BS-903-A57-1997 ISO-7619-1997.pdf
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1、BRITISH STANDARD BS 903-A57: 1997 ISO 7619:1997 Physical testing of rubber Part A57: Determination of indentation hardness by means of pocket hardness meters ICS 83.060 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 04:57:25 GMT+00:00 2006, Uncontrolled Copy, (
2、c) BSI BS 903-A57:1997 This British Standard, having been prepared under the direction of the Sector Board for Materials and Chemicals, was published under the authority of the Standards Board and comes into effect on 15 August 1997 BSI 02-1999 ISBN 0 580 27875 1 National foreword This British Stand
3、ard reproduces verbatim ISO 7619:1997 and implements it as the UK national standard. It supersedes BS 903-A57:1989 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee PRI/22, Physical testing of rubber, which has the responsibility to: aid enquirers to un
4、derstand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented
5、on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Ind
6、ex”, or using the “Find” facility of the BSI Standards Electronic Catalogue. Additional information The “standard temperature” referred to in clause 6 is the standard laboratory temperature, which in the UK is 23 C 2 C. For further information in relation to that given in the “Note” to subclause 1.3
7、 see: A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comp
8、rises a front cover, an inside front cover, pages i and ii, the ISO title page, page ii, pages 1 to 6 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. 1.BROWN R.P.P
9、hysical testing of rubber. Elsevier Applied Science. 2.OBERTO S.Rubber Chemistry and Technology. 1955, 28, 1054. 3.JUNE A.E.Rubber Chemistry and Technology. 1957, 30, 367. Amendments issued since publication Amd. No.DateComments Licensed Copy: London South Bank University, London South Bank Universi
10、ty, Fri Dec 08 04:57:25 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 903-A57:1997 BSI 02-1999i Contents Page National forewordInside front cover Forewordii 1Scope1 2Normative references1 3Principle1 4Apparatus1 5Test piece3 6Conditioning3 7Procedure3 8Calibration3 9Precision5 10Test report5 Annex A
11、 (informative) Guidance for using precision results6 Figure 1 Indentor for type A durometer2 Figure 2 Indentor for type D durometer2 Figure 3 Apparatus for calibration of durometer spring4 Table 1 Type 1 precision for a Shore hardness meter5 Licensed Copy: London South Bank University, London South
12、Bank University, Fri Dec 08 04:57:25 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 04:57:25 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: London South Bank University, London South Bank University
13、, Fri Dec 08 04:57:25 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 903-A57:1997 ii BSI 02-1999 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 carr
14、ied out through ISO 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.
15、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 ap
16、proval by at least 75 % of the member bodies casting a vote. International Standard ISO 7619 was prepared by Technical Committee ISO/TC 45, Rubber and rubber products, Sub-Committee SC 2, Physical and degradation tests. This second edition cancels and replaces the first edition (ISO 7619:1986). The
17、main modifications with respect to the first edition are the following: a new note (note 1) has been added to clause 1, this note replacing the second paragraph of clause 3; in 4.1.4 b), the equation has been modified; in 4.2.3 and 4.2.4, the minimum hardness for calibration of the durometer has bee
18、n changed from 25 IRHD to 30 IRHD; a footnote relating to 8.1 has been added; a footnote relating to 8.2.2 has been added; a new clause (clause 9) on the precision of the test method has been added between the clauses on “Calibration” and “Test report” (now clause 10); a new annex (Annex A ) on guid
19、ance for using precision results has been added. Annex A of this International Standard is for information only. Descriptors: Rubber, tests, mechanical tests, hardness tests, indentation hardness tests, test equipment. Licensed Copy: London South Bank University, London South Bank University, Fri De
20、c 08 04:57:25 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 903-A57:1997 BSI 02-19991 WARNING Persons using this International Standard should be familiar with normal laboratory practice. This standard does not purport to address all of the safety problems, if any, associated with its use. It is the
21、 responsibility of the user to establish appropriate safety and health practices and to ensure compliance with any national regulatory conditions. 1 Scope 1.1 This International Standard specifies a method for the determination of the indentation hardness of rubber by means of pocket hardness meters
22、 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. 1.2 The use of pocket meters is primarily intended for cont
23、rol 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. 1.3 A similar method for measuring the hardness of plastics is given in ISO 868:1
24、985, Plastics and ebonite Determination of indentation hardness by means of a durometer (Shore hardness). NOTE 1The 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 wi
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