ISO 10138-1991 PDF

Full title and description

ISO 10138:1991 — Steel and iron — Determination of chromium content — Flame atomic absorption spectrometric method. An International Standard that specifies a flame atomic absorption spectrometric (flame AAS) procedure for measuring chromium in non-alloy and low-alloy steels and in iron, intended for chromium contents roughly between 0.002 % (m/m) and 2.0 % (m/m).

Abstract

This standard describes the principle, required reagents and apparatus, sampling and sample preparation, calibration and instrumental criteria, the step‑by‑step analytical procedure and the expression and reporting of results for the determination of chromium in steels and iron using flame atomic absorption spectrometry. Annexes provide procedures for setting instrumental criteria, information from international cooperative tests and graphical presentation of precision data.

General information

• Status: Published (active); edition confirmed 6 September 2017.
• Publication date: 11 April 1991 (April 1991).
• Publisher: ISO — International Organization for Standardization.
• ICS / categories: 77.080.01 — Ferrous metals in general.
• Edition / version: Edition 1 (1991).
• Number of pages: 10.

Scope

Specifies a flame atomic absorption spectrometric method for the determination of chromium in non‑alloy and low‑alloy steels and in iron. The method is applicable to chromium mass fractions in the approximate range 0.002 % to 2.0 % (m/m). The standard covers required references, principle, reagents, apparatus, sampling, analytical procedure, calculation and presentation of results; it also includes annexes on instrumental criteria and precision information from interlaboratory tests.

Key topics and requirements

• Principle of flame atomic absorption spectrometry for chromium determination.
• Specified reagents, preparation of standards and calibration procedures.
• Required laboratory glassware and water quality references (normative references such as ISO 1042 and ISO 3696).
• Sampling and sample preparation for steels and iron (references to ISO 377‑2 where applicable).
• Instrumental settings and criteria; procedures for verification of instrument performance (annex A).
• Precision, accuracy and interlaboratory test information (annexes B and C, including graphical precision data).
• Expression and reporting of results, including units, uncertainty considerations and test report contents.

Typical use and users

Used by metallurgical and materials testing laboratories, steel and iron producers, quality control departments, conformity assessment bodies and research laboratories performing routine or acceptance testing of chromium content in ferrous products. Also used as a reference method for comparative testing and method validation.

Related standards

Replaces ISO 4936:1984 (withdrawn). Normative references within the standard include ISO 1042 (laboratory volumetric flasks), ISO 3696 (water for analytical laboratory use) and ISO 377‑2 (sampling and preparation of samples of wrought steels — Part 2). Related analytical standards include other ISO methods for elemental determination in steels (e.g., alternative methods using ICP or different AAS procedures) and standards produced by ISO/TC 17/SC 1 on chemical composition determination for ferrous metals.

Keywords

ISO 10138, chromium, Cr, flame AAS, flame atomic absorption spectrometry, steel, iron, ferrous metals, chemical analysis, metallurgical testing, method of determination, analytical procedure.

FAQ

Q: What is this standard?

A: ISO 10138:1991 is an International Standard that specifies a flame atomic absorption spectrometric method for determining chromium content in non‑alloy and low‑alloy steels and in iron.

Q: What does it cover?

A: It covers principle, reagents, apparatus, sampling, procedure, calibration and expression of results for chromium determination by flame AAS, plus annexes on instrumental criteria and interlaboratory precision data.

Q: Who typically uses it?

A: Metallurgical testing laboratories, steelmakers, quality control and inspection bodies, and any organization needing a standardized method for measuring chromium in ferrous materials.

Q: Is it current or superseded?

A: The 1991 edition remains the published International Standard; it was confirmed on 6 September 2017. Earlier ISO 4936:1984 was cancelled and replaced by ISO 10138:1991. Users should check with their national standards body or ISO catalogue for the very latest lifecycle status before purchase or citation.

Q: Is it part of a series?

A: ISO 10138 is a standalone method for chromium determination but sits within the body of ISO standards for chemical analysis of ferrous metals and is managed under ISO/TC 17/SC 1 (methods of determination of chemical composition for ferrous metals).

Q: What are the key keywords?

A: Chromium, Cr, flame atomic absorption spectrometry, flame AAS, steel analysis, iron analysis, metallurgical testing, ISO 10138.