Spectrochemical Determination of Small Amount of Aluminium in Steel

Abstract

The determination of total aluminium in steel is of essential importance because of its vital basis decisive to a series of problem on structure and composition of steel.
A spectrographic analysis applicable to the minute total aluminium (0.005-0.100%) in steelwas established as given hereinunder by means of a combination use of a medium sized quartzspectrograph and a grating spectrograph of Ebert type with an AC intermittent arcsource unit.
Precision in the term of coefficient of variance attained to 3-5%, while accuracy thereofshowed quite comparable to results obtained by wet chemical analysis.
Austenitic grain size was able to be proved by this method in a few hours after ingotmakingwhich was distinguished to ensure the quality of products.