《BS-EN-ISO-2039-1-1997 BS-2782-3-METHOD-365D-1997.pdf》由会员分享，可在线阅读，更多相关《BS-EN-ISO-2039-1-1997 BS-2782-3-METHOD-365D-1997.pdf（12页珍藏版）》请在三一文库上搜索。
1、BRITISH STANDARD BS EN ISO 2039-1:1997 BS 2782-3: Method 365D:1997 Plastics Determination of hardness Part 1: Ball indentation method The European Standard EN ISO 2039-1:1996 has the status of a British Standard ICS 83.080.01 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:14:13 GMT+00:00
2、2006, Uncontrolled Copy, (c) BSI BS EN ISO 2039-1:1997 This British Standard, having been prepared under the direction of the Chemicals and Materials Sector Board, was published under the authority of the Standards Board and comes into effect on 15 February 1997 BSI 10-1998 The following BSI referen
3、ces relate to the work on this standard: Committee reference PRI/21 Draft announced in BSI Update March 1996 ISBN 0 580 27101 3 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee PRI/21, Testing of plastics, upon which the f
4、ollowing bodies were represented: The British Apparel and Textile Confederation British Plastics Federation Department of the Environment (Building Research Establishment) Department of Trade and Industry (National Physical Laboratory) Electrical and Electronic Insulation Association (BEAMA Ltd.) GA
5、MBICA (BEAMA Ltd.) Institute of Materials Ministry of Defence Packaging and Industrial Films Association PIRA International RAPRA Technology Ltd. Royal Society of Chemistry Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:14:13 GMT+00
6、:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 2039-1:1997 BSI 10-1998i Contents Page Committees responsibleInside front cover National forewordii Foreword2 1Scope3 2Normative reference3 3Definition3 4Principle3 5Apparatus3 6Test specimen3 7Conditioning3 8Procedure3 9Expression of results4 10Test re
7、port4 Annex A (normative) Values of the ball indentation hardness as a function of the depth of penetration and the test load5 Table A.15 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:14:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 2039-1:1997 ii BSI 10-1998 National foreword
8、This British Standard has been prepared by Technical Committee PRI/21 and is the English language version of EN ISO 2039-1:1996 Plastics Determination of hardness Part 1: Ball indentation method, published by the European Committee for Standardization (CEN). It is identical with ISO 2039-1:1993, pub
9、lished by the International Organization for Standardization (ISO). BS EN ISO 2039-1:1997 supersedes BS 2782-3:Method 365D:1991, which is withdrawn. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct
10、 application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 6 and a back cover. This standard has been updated (see copyright d
11、ate) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:14:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 2039-1 October 1
12、996 ICS 83.080 Descriptors: Plastics, ebonite, tests, hardness tests, indentation hardness tests English version Plastics Determination of hardness Part 1: Ball indentation method (ISO 2039-1:1993) Plastiques Dtermination de la duret Partie 1: Mthode de pntration la bille (ISO 2039-1:1993) Kunststof
13、fe Bestimmung der Hrte Teil 1: Kugeleindruckversuch (ISO 2039-1:1993) This European Standard was approved by CEN on 1996-09-07. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard
14、 without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other langu
15、age made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland,
16、 Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1996 Copyright reserved to CEN members R
17、ef. No. EN ISO 2039-1:1996 E Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:14:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 2039-1:1996 2 BSI 10-1998 Foreword The text of the International Standard from Technical Committee ISO/TC 61, Plastics, of the International Organization for
18、 Standardization (ISO) has been taken over as a European Standard by Technical Committee CEN/TC 249, Plastics, the secretariat of which is held by IBN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest
19、 by April 1997, and conflicting national standards shall be withdrawn at the latest by April 1997. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, Fra
20、nce, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:14:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 2039-1:1996 BSI 10-19983 1 Scope This part of
