EN ISO 2039-1:1996

SLOVENSKI STANDARD
SIST EN ISO 2039-1:2000
01-maj-2000
3ROLPHUQLPDWHULDOL'RORþDQMHWUGRWHGHO0HWRGDVNURJOLFR,62
Plastics - Determination of hardness - Part 1: Ball indentation method (ISO 2039-1:1993)
Kunststoffe - Bestimmung der Härte - Teil 1: Kugeleindruckversuch (ISO 2039-1:1993)
Plastiques - Détermination de la dureté - Partie 1: Méthode de pénétration a la bille (ISO
2039-1:1993)
Ta slovenski standard je istoveten z: EN ISO 2039-1:1996
ICS:
83.080.01 Polimerni materiali na Plastics in general
splošno
SIST EN ISO 2039-1:2000 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

SIST EN ISO 2039-1:2000

---------------------- Page: 2 ----------------------

SIST EN ISO 2039-1:2000

---------------------- Page: 3 ----------------------

SIST EN ISO 2039-1:2000

---------------------- Page: 4 ----------------------

SIST EN ISO 2039-1:2000
INTERNATIONAL
IS0
STANDAR’D
2039-I
Second edition
1993-02-01
Plastics - Determination of hardness -
Part 1:
Ball indentation method
P/as tiques - Dktermina tion de la duet6 -
Par-tie 7: Mkthode de pkn6tration 8 la bile
Reference number
IS0 2039-I :I 993(E)

---------------------- Page: 5 ----------------------

SIST EN ISO 2039-1:2000
IS0 2039=1:1993(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 2039-l was prepared by Technical Committee
lSO/TC 61, Plastics, Sub-Committee SC 2, Mechanical properties.
This second edition cancels and replaces the first edition
(IS0 2039:1987), of which it constitutes a minor revision. A note has been
added to 8.5 suggesting how to deal with warped test specimens. A note
has also been added to the table in the annex, concerning the test load to
be used in borderline cases. In addition, the text has been updated to bring
it into conformity with current editorial style.
IS0 2039 consists of the following parts, under the general title
P/as tics - Determination of hardness:
- Part 1: Ball indentation method
- Part 2: Rockwell hardness
Annex A forms an integral part of this part of IS0 2039.
0 IS0 1993
All rights reserved. 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 per-
mission in writing from the publisher.
International Organization for Standardization
Case Postale 56 l CH-I 211 Geneve 20 l Switzerland
Printed in Switzerland
ii

---------------------- Page: 6 ----------------------

SIST EN ISO 2039-1:2000
INTERNATIONAL STANDARD IS0 2039=1:1993(E)
- Determination of hardness -
Plastics
Part 1:
Ball indentation method
4 Principle
1 Scope
The method consists of forcing a ball under a speci-
This part of IS0 2039 specifies a method for deter-
fied load into the surface of the test specimen. The
mining the hardness of plastics and ebonite by means
depth of impression is measured under load. The
of a loaded ball indenter.
surface area of the impression is computed from its
The ball indentation hardness determined by this
depth. The ball indentation hardness is then calculated
method may provide data for research and develop- from the following relationship:
ment, quality control and acceptance or rejection un-
Ball indentation hardness =
der specifications.
Applied load
-
-
Surface area of impression
2 Normative reference
5 Apparatus
The following standard contains provisions which,
through reference in this text, constitute provisions
of this part of IS0 2039. At the time of publication, the
5.1 The apparatus shall consist essentially of a
edition indicated was valid. All standards are subject
frame with an adjustable platform fitted with a plate
to revision, and parties to agreements based on this
to support the test specimen, an indenter with its as-
part of IS0 2039 are encouraged to investigate the
sociated fittings and a device for applying the load
possibility of applying the most recent edition of the
without impact.
standard indicated below. Members of IEC and IS0
maintain registers of currently valid International
The apparatus shall be equipped with a device to
Standards.
measure the depth of penetration of the indenter with
the accuracy indicated in 5.5.
- Standard atmospheres for
IS0 291 :I 977, Plastics
conditioning and testing. The frame shall not be deformed under the maximum
load by more than 0,05 mm, the deformation being
measured along the main axis of the applied force.
3 Definition
5.2 The indenter shall be made from hardened steel
and shall be polished. The ball shall not show any de-
For the purposes of this part of IS0 2039, the follow-
formation or damage after the test.
ing definition applies.
The diameter of the ball shall be 5,0 mm + -
ball indentation hardness: The quotient of the
3.1
0,05 mm.
load on the ball indenter by the surface area of the
impression caused by the ball indenter after a speci-
5.3 The initial load F0 (tolerance + 1 %) shall be
fied time of load application. It is expressed in -
9,8 N.
newtons per square millimetre.

---------------------- Page: 7 ----------------------

SIST EN ISO 2039-1:2000
IS0 2039-1:1993(E)
5.4 The test load F, (tolerance & 1 %) shall have
IO mm apart from each other and from the edge of
one of the following values:
the test specimen.
49,0 N-132 N-358 N-961 N
8.5 After 30 s of application of the test load, cm,
measure the depth of impression under load, h,, with
5.5 The depth measurement range of the apparatus
the accuracy specified in 5.5.
shall be 0,4 mm, measurable to an accuracy of
+ 0,005 mm.
-
NOTE 1 In some cases, it is difficult to obtain test speci-
mens that are exactly flat. If such slightly warped test
5.6 A timing device, accurate to + 0,l s. specimens are used, part of the measured “depth of im-
-
pression” will in fact correspond to the distance travelled
by the indenter in pressing the test specimen down on to
6 T
...