ISO/TR 9769:2018
(Main)Steel and iron — Review of available methods of analysis
Steel and iron — Review of available methods of analysis
This document gives guidelines for the determination of the chemical composition of steel and iron by reference to published International Standards, including their range of application and principles of the methods. Graphical representation of the precision data precision data for the methods is given in Annex A. The list of International Standards is summarized in Annex B.
Aciers et fontes — Vue d'ensemble des méthodes d'analyse disponibles
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TECHNICAL ISO/TR
REPORT 9769
Fourth edition
2018-12
Steel and iron — Review of available
methods of analysis
Aciers et fontes — Vue d'ensemble des méthodes d'analyse disponibles
Reference number
©
ISO 2018
© ISO 2018
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ii © ISO 2018 – All rights reserved
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 International Standards for determining the chemical composition of steel and
iron, their range of application and principles of the methods . 1
4.1 Mono-elemental methods. 1
4.1.1 Aluminium, Al . 1
4.1.2 Antimony, Sb . 2
4.1.3 Arsenic, As . 2
4.1.4 Boron, B . 2
4.1.5 Calcium, Ca . 3
4.1.6 Carbon, C . 4
4.1.7 Chromium, Cr . 5
4.1.8 Cobalt, Co . 6
4.1.9 Copper, Cu . 7
4.1.10 Manganese, Mn . 8
4.1.11 Molybdenum, Mo . 9
4.1.12 Nickel, Ni .10
4.1.13 Niobium, Nb .12
4.1.14 Nitrogen, N .13
4.1.15 Oxygen, O .14
4.1.16 Phosphorus, P .14
4.1.17 Sulfur, S .15
4.1.18 Silicon, Si .17
4.1.19 Tin, Sn .18
4.1.20 Titanium, Ti .18
4.1.21 Tungsten, W .19
4.1.22 Vanadium, V .19
4.2 Multi-elemental methods .20
4.2.1 Calcium, Ca; Magnesium, Mg .20
4.2.2 Carbon, C; Sulfur, S .21
4.2.3 Tin, Sn; Antimony, Sb; Cerium, Ce; Lead, Pb; Bismuth, Bi .21
4.2.4 Chromium, Cr; Cobalt, Co; Copper, Cu; Manganese, Mn; Molybdenum, Mo;
Nickel, Ni; Niobium, Nb; Phosphorus, P; Silicon, Si; Titanium, Ti; Vanadium, V .21
4.2.5 Zinc, Zn; Aluminium, Al; Nickel, Ni; Iron, Fe; Silicon, Si; Lead, Pb . .22
4.2.6 Carbon, C; Silicon, Si; Manganese, Mn; Phosphorus, P; Sulfur, S; Chromium,
Cr; Nickel, Ni; Aluminium, Al; Titanium, Ti; Copper, Cu: .23
4.3 General documents.24
Annex A (informative) Graphical representation of precision data for the methods
presented in this document .25
Annex B (informative) Summary of the International Standards presented in this document .77
Bibliography .82
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso
.org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 17, Steel, Subcommittee SC 1, Methods of
determination of chemical composition.
This fourth edition cancels and replaces the third edition (ISO/TR 9769:1991), which has been
technically revised to update all the standard methods for the determination of chemical composition
of steel and iron.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/members .html.
iv © ISO 2018 – All rights reserved
TECHNICAL REPORT ISO/TR 9769:2018(E)
Steel and iron — Review of available methods of analysis
1 Scope
This document gives guidelines for the determination of the chemical composition of steel and iron by
reference to published International Standards, including their range of application and principles of
the methods.
Graphical representation of the precision data precision data for the methods is given in Annex A.
The list of International Standards is summarized in Annex B.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https: //www .iso .org/obp
— IEC Electropedia: available at http: //www .electropedia .org/
3.1
routine method
method calibrated against reference materials, certified reference materials or against standard
solutions commercially available that is widely used for control purposes (day-to-day analysis)
4 International Standards for determining the chemical composition of steel and
iron, their range of application and principles of the methods
4.1 Mono-elemental methods
4.1.1 Aluminium, Al
Document: ISO 9658:1990, Steel — Determination of aluminium content — Flame atomic absorption
spectrometric method.
Range of application:
— determination of acid-soluble and/or total aluminium contents between a mass fraction of
0,005 % and a mass fraction of 0,20 % in non-alloyed steel.
Principle of the method:
a) dissolution of a test portion in dilute hydrochloric and nitric acids;
b) fusion of the acid-insoluble material with a mixture of orthoboric acid and potassium carbonate;
c) spraying of the solution into a dinitrogen monoxide-acetylene flame;
d) spectrometric measurement of the atomic absorption of the 309,3 nm spectral line emitted by an
aluminium hollow cathode lamp.
4.1.2 Antimony, Sb
Document: ISO 10698:1994, Steel — Determination of antimony content — Electrothermal atomic
absorption spectrometric method.
Range of application:
— determination of the antimony content between a mass fraction of 0,000 5 % and a mass fraction of
0,010 % in steel.
Principle of the method:
a) dissolution of a test portion in hydrochloric and nitric acids and dilution of the solution to a
known volume;
b) introduction of a known volume of the solution into an electrothermal atomizer of an atomic
absorption spectrometer;
c) measurement of the atomic absorption of the 217,6 nm spectral resonance line energy emitted by
an antimony lamp, using background correction;
d) calibration by the standard additions technique.
4.1.3 Arsenic, As
Document: ISO 17058:2004, Steel and iron — Determination of arsenic content — Spectrophotometric
method.
Range of application:
— determination of the arsenic content between 0,000 5 % (mass fraction) and 0,10 % (mass fraction)
in steel and iron.
Principle of the method:
a) dissolution of a test portion in a hydrochloric acid and nitric acid mixture;
b) prolonged heating with sulfuric acid until white fumes are given off;
c) reduction of arsenic in the presence of hydrazine sulfate and potassium bromide, then separation
by distillation as the trivalent chloride, absorbed in the nitric acid solution, in which the As(III) is
oxidized back to the pentavalent state As(V);
d) formation of the molybdenum blue complex between ammonium molybdate and arsenic, which is
reduced by hydrazine sulfate;
e) spectrophotometric measurement at a wavelength of approximately 840 nm.
4.1.4 Boron, B
4.1.4.1 Document: ISO 10153:1
...
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