99.60 Withdrawal effective Jun 19, 2024
CEN
CEN/TC 459/SC 2 Methods of chemical analysis for iron and steel
European Norm
77.040.30 Chemical analysis of metals
This EURONORM specifies a method for the spectrophotometric determination of nitrogen in steels.
The method is primarily intended for the determination of total nitrogen in very low nitrogen non-alloy steels. It may be used, however, for any low nitrogen ferrous alloy that is soluble in hydrochloric acid provided that the acid-resistant form of silicon nitride is not present. This highly resistant nitride has been found only in samples of silicon steels manufactured without aluminium addition and then only in sheet material.
The method is applicable to nitrogen contents from 0,0005 to 0,005 % (m/m).
NOTE The method has also been successfully applied to a pure iron with a nitrogen content of 0,0038 % (m/m) - see Annex.
WITHDRAWN
EN 10179:1989
99.60
Withdrawal effective
Jun 19, 2024
PUBLISHED
EN 10179:2024