
Date of Implementation: 2018-02-01
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China

GB/T 4187-2017: Tungsten bars and rods

---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.
Tungsten bars and rods ICS 31.030 L90 National Standards of People's Republic of China Replacing GB/T 4187-1984, GB/T 4189-1984 Tungsten bars and tungsten rods 2017-07-31 Posted 2018-02-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China China National Standardization Administration released

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 4187-1984 "tungsten rod" and GB/T 4189-1984 "doped tungsten." And GB/T 4187-1984, GB/T 4189-1984 compared to the main technical changes are as follows. --- Modify the material grades, while deleting the use of different grades (see 3.1, GB/T 4187-1984 1.1, GB/T 4189- 1984, 1.1); --- Modify the chemical composition of the content of impurity elements (see 3.2, GB/T 4187-1984 2.1, GB/T 4189-1984 Of 2.1); --- Increase the tungsten rod varieties and requirements (see 3.3.1); --- Modify the tungsten rod and tungsten rod size specifications (see 3.3.1, 3.3.2.1, GB/T 4187-1984 1.2,1.3,2.2, GB/T 4189-1984 of 1.2); --- Modify the tungsten rod straightness requirements and test methods (see 3.4,4.3, GB/T 4187-1984 2.5,3.7); --- Polished tungsten rod "ovality" was revised to "roundness" and increased testing methods (see 3.5,4.4, GB/T 4187-1984 of 2.3); --- Modify the tungsten bar density range (see 3.6, GB/T 4189-1984 2.5); --- Modify the tungsten rod and tungsten rod surface quality requirements, while increasing the polished tungsten rod roughness requirements (see 3.8, 2.4 of GB/T 4187-1984, 2.2.3 of GB/T 4189-1984); --- Remove the high temperature creep and high temperature treatment of the microstructure requirements (see GB/T 4187-1984 2.6, GB/T 4189-1984 of 2.7). Please note that some of this document may be patentable. The issuing agencies of this document do not bear the responsibility of identifying these patents. This standard by the People's Republic of China Ministry of Industry and Information Technology (E) proposed and centralized. This standard was drafted in. Chengdu Hongbo Industrial Co., Ltd., China Electronics Standardization Institute. The main drafters of this standard. Li Jian, Wang Jinsong, Liu Yun. This standard replaces the standards previously issued as. --- GB/T 4187-1984; --- GB/T 4189-1984. Tungsten bars and tungsten rods

1 Scope

This standard specifies the tungsten rod and tungsten rod requirements, test methods, inspection rules, signs, packaging, transportation and storage.
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