Oceli - Stanovení dusíku (stopová množství) - Spektrofotometrická metoda (Norma k přímému použití jako ČSN).
NORMA vydaná dňa 1.12.2024
Označenie normy: ČSN EN 10179
Rozlišovací znak: 420525
Katalógové číslo: 520068
Dátum vydania normy: 1.12.2024
Počet strán: 20
Približná hmotnosť: 60 g (0.13 libier)
Krajina: Česká technická norma
Kategória: Technické normy ČSN
This document specifies a spectrophotometric method for the determination of nitrogen in steels.
The method is primarily intended for the determination of total nitrogen in very low contents in non-alloy steels.
It can 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. These highly resistant nitrides have 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 0,000 5 % (by mass) to 0,005 % (by mass).
The precision data of the present method are given in Annex A