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The method is applicable to types of steel with niobium contents between 0,005 % (m/m) and 1,3 % (m/m). Specifies principle, reagents, apparatus, sampling, procedure, expression of results and test report. Annex A includes additional information on the international co-operative tests. Annex B gives a graphical representation of precision data.

This document specifies a potentiometric titration method for the determination of chromium content in steel and iron. The method is applicable to chromium contents between 1 % (mass fraction) and 35 % (mass fraction). Vanadium contents in steel and iron should be less than 1 % (mass fraction) for chromium contents higher than 10 % (mass fraction) and less than 0,2 % (mass fraction) for chromium contents less than 10 % (mass fraction).

The method specified is applicable to sulfur contents between 0,0003 % (m/m) and 0,010 % (m/m). However, niobium, silicon, tantalum and titanium interfere in the determination of sulfur, and application range and test portion masses of the method depend on the concentration of the interfering elements.