GB/T 26725-2023 English PDF

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GB/T 26725-2023: Ultrafine tungsten carbide powder
Status: Valid

GB/T 26725: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 26725-2023	189	Add to Cart	3 days	Ultrafine tungsten carbide powder	Valid
GB/T 26725-2011	279	Add to Cart	3 days	Superfine tungsten carbide power	Obsolete

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GB/T 26055   GB/T 26300   GB/T 26031   GB/T 45327   GB/T 26726   

Basic data

Standard ID: GB/T 26725-2023 (GB/T26725-2023)
Description (Translated English): Ultrafine tungsten carbide powder
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H71
Classification of International Standard: 77.160
Word Count Estimation: 10,164
Date of Issue: 2023-08-06
Date of Implementation: 2024-03-01
Older Standard (superseded by this standard): GB/T 26725-2011
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 26725-2023: Ultrafine tungsten 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.
ICS 77.160 CCSH71 National Standards of People's Republic of China Replace GB/T 26725-2011 Ultrafine tungsten carbide powder Published on 2023-08-06 2024-03-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration Committee

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents" Drafting. This document replaces GB/T 26725-2011 "Ultrafine Tungsten Carbide Powder". Compared with GB/T 26725-2011, this document except for structural adjustments In addition to editorial changes, the main technical changes are as follows. a) The classification has been changed (see Chapter 4, 3.1 of the.2011 edition); b) Removed the requirement for average particle size (see 3.3 of the.2011 version); c) The specific surface area requirements of the product have been changed (see 5.1, 3.3 of the.2011 edition); d) Added requirements for the content of As, Bi, Cd, Co, Cu, Mn, Ni, P, Pb, Sb, Sn, and Ti (see 5.2); e) The total carbon content and free carbon content of the product have been changed (see 5.3, 3.3 of the.2011 version); f) Changed the oxygen content requirements of products (see 5.4, 3.3 of the.2011 version); g) The test method for chemical composition has been changed (see 6.2, 4.1 of the.2011 edition); h) The test method for total carbon content has been changed (see 6.3, 4.2 of the.2011 edition); i) Added the material of the outer packaging barrel (see 8.2). Please note that some content in this document may be subject to patents. The publisher of this document assumes no responsibility for identifying patents. This document is proposed by the China Nonferrous Metals Industry Association. This document is under the jurisdiction of the National Nonferrous Metals Standardization Technical Committee (SAC/TC243). This document was drafted by. Xiamen Jinlu Special Alloy Co., Ltd., Zhuzhou Cemented Carbide Group Co., Ltd., Zigong Cemented Carbide Co., Ltd. Ren Company, Chongyi Zhangyuan Tungsten Industry Co., Ltd., Nanchang Cemented Carbide Co., Ltd., and Hubei Green Tungsten Resource Recycling Co., Ltd. The main drafters of this document. Lin Gaoan, Long Benfu, Wang Yue, Gao Guanjin, Lu Bizhi, Gong Bin, Zhu Ronghua, Huang Shuai, Zhong Wei, Zhong Zhiqiang, Huang Shuai, Wu Aihua, Feng Hao, Huang Jian, Zhou Xicheng, Zhong Zhichao. This document was first published in.2011 and this is the first revision. Ultrafine tungsten carbide powder

1 Scope

This document stipulates the product classification, technical requirements, test methods, inspection rules, marking, packaging, transportation, storage, and follow-up of ultrafine tungsten carbide powder. line documents and order form contents. This document is applicable to the production of ultrafine tungsten carbide powder for powder metallurgy products such as cemented carbide.

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document. GB/T 4324.17 Methods for chemical analysis of tungsten Part 17.Determination of sodium content Flame atomic absorption spectrometry GB/T 4324.18 Methods for chemical analysis of tungsten Part 18.Determination of potassium content Flame atomic absorption spectrometry GB/T 4324.23 Methods for chemical analysis of tungsten Part 23.Determination of sulfur content Combustion conductivity method and high-frequency combustion infrared absorption method GB/T 4324.24 Methods for chemical analysis of tungsten Part 24.Determination of phosphorus content Molybdenum blue spectrophotometry GB/T 4324.25 Methods for chemical analysis of tungsten Part 25.Determination of oxygen content Pulse heating inert gas melting-infrared absorption method GB/T 5124.2 Chemical analysis method for cemented carbide - Determination of insoluble (free) carbon content by gravimetric method GB/T 5314 Powder sampling method for powder metallurgy GB/T 19587 Determination of specific surface area of solid materials by gas adsorption BET method JB/T 6647 Gas volumetric method for determination of total carbon content in carbides YS/T 559 Tungsten emission spectrum analysis method

3 Terms and definitions

There are no terms or definitions to be defined in this document.

4 product categories

The products are divided into five grades. FWC001, FWC002, FWC003, FWC004 and FWC005 according to their specific surface area.

5 Technical requirements

5.1 Specific surface area The specific surface area of the product should comply with the requirements in Table 1. ......

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