ISO 9441:2026

International Standard   Current Edition · Approved on 03 August 2026

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

ISO 9441:2026 Files

English 11 Pages
Current Edition
OMR 31.89

ISO 9441:2026 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).

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