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Database: 189759 (19 Oct 2025)
JB/T 7778.1-2008 English PDF
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JB/T 7778.1-2008
: Test methods for chemical analysis of silver-tungsten carbide electric contact material. Part 1: Determintion of silver content
Status: Valid
JB/T 7778.1: Evolution and historical versions
Standard ID
Contents [version]
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STEP2
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Standard Title (Description)
Status
PDF
JB/T 7778.1-2008
English
169
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Test methods for chemical analysis of silver-tungsten carbide electric contact material. Part 1: Determintion of silver content
Valid
JB/T 7778.1-2008
JB/T 7778.1-1995
English
199
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2 days [Need to translate]
(Silver tungsten electrical contact material for chemical analysis methods. Thiocyanate method for the determination of silver content capacity)
Obsolete
JB/T 7778.1-1995
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Basic data
Standard ID
JB/T 7778.1-2008 (JB/T7778.1-2008)
Description (Translated English)
Test methods for chemical analysis of silver-tungsten carbide electric contact material. Part 1: Determintion of silver content
Sector / Industry
Mechanical & Machinery Industry Standard (Recommended)
Classification of Chinese Standard
K14
Classification of International Standard
29.120.20
Word Count Estimation
6,676
Date of Issue
2008-02-01
Date of Implementation
2008-07-01
Older Standard (superseded by this standard)
JB/T 7778.1-1995
Regulation (derived from)
?National Development & Reform Commission Announcement 2008 No.11
Issuing agency(ies)
Ministry of Industry and Information Technology
Summary
This standard specifies the method for the determination of silver tungsten electrical contact material silver content. This section applies to the determination of silver in silver tungsten contact material mass fraction. Measuring range: 80. 00%-90. 00%.