- Standard No.
- GB/T 7730.7-1988
- Language
- Chinese
- Release Date
- 1988
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
- Replace By
-
GB/T 5686.5-2008
- Lastest
-
GB/T 5686.5-2008
- Scope
- This standard applies to the determination of carbon content in ferromanganese and blast furnace ferromanganese. Measuring range: 4.00% to 8.00%.
GB/T 7730.7-1988 history
- 2008 GB/T 5686.5-2008 Ferromanganese, ferromanganese-silicon, nitrogen-bearing ferromanganese and manganese metal. Determination of carbon content. The infrared absorption method, the gasometric method, the gravimetric and the coulometric method
- 1988 GB/T 7730.7-1988 Methods for chemical analysis of ferromanganese and blast furnace ferromanganese--The gravimetric method for determination of carbon content
GB/T 7730.7-1988 Methods for chemical analysis of ferromanganese and blast furnace ferromanganese--The gravimetric method for determination of carbon content was changed to GB/T 5686.5-2008 Ferromanganese, ferromanganese-silicon, nitrogen-bearing ferromanganese and manganese metal. Determination of carbon content. The infrared absorption method, the gasometric method, the gravimetric and the coulometric method.