21、 ISO 2039 specifies a method for determining the hardness of plastics and ebonite by means of a loaded ball indenter. The ball indentation hardness determined by this method may provide data for research and development, quality control and acceptance or rejection under specifications. 2 Normative r
22、eference The following standard contains provisions which, through reference in this text, constitute provisions of this part of ISO 2039. At the time of publication, the edition indicated was valid. All standards are subject to revision, and parties to agreements based on this part of ISO 2039 are
23、encouraged to investigate the possibility of applying the most recent edition of the standard indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 291:1977, Plastics Standard atmospheres for conditioning and testing. 3 Definition For the purposes
24、 of this part of ISO 2039, the following definition applies. 3.1 ball indentation hardness the quotient of the load on the ball indenter by the surface area of the impression caused by the ball indenter after a specified time of load application. It is expressed in newtons per square millimetre 4 Pr
25、inciple The method consists of forcing a ball under a specified load into the surface of the test specimen. The depth of impression is measured under load. The surface area of the impression is computed from its depth. The ball indentation hardness is then calculated from the following relationship:
26、 Ball indentation hardness = 5 Apparatus 5.1 The apparatus shall consist essentially of a frame with an adjustable platform fitted with a plate to support the test specimen, an indenter with its associated fittings and a device for applying the load without impact. The apparatus shall be equipped wi
27、th a device to measure the depth of penetration of the indenter with the accuracy indicated in 5.5. 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. 5.2 The indenter shall be made from hardened steel
28、 and shall be polished. The ball shall not show any deformation or damage after the test. The diameter of the ball shall be 5,0 mm 0,05 mm. 5.3 The initial load Fo (tolerance 1 %) shall be 9,8 N. 5.4 The test load Fm (tolerance 1 %) shall have one of the following values: 49,0 N 132 N 358 N 961 N 5.
29、5 The depth measurement range of the apparatus shall be 0,4 mm, measurable to an accuracy of 0,005 mm. 5.6 A timing device, accurate to 0,1 s. 6 Test specimen The test specimen shall be a smooth flat sheet or block of sufficient size to minimize the edge effect on the test result; for example 50 mm
30、50 mm. The surfaces of the test specimen shall be parallel. A thickness of 4 mm is recommended. The supported surface of the test specimen shall not show any deformation after testing. 7 Conditioning The test specimens shall be conditioned, prior to testing, in accordance with ISO 291. 8 Procedure 8
31、.1 Unless otherwise specified, carry out the tests in the standard atmosphere specified in ISO 291. 8.2 Place the test specimen on the supporting plate so that the test specimen is fully supported and its surfaces are perpendicular to the direction of the applied load. Apply the initial load (see 5.
32、3) so that the point of contact of the indenter is not less than 10 mm from the edge of the test specimen. Set the depth-indicating device to zero and then additionally apply the test load Fm (see 5.4). Carry out the loading without impact, over a period of 2 to 3 s. 8.3 Choose the test load Fm from
33、 the specified values to obtain a depth of impression between 0,15 mm and 0,35 mm. Applied load Surface area of impression = Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:14:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 2039-1:1996 4 BSI 10-1998 If the values of the depth of impre
34、ssion after 30 s are outside this range (either in the case of a series of test specimens or in the case of an individual test specimen), change the test load to obtain the correct depth of impression. The number of test measurements which do not give the correct depths of impression shall be report
35、ed. 8.4 Carry out the test in such a manner that any bubbles or cracks in the test specimen do not influence the results. If several determinations are carried out on the same test specimen, ensure that the points of application of the indenter are not less than 10 mm apart from each other and from
