JB/T 7778.4-1995
Method for chemical analysis of silver tungsten carbide electrical contact materials Acid separation-gas volumetric method for determination of free carbon content (English Version)
- Standard No.
- JB/T 7778.4-1995
- Language
- Chinese, Available in English version
- Release Date
- 1995
- Published By
- Professional Standard - Machinery
- Status
- 2008-07
- Replace By
- JB/T 7778.4-2008
- Latest
- JB/T 7778.4-2008
- Scope
- This standard specifies the method for determining the amount of free carbon in silver tungsten carbide electrical contact materials. This standard applies to the determination of free carbon content in silver tungsten carbide electrical contact materials. Measuring range; 2.00% ~ 5.00%.
JB/T 7778.4-1995 history
- 2008 JB/T 7778.4-2008 Test methods for chemical analysis of silver-tungsten carbide electric contact material.Part 4:Determination of free carbon content
- 1995 JB/T 7778.4-1995 Method for chemical analysis of silver tungsten carbide electrical contact materials Acid separation-gas volumetric method for determination of free carbon content
