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, sample preparation, analysis steps, calculation of analysis results, tolerances, and quality control and requirements for the determination of aluminum content in high-temperature alloys using the EDTA volumetric method. This section applies to the determination of aluminum content in high-temperature alloys. Measuring range: 050% ~ 12.00%.
HB 5220.21-2008 Referenced Document
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
HB 5220.21-2008 history
2008HB 5220.21-2008 Methods for chemical analysis of superalloys.Part 21: Determination of molybdenum content by EDTA volumetric method
1995HB 5220.21-1995 Determination of molybdenum content by EDTA volumetric method for chemical analysis of superalloys
1982HB 5220.21-1982 Determination of Total Rare Earth (Cerium) in Superalloys