This standard specifies the method summary, reagents, analysis steps, drawing of working curves, calculation of analysis results and allowable differences for the determination of niobium content in superalloys by chlorosulfonol C absorbance photometry. This standard is applicable to the determination of niobium content in high-temperature alloys.
HB 5220.34-1995 history
2008HB 5220.34-2008 Methods for chemical analysis of superalloys. Part 34: Determination of niobium content by sulphochlorophenol C photometric method
1970HB 5220.34-1995 Chlorosulfonol C absorptiophotometric method for chemical analysis of superalloys Determination of niobium content