ISO 9441:2026Published

Steel — Determination of niobium content — 4-(2-Pyridylazo)-resorcinol (PAR) spectrophotometric method

Aciers — Détermination de la teneur en niobium — Méthode spectrophotométrique au moyen de 4-(2-Pyridylazo)-résorcinol (PAR)

Abstract / scope

This document specifies a spectrophotometric method by using 4-(2-pyridylazo)-resorcinol (PAR) for the determination of niobium in steel. The method is applicable to all types of steel with niobium contents between 0,005 % (mass fraction) and 1,3 % (mass fraction).

Life cycle

Replaces

ISO 9441:1988WithdrawnSteel — Determination of niobium content — PAR spectrophotometric methodInternational Standard · Published 8 Dec 1988 · ISO/TC 17/SC 1