EN ISO 3953:1995
(Main)Metallic powders - Determination of tap density (ISO 3953:1993)
Metallic powders - Determination of tap density (ISO 3953:1993)
The principle of the method specified is tapping a specified amount of powder in a container by means of a tapping apparatus until no further decrease in the volume of the powder takes place. The mass of the powder divided by its volume after the test gives its tap density. By agreement, the tapping may be carried out by hand.
Metallpulver - Bestimmung der Klopfdichte (ISO 3953:1993)
Diese Internationale Norm behandelt ein Verfahren zur Bestimmung der Klopfdichte, d.h. der Dichte eines in einem Gefäß unter bestimmten Bedingungen geklopften Pulvers.
Poudres métalliques - Détermination de la masse volumique après tassement (ISO 3953:1993)
La présente Norme internationale prescrit une méthode pour la détermination de la masse volumique après tassement, c'est-à-dire la masse volumique d'une poudre tassée dans un récipient dans des conditions déterminées.
Metallic powders - Determination of tap density (ISO 3953:1993)
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 3953:2000
01-december-2000
Metallic powders - Determination of tap density (ISO 3953:1993)
Metallic powders - Determination of tap density (ISO 3953:1993)
Metallpulver - Bestimmung der Klopfdichte (ISO 3953:1993)
Poudres métalliques - Détermination de la masse volumique apres tassement (ISO
3953:1993)
Ta slovenski standard je istoveten z: EN ISO 3953:1995
ICS:
77.160 Metalurgija prahov Powder metallurgy
SIST EN ISO 3953:2000 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 3953:2000
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SIST EN ISO 3953:2000
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SIST EN ISO 3953:2000
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SIST EN ISO 3953:2000
INTERNATIONAL
ISO
STANDARD
3953
Third edition
1993-1 O-l 5
Metallic powders - Determination of tap
density
Poudres m&alliques - Dbtermination de Ia masse volumique apr&s
tassemen t
Reference number
ISO 39539 993(E)
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SIST EN ISO 3953:2000
ISO 3953:1993(E)
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. 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, 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.
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 ISO 3953 was prepared by Technical Committee
lSO/rC 119, Powder metallurgy, Sub-Committee SC 2, Sampling and
testing methods for powders (including powders for hardmetals).
This third edition cancels and replaces the second edition
(ISO 3953:1985), in which table2 has been modified.
0 ISO 1993
All rights reserved. No part of this publication may be reproduced or utilized in any form or
by any means, electronie or mechanical, including photocopying and microfilm, without per-
mission in writing from the publisher.
International Organization for Standardization
Case Postale 56 l CH-l 211 Geneve 20 l Switzerland
Printed in Switzerland
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SIST EN ISO 3953:2000
INTERNATIONAL STANDARD ISO 3953:1993(E)
Metallic powders - Determination of tap density
proximately 135 mm. The graduations shall be at
1 Scope
0,2 cm3 intervals.
This International Standard specifies a method for the
A 25 cm’ cylinder shall be used for powders of ap-
determination of tap density, i.e. the density of a
parent density higher than 4 g/cm3, in particular for
powder that has been tapped in a Container under
refractory metal powders, but may also be used for
specified conditions.
powder of lower apparent density.
2 Principle
4.3 Tapping apparatus, which permits the tapping
of the graduated cylinder against a firm base. The
A specified amount of powder in a Container is tapped
by means of a tapping apparatus until no further de- tapping shall be such that a densification of the pow-
der tan take place without any loosening of its surface
crease in the volume of the powder takes place. The
layers. The stroke shall be 3 mm and the tapping fre-
mass of the powder divided by its volume after the
quency shall be between 100 and 300 taps per min-
test gives its tap density.
ute. An example of a tapping apparatus is shown in
By agreement, the tapping may be carried out by
figure 1.
hand.
Alternatively, by agreement only:
3 Symbols
Hard rubber slab (measuring approximately
100 mm x 100 mm x 5 mm).
Table 1
Symbol Meaning Unit 5 Sampling
Tap density
et glcm3
5.1 For the quantities of powder required for each
m Mass of the powder
g
test, see table 2.
V Volume of the tapped powder cm3
Table 2
Cylinder Mass of test
Apparent
4 Apparatus
capacity Portion
density
4.1 Balance, of appropriate capacity and accuracy to
em3 cm 3 9
satisfy the requirements shown in table2.
.
21
100 100 + 0,5
-
4.2 Graduated glass cylinder, calibrated to contain
-
100 cm3, the height of the graduated Portion being
approximately 175 mm. The graduations shall be at
>7
1 cm3 intervals, thus allowing a measuring accuracy 25 100 + - 0,5
of * 0,5 cm3.
>2to7
25 50 + 0,2
-
0,8 to 2 25
20 + 0,l
-
Alternatively:
< 0,8
25 10 + 0,l
Graduated glass cylinder
...
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