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GB/T 26726: Historical versions
| Std ID | Version | USD | Buy | Deliver [PDF] in | Title (Description) |
| GB/T 26726-2019 | English | 199 |
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Ultrafine tungsten powder
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| GB/T 26726-2011 | English | 319 |
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Superfine tungsten powder
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Basic data
| Standard ID | GB/T 26726-2019 (GB/T26726-2019) |
| Description (Translated English) | Ultrafine tungsten powder |
| Sector / Industry | National Standard (Recommended) |
| Classification of Chinese Standard | H71 |
| Classification of International Standard | 77.160 |
| Word Count Estimation | 10,157 |
| Date of Issue | 2019-08-30 |
| Date of Implementation | 2020-07-01 |
| Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration |
GB/T 26726-2019: Ultrafine tungsten powder
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT26726-2019
(Ultrafine tungsten powder)
ICS 77.160
H71
National Standards of People's Republic of China
Replace GB/T 26726-2011
Ultrafine tungsten powder
Ultrafinetungstenpowder
Published on.2019-08-30
2020-07-01 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 26726-2011 "ultra-fine tungsten powder", compared with GB/T 26726-2011, except for editorial modification
The changes are as follows.
--- Subdivide the product grade and increase the FWN15, FWN20, FWN40, FWN50, FWN70 five grades of ultra-fine tungsten powder and
Related requirements, deleted the FWN60 grade, adjusted the requirements of the FWN30 grade, and added Table 3 (see Chapter 3,.2011)
Chapter 3 of the edition);
--- The content of W is changed from "balance" to not less than "99.95%" (see Table 1, Table 1 of the.2011 edition);
--- Increase the content requirements of Cd, Co, Cr, S, Ti, V (see Table 1, Table 1 of the.2011 edition);
--- Refining the carbon content requirements according to the product grade (see Table 1, Table 1 of the.2011 edition);
--- Increase "arbitration analysis in accordance with the provisions of GB/T 4324" (see 4.1,.2011 version 4.1);
--- The average particle size of the product is calculated according to the specific surface area, increasing the formula (1) (see 4.3,.2011 edition 4.2).
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. Chongyi Zhangyuan Tungsten Co., Ltd., Nanchang Cemented Carbide Co., Ltd., Zhuzhou Cemented Carbide Group
Limited company, Xi'an Baode Jiu Tu New Material Co., Ltd., Northwest Nonferrous Metal Research Institute.
The main drafters of this standard. Zhao Lifu, Xie Haigen, Zhang Qiulin, Yang Chenghui, Yang Ligeng, Lei Chunpeng, Yang Jun, Liang Yongren, Zheng Jing.
The previous versions of the standards replaced by this standard are.
---GB/T 26726-2011.
Ultrafine tungsten powder
1 Scope
This standard specifies the requirements, test methods, inspection rules and signs, packaging, transportation, storage, quality certificates and contracts for ultra-fine tungsten powder.
(or order form) content.
This standard applies to ultra-fine tungsten powder prepared by hydrogen reduction of tungsten oxide.
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 4324 (all parts) Tungsten chemical analysis method
GB/T 5314 powder metallurgy powder sampling method
Determination of specific surface area of solid materials by GB/T 19587 gas adsorption BET method
YS/T 559 tungsten emission spectrum analysis method
3 requirements
3.1 Brand
The ultrafine tungsten powder is classified into six grades of FWN15, FWN20, FWN30, FWN40, FWN50, and FWN70 according to the average particle diameter.
3.2 Chemical composition
The chemical composition of ultrafine tungsten powder should meet the requirements of Table 1.
Table 1 %
Chemical content (mass fraction)
The main element, not less than W 99.95
Impurity element,
no greater than
Al 0.0010
As 0.0015
Bi 0.0001
Ca 0.0010
Cd 0.0005
Co 0.0010
Cr 0.0010
Cu 0.0007
Fe 0.0050
K 0.0010
GB/T 26726-2019
(Ultrafine tungsten powder)
ICS 77.160
H71
National Standards of People's Republic of China
Replace GB/T 26726-2011
Ultrafine tungsten powder
Ultrafinetungstenpowder
Published on.2019-08-30
2020-07-01 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 26726-2011 "ultra-fine tungsten powder", compared with GB/T 26726-2011, except for editorial modification
The changes are as follows.
--- Subdivide the product grade and increase the FWN15, FWN20, FWN40, FWN50, FWN70 five grades of ultra-fine tungsten powder and
Related requirements, deleted the FWN60 grade, adjusted the requirements of the FWN30 grade, and added Table 3 (see Chapter 3,.2011)
Chapter 3 of the edition);
--- The content of W is changed from "balance" to not less than "99.95%" (see Table 1, Table 1 of the.2011 edition);
--- Increase the content requirements of Cd, Co, Cr, S, Ti, V (see Table 1, Table 1 of the.2011 edition);
--- Refining the carbon content requirements according to the product grade (see Table 1, Table 1 of the.2011 edition);
--- Increase "arbitration analysis in accordance with the provisions of GB/T 4324" (see 4.1,.2011 version 4.1);
--- The average particle size of the product is calculated according to the specific surface area, increasing the formula (1) (see 4.3,.2011 edition 4.2).
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. Chongyi Zhangyuan Tungsten Co., Ltd., Nanchang Cemented Carbide Co., Ltd., Zhuzhou Cemented Carbide Group
Limited company, Xi'an Baode Jiu Tu New Material Co., Ltd., Northwest Nonferrous Metal Research Institute.
The main drafters of this standard. Zhao Lifu, Xie Haigen, Zhang Qiulin, Yang Chenghui, Yang Ligeng, Lei Chunpeng, Yang Jun, Liang Yongren, Zheng Jing.
The previous versions of the standards replaced by this standard are.
---GB/T 26726-2011.
Ultrafine tungsten powder
1 Scope
This standard specifies the requirements, test methods, inspection rules and signs, packaging, transportation, storage, quality certificates and contracts for ultra-fine tungsten powder.
(or order form) content.
This standard applies to ultra-fine tungsten powder prepared by hydrogen reduction of tungsten oxide.
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 4324 (all parts) Tungsten chemical analysis method
GB/T 5314 powder metallurgy powder sampling method
Determination of specific surface area of solid materials by GB/T 19587 gas adsorption BET method
YS/T 559 tungsten emission spectrum analysis method
3 requirements
3.1 Brand
The ultrafine tungsten powder is classified into six grades of FWN15, FWN20, FWN30, FWN40, FWN50, and FWN70 according to the average particle diameter.
3.2 Chemical composition
The chemical composition of ultrafine tungsten powder should meet the requirements of Table 1.
Table 1 %
Chemical content (mass fraction)
The main element, not less than W 99.95
Impurity element,
no greater than
Al 0.0010
As 0.0015
Bi 0.0001
Ca 0.0010
Cd 0.0005
Co 0.0010
Cr 0.0010
Cu 0.0007
Fe 0.0050
K 0.0010
...
