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GB/T 3458-2006

Chinese Standard: 'GB/T 3458-2006'
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BASIC DATA
Standard ID GB/T 3458-2006 (GB/T3458-2006)
Description (Translated English) Tungsten powder
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard H63
Classification of International Standard 77.150.99
Word Count Estimation 6,663
Date of Issue 2006-07-18
Date of Implementation 2006-11-01
Older Standard (superseded by this standard) GB/T 3458-1982
Quoted Standard GB/T 1480; GB/T 2596; GB/T 3249; GB/T 4324; GB/T 5314
Drafting Organization Zhuzhou Cemented Carbide Group Co., Ltd.
Administrative Organization National Nonferrous Metals Standardization Technical Committee
Regulation (derived from) China National Standard Approval Announcement 2006 No.8 (Total No.95)
Proposing organization China Nonferrous Metals Industry Association
Issuing agency(ies) Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China; Standardization Administration of China
Summary This standard specifies the requirements for tungsten powder, test methods, inspection rules, signs, storage and content of the contract, transport, packaging. This standard applies to hydrogen reduction of tungsten oxide, tungsten powder preparation.

GB/T 3458-2006
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.150.99
H 63
Replacing GB/T 3458-1982
Tungsten Powder
钨粉
ISSUED ON. JULY 18, 2006
IMPLEMENTED ON. NOVEMBER 01, 2006
Jointly issued by. General Administration of Quality Supervision,
Inspection and Quarantine (AQSIQ);
Standardization Administration (SAC) of the People's
Republic of China.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative References... 4 
3 Requirements ... 4 
4 Test Methods... 6 
5 Inspection Rules ... 6 
6 Marking, Packaging, Transportation, and Storage ... 7 
7 Contract (or Order) Contents ... 8 
Foreword
This Standard is a revision to GB/T 3458-1982 "Technical Requirements of Tungsten
Powders".
Compared with GB/T 3458-1982, the major changes in this Standard are as follows.
- Tungsten powder is divided into 14 specifications according to the granularity;
- For FW-1, impurity element indexes such as Pb, Bi, Sn, As, Sb or Mn are added;
for FW-1 and FWP-1, impurity element index Cu is added; content of some
impurity elements of 3 designations was reduced; for FW-1 and FW-2, the
oxygen content index is adjusted according to the granularity;
- Requirements for mesh number of FW-1 and FW-2 are deleted;
- Sieve-screening and apparent density of FWP-1 are adjusted.
This Standard was proposed by the China Nonferrous Metals Industry Association.
This Standard shall be under the jurisdiction of the National Standardization Technical
Committee of Non-Ferrous Metal.
This Standard is responsibly drafted by Zhuzhou Hard Alloy Group Co., Ltd.
Chief drafting staffs of this Standard. Liu Tiemei, Yang Dongyuan, Li Xianping, Yang
Jianguo, He Guoxin and Zhang Jiangfeng.
The National Standardization Technical Committee of Non-ferrous Metal is
responsible for the interpretation of this Standard.
The previous editions replaced by this Standard are as follows.
- GB/T 3458-1982, and YB 1570-1978.
Tungsten Powder
1 Scope
This Standard specifies tungsten powder’s requirements, test methods, inspection
rules, marking, packaging, transportation, storage, and contract contents.
This Standard is applicable to tungsten powder that is made by hydrogen reducing
tungsten oxide.
2 Normative References
The following standards contain provisions which, through reference in this Standard,
constitute provisions of this Standard. For dated references, the subsequent
amendments (excluding corrigendum) or revisions of these publications do not apply.
However, parties who enter into agreement according to this Standard are
encouraged to investigate whether the latest editions are applicable. For undated
references, the latest edition of the standard referred to applies.
GB/T 1480 Determination of Particle Size for Metallic Powders - Dry Sieving
GB/T 2596 Tungsten Powder and Tungsten Carbide Powder - Determination of
Specific Surface Product (Average Graininess) - Simplified Nitrogen Absorption
Method
GB/T 3249 Standard Method for Determination of Particle Size of Powders of
Refractory Metals and Compounds - Fisher Method
GB/T 4324 (All Parts) Methods for Chemical Analysis of Tungsten
GB/T 5314 Powders for Powder Metallurgical Purposes - Sampling
3 Requirements
3.1 Product classification
3.1.1 According to chemical composition and purpose, tungsten powder is classified
into 3 designations - FW-1, FW-2, and FWP-1. FW-1 is applicable to materials for
tungsten carbide powder, large slab or factory lumber; FW-2 is applicable to contact
alloys and high-density shielding materials; and FWP-1 is applicable to plasma
spraying materials.
3.1.2 According to the particle-size range, tungsten powder is classified into 14
specifications.
6.3 Each batch of products shall be accompanied with quality certificate, and noted
with.
a) The name, address and post code of the supplier;
b) Name, designation and specification of the products;
c) Batch No.;
d) Net weight;
e) Serial No. of this Standard;
f) Each item’s analysis-inspection results and seal of quality supervision
department;
g) Inspector No.;
h) Inspection date.
6.4 During transportation, the products shall be free from humidity and strenuous
collision.
6.5 Products shall be stored at dry and venti......
Related standard: GB/T 3460-2017    GB/T 3457-2013
Related PDF sample: GB/T 21183-2017    GB/T 26314-2010