ISO 48

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ISO48...

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July 2003

D EUTSCHE NORM

Rubber, vulcanized or thermoplastic

{

Determination of hardness (hardness between 10 IRHD and 100 IRHD) (ISO 48 : 1994 + Amd. 1 : 1999)

ISO 48

ICS 83.060

Supersedes DIN 53519-1 and DIN 53519-2, May 1972 editions.

Elastomere und thermoplastische Elastomere – Bestimmung der Härte (Härte zwischen 10 IRHD und 100 IRHD) (ISO 48 : 1994 + Amd. 1 : 1999)

This standard incorporates International Standard ISO 48 : 1994 Rubber, vulcanized or thermoplastic – Determination of hardness (hardness between 10 IRHD and 100 IRHD) (including Amendment 1 : 1999). A comma is used as the decimal marker.

National foreword This standard has been prepared by ISO/TC 45 ‘Rubber and rubber products’. The responsible German body involved in its preparation was the Normenausschuss Materialprüfung (Materials Testing Standards Committee), Technical Committee Prüfung der physikalischen Eigenschaften von Kautschuk und Elastomeren. DIN ISO 471 and DIN ISO 4661-1 are the standards corresponding to International Standards ISO 471 and ISO 4661-1, respectively, referred to in clause 2 of the ISO Standard. Amendments DIN 53519-1 and DIN 53519-2, May 1972 editions, have been superseded by the specifications of DIN ISO 48. Previous editions DIN 53519: 1965-01; DIN 53519-1: 1972-05; DIN 53519-2: 1972-05.

Continued overleaf. ISO Standard comprises 15 pages.

© No part of this standard may be reproduced without the prior permission of DIN Deutsches Institut für Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany, has the exclusive right of sale for German Standards (DIN-Normen).

Ref. No. DIN ISO 48 : 2003-07 English price group 11

Sales No. 0411 11.03

Page 1 ISO 48 : 1994 + Amd. 1 : 1999

Rubber, vulcanized or thermoplastic Determination of hardness (hardness between 10 IRHD and 100 IRHD)

Page 2 ISO 48 : 1994 + Amd. 1 : 1999

Page 3 ISO 48 : 1994 + Amd. 1 : 1999

Page 4 ISO 48 : 1994 + Amd. 1 : 1999

Page 5 ISO 48 : 1994 + Amd. 1 : 1999

Page 6 ISO 48 : 1994 + Amd. 1 : 1999

Page 7 ISO 48 : 1994 + Amd. 1 : 1999

One measurement shall be made at a minimum of three different points on the test piece separated from each other by a minimum of 6 mm and the median taken, i.e. the middle value when these are arranged in increasing order.

Page 8 ISO 48 : 1994 + Amd. 1 : 1999

Page 9 ISO 48 : 1994 + Amd. 1 : 1999

Page 10 ISO 48 : 1994 + Amd. 1 : 1999

Page 11 ISO 48 : 1994 + Amd. 1 : 1999

Page 12 ISO 48 : 1994 + Amd. 1 : 1999

Page 13 ISO 48 : 1994 + Amd. 1 : 1999

R

a)

the known relationship1), for a perfectly elastic isotropic material, between indentation D, expressed in hundredths of a millimetre, and Young’s modulus E, expressed in megapascals, viz:

 F  D = 61,5 R− 0,48    E 

0,74

f −    E

0 ,74

  

where F f

1

is the total indenting force, in newtons; is the contact force, in newtons;

) Scott, J. R., Physical Testing of Rubbers, Maclaren and Sons, London, 1995.

Page 14 ISO 48 : 1994 + Amd. 1 : 1999

Page 15 ISO 48 : 1994 + Amd. 1 : 1999

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