HB 5421-1998 (English Version) PDF

Scope: This standard specifies the general principles and general rules that must be followed when formulating (revising) and implementing aviation standards for chemical composition analysis methods of metallic materials. This standard is applicable to the formulation (revision) and implementation of chemical composition analysis methods for metals and alloy materials and is applicable to chemical composition analysis methods for other raw materials. The component analysis methods referred to in this standard include chemical methods (gravimetry, titration, spectrophotometry, electrochemical methods), atomic spectrometry (absorption, emission, fluorescence) and gas analysis methods, etc.

HB 5421-1998 history

1970 HB 5421-1998 General rules and general regulations for chemical composition analysis methods of metallic materials
1989 HB 5421-1989 General principles and general provisions of chemical analysis methods for metallic materials
1985 HB 5297.1-1984 General rules and general provisions of chemical analysis methods for titanium alloys
1970 HB 5220.1-1982 Determination of Carbon Content by Coulometric Method for Chemical Analysis of Superalloys