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
31.27
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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