EN 27526:1991
(Main)Nickel, ferronickel and nickel alloys - Determination of sulphur content - Infra-red absorption method after induction furnace combustion (ISO 7526:1985)
Nickel, ferronickel and nickel alloys - Determination of sulphur content - Infra-red absorption method after induction furnace combustion (ISO 7526:1985)
Applies to the determination of sulfur content of nickel and ferronickel in the range 0,001 to 0,3 % (m/m), and of nickel alloys in the range 0,001 to 0,1 % (m/m). Specifies principle, reagents and materials, apparatus, sampling and samples, procedure, expression of results, some notes and test report. Examples of compositions of nickel, ferronickel and nickel alloy are given in annex A.
Nickel, Ferronickel und Nickellegierungen - Bestimmung des Schwefelgehaltes - Verfahren der Infrarotabsorption nach Verbrennung im Induktionsofen (ISO 7526:1985)
Nickel, ferro-nickel et alliages de nickel - Dosage du soufre - Méthode par absorption dans l'infrarouge après combustion dans un four à induction (ISO 7526:1985)
La présente Norme internationale spécifie une méthode par absorption dans l'infrarouge après combustion, pour le dosage du soufre à des teneurs comprises entre 0,001 et 0,3 % (m/m) dans le nickel et le ferro-nickel et à des teneurs comprises entre 0,001 et 0,1 % (m/m) dans les alliages de nickel. Des exemples de composition sont donnés dans l'annexe A. N0TE -- Il devrait être possible d'appliquer cette méthode dans la gamme comprise entre 0,000 2 et 0,001 % (m/m). On ne dispose toutefois pas de suffisamment de résultats d'essais de laboratoires pour inclure cette faible teneur dans l'objet.
Nikelj, feronikelj in nikljeve zlitine - Določevanje žvepla - Metoda infrardeče absorpcije po zgorevanju v indukcijski peči (ISO 7526:1985)
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Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 27526:2009
01-november-2009
1LNHOMIHURQLNHOMLQQLNOMHYH]OLWLQH'RORþHYDQMHåYHSOD0HWRGDLQIUDUGHþH
DEVRUSFLMHSR]JRUHYDQMXYLQGXNFLMVNLSHþL ,62
Nickel, ferronickel and nickel alloys - Determination of sulphur content - Infra-red
absorption method after induction furnace combustion (ISO 7526:1985)
Nickel, Ferronickel und Nickellegierungen - Bestimmung des Schwefelgehaltes -
Verfahren der Infrarotabsorption nach Verbrennung im Induktionsofen (ISO 7526:1985)
Nickel, ferro-nickel et alliages de nickel - Dosage du soufre - Méthode par absorption
dans l'infrarouge après combustion dans un four à induction (ISO 7526:1985)
Ta slovenski standard je istoveten z: EN 27526:1991
ICS:
77.120.40 Nikelj, krom in njune zlitine Nickel, chromium and their
alloys
SIST EN 27526:2009 en,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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Foreword
ISO (the International Organization for Standardization) is a worldwide federation of
national Standards bodies (ISO member bedies). The work of preparing International
Standards is normally carried out through ISO technical committees. Esch 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, govern-
mental and non-governmental, in liaison with ISO, also take part in the work.
Draft International Standards adopted by the technical committees are circulated to
the member bodies for approval before their acceptance as International Standards by
the ISO Council. They are approved in accordance with ISO procedures requiring at
least 75 % approval by the member bodies voting.
International Standard ISO 7526 was prepared by Technical Committee ISO/TC 155,
Nickel and nicke/ alloys.
Users should note that all International Standards undergo revision from time to time
and that any reference made herein to any other International Standard implies its
latest edition, unless otherwise stated.
0
International Organkation for Standardization, 1985
Printed in Switzerland
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ISO 75264985 (E)
INTERNATIONAL STANDARD
Nickel, ferronickel and nicke1 alloys - Determination
of Sulfur content - Infra-red absorption method after
induction furnace combustion
4.5 Crucibles and lids.
1 Scope and field of application
This International Standard specifies an infra-red absorption
4.51 Ceramic crucibles shall be of precise dimensions so that
method after combustion for the determination of the Sulfur
the Sample is positioned correctly in the induction coil of the
content of nicke1 and ferronickel in the range 0,001 to 0,3 %
furnace (sec 9.1).
(mlm), and of nicke1 alloys in the range 0,001 to 0,l % (mlm).
Examples of compositions are given in annex A.
4.5.2 Pre-ignite the crucibles in air or Oxygen in a furnace for
not less than 1 h at 1 100 OC and store in a desiccator or closed
NOTE - lt may be possible to apply this method in the range 0,000 2
Container. A resistance furnace with a combustion tube
to 0,001 % (mlm). However, there were insuff icient laboratory test
data to support the inclusion of this lower level in the scope. through which a flow of Oxygen Passes may be used. Crucible
lids, used to help retain the solid Oxidation products in the hot
Zone, are pre-ignited in a similar manner.
2 References 4.6 Fluxes: Low Sulfur tin, topper plus tin, topper or
vanadium pentoxide (see 9.2).
ISO 5725, Precision of test methods - Determination of
repea tability and reproducibility b y in ter-labora tory tests.
4.7 Accelerators : Low Sulfur topper, iron, tungsten or
nicke1 (see 9.2).
Determination of Sulfur con ten t -
ISO 7525, Nickel -
Methylene blue molecular absorption spectrometric method
4.8 Nickel, low Sulfur of known value [
after genera tion of h ydrogen sulfide.
4.9 Standard reference steels, containing 0,l to
0,2 % (mlm) Sulfur.
3 Principle
Combustion of a test Portion in a flow of Oxygen at a high
temperature in a high frequency induction furnace in the
5 Apparatus
presence of fluxes and accelerators.
The apparatus required for combustion in a high frequency in-
Measurement of the Sulfur dioxide formed using an infra-red
duction furnace and the subsequent infra-red absorption
analyser and an integration procedure.
measurement of the evolved Sulfur dioxide may be obtained
commercially from a number of manufacturers. Follow the
manufacturer’s instructions for the Operation of the equipment.
A pressure regulator is required to control the Oxygen pressure
to the furnace according to the manufacturer’s specification
4 Reagents and materials
(usually 28 kN/m2). Features of commercial equipment are
given in annex B.
4.1 Oxygen (O$, 99,5 % Hrn) minimum.
4.2 Ascarite or soda lime, 0,7 to 1
...
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