HB 5220.8-2008 (English Version) PDF

Scope: WARNING—Personnel using this section should have practical experience in regular laboratory work. This section does not address all possible safety issues. Users are responsible for taking appropriate safety and health measures and complying with the conditions stipulated in relevant national regulations. This part specifies the principles, reagents, instruments, sample preparation, analysis steps, calculation of analysis results, tolerances, and quality control and requirements for the determination of phosphorus content in superalloys using n-butanol-chloroform extraction absorbance photometry. This section applies to the determination of phosphorus content in high-temperature alloys. Measuring range: 0.001% ~ 0.05%.

HB 5220.8-2008 Referenced Document

GB/T 7729 Chemical analysis of metallurgical products—General rule for spectrophotometric methods*， 2021-08-20 Update
HB 5421 General rules and general regulations for chemical composition analysis methods of metallic materials
HB/Z 205 Specification for sampling of specimens for chemical analysis of steels and superalloys

2008 HB 5220.8-2008 Methods for chemical analysis of superalloys.Part 8: Determination of phosphorus content by n-butyl alcohol-chloroform extraction photometric method
1970 HB 5220.8-1995 Chemical Analysis Methods of Superalloys-N-Butanol-Chloroform Extraction-Absorptiometry for Determination of Phosphorus Content
1970 HB 5220.8-1982 Determination of vanadium content in superalloy