BS 903-A57:1997
Physical testing of rubber - Determination of indentation hardness by means of pocket hardness meters

Standard No.

BS 903-A57:1997

Release Date

1997

Published By

British Standards Institution (BSI)

Status

Withdraw 2006-10

Replace By

BS ISO 7619-1:2004

BS ISO 7619-1:2004+A1:2008

BS ISO 7619-2:2004

Latest

BS ISO 7619-1:2004

BS ISO 7619-1:2004+A1:2008

BS ISO 48-5:2018

Scope

1 This International Standard specifies a method for the determination of the indentation hardness of rubber by means of pocket hardness meters of two types: a) the Shore-type durometer; b) a meter calibrated in IRHD. Two types of Shore-type durometer are described; durometer type A is used for rubbers in the normal hardness range and type D for rubbers in the high hardness range. 2 The use of pocket meters is primarily intended for control purposes and is not recommended for specification purposes. For such purposes, the methods given in ISO 48 should be used. It is possible to increase the precision by fixing the pocket hardness tester on a support. 3 A similar method for measuring the hardness of plastics is given in ISO 868:1985, Plastics and ebonite —Determination of indentation hardness by means of a durometer (Shore hardness). NOTE 1 The hardness of rubber, as measured by the Shore A durometer or the IRHD meter, is not a simple fundamental property but is a complex response to an applied indentation. The measurement will depend upon the following factors: a) the elastic modulus of the rubber; b) the viscoelastic properties of the rubber; c) the thickness of the test piece; d) the geometry of the indentor; e) the pressure exerted; f) the rate of increase of pressure; g) the interval at which the hardness is recorded. Because of these factors, results using a Shore A durometer should not be related directly to IRHD values, although correlations have been established for some individual rubbers or compounds.

BS 903-A57:1997 history

• 0000 BS ISO 7619-1:2004
• 1997 BS 903-A57:1997 Physical testing of rubber - Determination of indentation hardness by means of pocket hardness meters