EN ISO 4491-2:1999

Metallic powders - Determination of oxygen content by reduction methods - Part 2: Loss of mass on hydrogen reduction (hydrogen loss) (ISO 4491-2:1997)

Metallpulver - Bestimmung des Sauerstoffanteils durch Reduktionsverfahren - Teil 2: Massenverlust durch Reduktion mit Wasserstoff (ISO 4491-2:1997)

Dieser Teil der ISO 4491 legt ein Verfahren zur Bestimmung des relativen Massenverlustes bei einem Metallpulver fest, das in reinem, trockenem Wasserstoff unter festgelegten Bedingungen erhitzt wird. Ziel dieses Prüfverfahrens ist die Ermittlung einer chemischen Pulverkenngröße, die für die pulvermetallurgische Industrie von Bedeutung ist. Es ist nicht zur Bestimmung des Anteils Elemente gedacht (siehe Anhang A und ISO 4491-1).

Poudres métalliques - Dosage de l'oxygène par les méthodes de réduction - Partie 2: Perte de masse par réduction dans l'hydrogène (perte dans l'hydrogène) (ISO 4491-2:1997)

Metallic powders - Determination of oxygen content by reduction methods - Part 2: Loss of mass on hydrogen reduction (hydrogen loss) (ISO 4491-2:1997)

General Information

• Status: Withdrawn
• Publication Date: 20-Jul-1999
• Withdrawal Date: 25-Apr-2023
• ICS: 77.160 - Powder metallurgy
• Technical Committee: CEN/SS M11 - Powder metallurgy
• Drafting Committee: CEN/SS M11 - Powder metallurgy
• Ref Project: SIST EN ISO 4491-2:2000 - Metallic powders - Determination of oxygen content by reduction methods - Part 2: Loss of mass on hydrogen reduction (hydrogen loss) (ISO 4491-2:1997)

Relations

• Replaced By: EN ISO 4491-2:2023 - Metallic powders - Determination of oxygen content by reduction methods - Part 2: Loss of mass on hydrogen reduction (hydrogen loss) (ISO 4491-2:2023)
• Effective Date: 19-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 4491-2:2000
01-december-2000
Metallic powders - Determination of oxygen content by reduction methods - Part 2:
Loss of mass on hydrogen reduction (hydrogen loss) (ISO 4491-2:1997)
Metallic powders - Determination of oxygen content by reduction methods - Part 2: Loss
of mass on hydrogen reduction (hydrogen loss) (ISO 4491-2:1997)
Metallpulver - Bestimmung des Sauerstoffanteils durch Reduktionsverfahren - Teil 2:
Massenverlust durch Reduktion mit Wasserstoff (ISO 4491-2:1997)
Poudres métalliques - Dosage de l'oxygene par les méthodes de réduction - Partie 2:
Perte de masse par réduction dans l'hydrogene (perte dans l'hydrogene) (ISO 4491-
2:1997)
Ta slovenski standard je istoveten z: EN ISO 4491-2:1999
ICS:
77.160 Metalurgija prahov Powder metallurgy
SIST EN ISO 4491-2:2000 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 4491-2:2000

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SIST EN ISO 4491-2:2000

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SIST EN ISO 4491-2:2000

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SIST EN ISO 4491-2:2000

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SIST EN ISO 4491-2:2000

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SIST EN ISO 4491-2:2000
INTERNATIONAL IS0
STANDARD 4491-2
Second edition
1997-04-01
Metallic powders - Determination of
oxygen content by reduction methods -
Part 2:
Loss of mass on hydrogen reduction
(hydrogen loss)
Poudres m&alliques - Dosage de I’oxyg&ne par /es m&hodes de
kduction -
Partie 2: Perfe de masse par rkduction dans I’hydrogkne (perte dans
I’hydrogene)
Reference number
IS0 4491-2: 1997(E)

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SIST EN ISO 4491-2:2000
ISO 4491-2:1997(E)
Foreword
IS0 (the International Organization for Standardization) is a worldwide
federation of national standards bodies (IS0 member bodies). The work of
preparing international Standards is normally carried out through IS0
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. IS0
collaborates closely with the International Electrotechnical Commission
(IEC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting
a vote.
International Standard IS0 4491-2 was prepared by Technical Committee
ISO/TC 119, Powder metallurgy, Subcommittee SC 2, Sampling and testing
methods for powders (including powders for hardmetals).
This second edition cancels and replaces the first edition (IS0 449102:1989),
table 1 and clause 7 of which have been technically revised.
IS0 4491 consists of the following parts, under the general title Metallic
Determination of oxygen content by reduction methods:
powders -
- Part 1: General guidelines
- Part 2: Loss of mass on hydrogen reduction (hydrogen loss)
- Part 3: Hydrogen-reducible oxygen
- Parf 4: Total oxygen by reduction-extraction
Annex A forms an integral part of this part of IS0 4491.
0 IS0 1997
All rights resewed. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case postale 56 l CH-1211 Geneve 20 l Switzerland
Internet central @ iso.ch
x.400 c=ch; a=4OOnet; p=iso; o=isocs; s=central
Printed in Switzerland
II

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SIST EN ISO 4491-2:2000
~~~
IS0 4491-2: 1997(E)
INTERNATIONAL STANDARD @ IS0
Determination of oxygen content
Metallic powders -
by reduction methods -
Part 2:
Loss of mass on hydrogen reduction (hydrogen loss)
1 Scope
This part of IS0 4491 specifies a method for the determination of the relative loss of mass which a metallic powder
undergoes when heated in a stream of pure dry hydrogen under specified conditions.
The purpose of this test is to evaluate a chemical powder characteristic which is of importance to the powder
metallurgical industry. The test is not intended as a means for the determination of the content of specific elements.
(See annex A and IS0 4491-l .)
The test method is applicable to unalloyed, partially alloyed and completely alloyed powders of the metals listed in
table 1 (see 6.1). It is not applicable to lubricated powders or to mixtures of metal powders.
The results can be influenced by the p
...