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GB/T 20508-2019 English PDF

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GB/T 20508-2019: Tantalum carbide powder
Status: Valid

GB/T 20508: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 20508-2019English199 Add to Cart 3 days [Need to translate] Tantalum carbide powder Valid GB/T 20508-2019
GB/T 20508-2006English399 Add to Cart 3 days [Need to translate] Tantalum carbide powder Obsolete GB/T 20508-2006

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Basic data

Standard ID GB/T 20508-2019 (GB/T20508-2019)
Description (Translated English) Tantalum carbide powder
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard H71
Classification of International Standard 77.160
Word Count Estimation 10,185
Date of Issue 2019-06-04
Date of Implementation 2020-05-01
Older Standard (superseded by this standard) GB/T 20508-2006
Quoted Standard GB/T 3249; GB/T 5314; GB/T 15076.1; GB/T 15076.5; GB/T 15076.13; GB/T 15076.10; GB/T 15076.11; GB/T 15076.12; GB/T 15076.14; GB/T 15076.15; GB/T 15076.16; GB/T 15076.2; GB/T 15076.3; GB/T 15076.4; GB/T 15076.6; GB/T 15076.7; GB/T 15076.9; GB/T 15076.8
Issuing agency(ies) State Administration for Market Regulation, China National Standardization Administration
Summary This standard specifies the requirements, test methods, inspection rules and markings, packaging, transportation, storage, quality certificates and contracts (or order forms) of tantalum carbide powder. This standard applies to tantalum carbide powder made from tantalum carbide (or tantalum powder). The product is used as an additive for the production of cemented carbide, etc.

GB/T 20508-2019: Tantalum carbide powder

---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.
Tantalum carbide powder ICS 77.160 H71 National Standards of People's Republic of China Replace GB/T 20508-2006 Tantalum carbide powder Published on.2019-06-04 2020-05-01 implementation State market supervision and administration China National Standardization Administration issued

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 20508-2006 "Carbide Powder", compared with GB/T 20508-2006, except for editorial modification The changes are as follows. --- Increased the content of Co, Cr, Mo, S, W impurities in each grade, modified the Fe, K, Na, Si, Ti impurities of TaC-1 Content requirements (see 3.2, 3.2 of the.2006 edition); ---Modified packaging method (see 6.2.1, 6.2.1 of.2006 edition); --- Revised the measurement range of the total carbon content in the normative Appendix A, the specifications and treatment methods of the porcelain boat, the correction factor of the formula (A.1) and The unit of reading (see A.1,.2006 edition of A.1). This standard was proposed by the China Nonferrous Metals Industry Association. This standard is under the jurisdiction of the National Nonferrous Metals Standardization Technical Committee (SAC/TC243). This standard was drafted. Jiujiang Nonferrous Metals Smelting Co., Ltd., Zhuzhou Cemented Carbide Group Co., Ltd., Ningxia Oriental Co., Ltd. Limited company, North Mine New Material Technology Co., Ltd., Nonferrous Metals Technology and Economic Research Institute. The main drafters of this standard. Zhang Hao, Chen Zhijian, Wu Yanhua, Zhang Junfeng, Zhu Fang, Gao Yaming, Shen Yi, Liu Haifei. The previous versions of the standards replaced by this standard are. ---GB/T 20508-2006. Tantalum carbide powder

1 Scope

This standard specifies the requirements, test methods, inspection rules and signs, packaging, transportation, storage, quality certificates and contracts for tantalum carbide powder. (or order form) and other content. This standard applies to tantalum carbide powder prepared from carbonized yttria (or tantalum powder). The product is used as an additive for the production of cemented carbide.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 3249 Determination of the particle size of metals and their compounds GB/T 5314 powder metallurgy powder sampling method GB/T 15076 (all parts) 钽铌 chemical analysis method

3 requirements

3.1 Product Classification 3.1.1 The product is divided into three grades according to chemical composition. TaC-1, TaC-2, TaC-3. 3.1.2 The product is divided into three specifications according to the particle size. 10, 15, 30. 3.2 Chemical composition The chemical composition of each grade of product shall comply with the requirements of Table 1. Table 1 % Grade TaC-1 TaC-2 TaC-3 TaC (mass score), not less than 99.5 99.0 99.0 Total carbon (mass fraction), not less than 6.2 6.2 6.2 Impurity content (mass fraction), no greater than Free carbon 0.10 0.15 0.15 Al 0.005 0.005 0.01 Ca 0.005 0.005 0.01 Co 0.05 0.10 0.10 Cr 0.005 0.01 0.02 Fe 0.02 0.10 0.20 K 0.002 0.005 0.01 Mo 0.005 0.01 0.02 N 0.025 0.05 0.05

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Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 20508-2019 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.