NF EN ISO 4937

NF EN ISO 4937

December 2024
Standard Current

Steel and iron - Determination of chromium content - Potentiometric or visual titration method

This document specifies a method for the determination of chromium in steel and iron by potentiometric or visual titration.The method is applicable to chromium contents between 0,25 % (mass fraction) and 35 % (mass fraction). If vanadium is present, the visual titration is applicable only to test portions containing less than 3 mg of vanadium.NOTE   The visual titration can be applicable to test portion containing between 3 mg and 6 mg of vanadium.

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Main informations

Collections

National standards and national normative documents

Publication date

December 2024

Number of pages

22 p.

Reference

NF EN ISO 4937

ICS Codes

77.080.01   Ferrous metals in general

Classification index

A06-329

Print number

1

International kinship

ISO 4937:2024

European kinship

EN ISO 4937:2024
Sumary
Steel and iron - Determination of chromium content - Potentiometric or visual titration method

This document specifies a method for the determination of chromium in steel and iron by potentiometric or visual titration.

The method is applicable to chromium contents between 0,25 % (mass fraction) and 35 % (mass fraction). If vanadium is present, the visual titration is applicable only to test portions containing less than 3 mg of vanadium.

NOTE   The visual titration can be applicable to test portion containing between 3 mg and 6 mg of vanadium.

Replaced standards (1)
NF EN 24937
September 1990
Standard Cancelled
Steel and iron. Determination of chromme content. Potentiometric or visual titration method.

The method is applicable to chromium contents between 0.25 % (m/m) and 35 % (m/m). Specifies principle, reagents, apparatus, sampling, procedure, expression of results and test report. Annex A gives additional information on the international co-operative tests, and Annex B represents the precision data graphically.

Table of contents
  • 1 Domaine d'application
  • 2 Références normatives
  • 3 Termes et définitions
  • 4 Principe
  • 5 Réactifs
  • 6 Appareillage
  • 7 Prélèvement et préparation des échantillons
  • 8 Mode opératoire
  • 9 Expression des résultats
  • 10 Rapport d'essai
  • A Informations supplémentaires sur les essais de fidélité interlaboratoire internationaux
  • B Représentation graphique des données de fidélité
  • Bibliographie
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