36、the edge of the test specimen. 8.5 After 30 s of application of the test load, Fm, measure the depth of impression under load, h1, with the accuracy specified in 5.5. NOTE 1In some cases, it is difficult to obtain test specimens that are exactly flat. If such slightly warped test specimens are used,
37、 part of the measured “depth of impression” will in fact correspond to the distance travelled by the indenter in pressing the test specimen down on to the supporting plate. This difficulty can be overcome by using a supporting plate of diameter 10 mm 1 mm. This diameter is also sufficiently large fo
38、r perfectly flat test specimens. 8.6 Make 10 valid tests on one or more test specimens. 8.7 Determine the deformation of the frame of the apparatus, h2, in millimetres, as follows: Place a soft copper block (at least 6 mm thick) on the supporting plate and apply the initial load Fo. Set the depth-in
39、dicating device to zero and apply the test load Fm. Maintain the test load until the depth indicator is stationary. Note the reading, remove the test load and reset the depth indicator to zero. Repeat this sequence of operations until the reading of the depth indicator is constant after each applica
40、tion of the test load. This represents the point at which no further penetration of the copper block takes place and therefore the constant depth reading is the movement of the depth-indicating device due to the deformation of the frame of the apparatus. Note this constant reading as h2. 9 Expressio
41、n of results 9.1 Calculate the reduced test load, Fr, in newtons, as follows: where NOTE 2The value of hr and the constants are taken from a paper by H.H. Rack and Th. Fett, Materialprfung, 10 (1968) No. 7, p. 226. 9.2 Calculate the ball indentation hardness from the equation where 9.3 For values of
42、 H lower than 250 N/mm2, round off to the nearest 1 N/mm2. For values of H greater than 250 N/mm2, round off to the nearest multiple of 10 N/mm2. 10 Test report The test report shall include the following particulars: a) reference to this International Standard; b) complete identification of the mat
43、erial tested; c) conditioning and conditions under which the tests are carried out; d) description, dimensions and manner of preparation of the test specimens; e) number of tests averaged; f) number of tests which resulted in incorrect depths of impression; g) ball indentation hardness, average valu
44、e and standard deviation. Fmis the test load, in newtons, on the indenter; F r F m = 0,21 hh r () 0,21+ hris the reduced depth of impression ( = 0,25 mm); h1is the depth of impression, in millimetres, under the test load on the indenter; h2is the deformation, in millimetres, of the test apparatus un
45、der the test load; his the depth of impression, in millimetres, after correcting for the deformation of the frame ( = h1 h2). His the ball indentation hardness, in newtons per square millimetre; Fris the reduced test load, in newtons (see 9.1); hris the reduced depth of impression, in millimetres. H
46、 1 5 - - F r h r - -= Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:14:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 2039-1:1996 BSI 10-19985 Annex A (normative) Values of the ball indentation hardness as a function of the depth of penetration and the test load Calculate the ball
47、indentation hardness H using the formula Table A.1 Depth of impression, h Ball indentation hardness, H, (N/mm2) for mmFm = 49,0 NFm = 132 NFm = 358 NFm = 961 N 0,15023,8464,35174,0467,2 0,15522,8061,56166,4446,9 0,16021,8558,99159,5428,3 0,16520,9856,63153,1411,1 0,17020,1754,45147,2395,3 0,17519,42
48、52,44141,8380,7 0,18018,7350,56136,7367,1 0,18518,0848,82132,0354,4 0,19017,4847,19127,6342,6 0,19516,9245,67123,5331,6 0,20016,3944,24119,6321,2 0,20515,8942,90116,0311,5 0,21015,4241,64112,6302,3 0,21514,9840,45109,4293,7 0,22014,5739,33106,3285,5 0,22514,1738,26103,5277,8 0,23013,8037,26100,7270,
49、5 0,23513,4536,3098,2263,6 0,24013,1135,3995,7257,0 0,24512,7934,5393,4250,7 0,25012,4933,7191,2244,7 0,25512,2032,9389,0239,0 0,26011,9232,1887,0233,6 0,26511,6531,4685,1228,4 0,27011,4030,7883,2223,4 0,27511,1630,1281,5218,7 0,28010,9329,5079,8214,1 0,28510,7028,8978,1209,8 0,29010,4928,3276,6205,6 0,29510,2827,7675,1201,6 H 1 5 - F m h r - - 0,21