1、STD-BSI BS EN IS0 2037-2-ENGL 2000 lb24bb9 OBLib993 427 W BRITISH STANDARD Plastics - Determination of hardness - Part 2: Rockwell hardness The European Standard EN IS0 2039-2:1999 has the status of a British Standard IMPORTANT NOTE. Before reading this method it is essential to read BS 2782-0, Intr
2、oduction, issued separately. ICs 83.080.01 BS EN IS0 2 O 3 9-2 :2 O00 BS 2782-3: Method 365C:1992 Incorporating Amendment No. 1 to Method 365C:1992 (renumbers the BS as BS EN IS0 BS 2782-3: 2039-2i2000) NO COPYING WITBOUT BSI pEpMI8SION EXCEPT AS BY COPYBGET LAW Copyright European Committee for Stan
3、dardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Plastics and Rubber Standards Policy Committee (PRMI-) t
4、o Technical Committee PRMI21, upon which the following bodies were represented: British Plastics Federation British Steel Industry British Telecommunications plc British Textile Confederation Department of Trade and Industry (National Physical Laboratory) EEA (the Association of Electronics, Telecom
5、munications and Business Electrical and Electronic Insulation Association (BEAMA Ltd.) Electrical Installation Equipment Manufacturers Association (BEAMA Ltd.) GAMBICA (BEAMA Ltd.) Ministry of Defence PIRA Packaging and Industrial Films Association Plastic Industrial Containers Association Plastics
6、and Rubber Institute RAPRA Technology Ltd. Yarsley Technical Centre Ltd. Equipment Industries) Standards Board and comes into effect on bd. N. This British Standard, having been prepared under the direction of the Plastics and Rubber Standards Policy Committee, was published Amendments issued since
7、publication Comments 10694 28 February 1992 8 BSI 05-2000 The foiowing BSI references relate to the work on this standard: Committee reference PW21 Draft for comment 85142714 DC ISBN O 580 80515 O May 2000 Renumbering BS 2782-3:Method 365C:1992 as BS EN IS0 2039-2:2000 Copyright European Committee f
8、or Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-STD.BSI BS EN IS0 2037-2-ENGL 2000 Lb2qbbS 064b5 2TZ W BS EN IS0 2039-2:2000 Contents Page Committees responsible Inside front cover National foreword 11 1 Scop
9、e and field of application 1 2 References 1 3 Principle 1 4 Apparatus 5 Test specimen 6 Conditioning 1 2 2 7 Procedure 2 8 Expression of result 3 9 Testreport 3 Annex A Determination of Rockwellzr hardness Bibliography 5 Annex ZA Normative references to international publications with their relevant
10、 European publications 6 4 8 BSI 06-2000 i Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-STD-BSI BS EN IS0 2039-2-ENGL 2000 Lb2qbb9 0i.lbb 138 D BS EN IS0 2039-2:2000 National
11、foreword This British Standard is the official English language version of EN IS0 2039-2:1999. It is identical to IS0 2039-2:1987. It is dual numbered as BS 2782-3:Method 365C:1992. This method has been prepared under the direction of the Plastics and Rubber Standards Policy Committee and is identic
12、al with IS0 2039-21987 ?Plastics - Determination of hardness - Part 2 : Rockwell hardness?, published by the International Organization for Standardization (ISO). It supersedes BS 2782: Method 365C31986 which is withdrawn. Cross-references The British Standards which implement international or Europ
13、ean publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled ?International Standards Correspondence Index? or by using the ?Find facility of the BSI Standards Electronic Catalogue. The Technical Committee has reviewed the provisions of IS0 48:
14、1979 to which reference is made in the text, and has decided that they are acceptable for use in conjunction with this standard. WARNING NOTE. This British Standard method, which is identical with IS0 2039-2, does not necessarily detail all the precautions necessary to meet the requirements of the H
15、ealth and Safety at Work etc. Act 1974. Attention should be paid to any appropriate safety precautions and the method should be operated only by trained personnel. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible fo
16、r their correct 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 IS0 title page, the EN IS0 foreword, pages 1 to 6, an inside back cover and
17、 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. _. 11 8 BSI 05-2000 Copyright European Committee for Standardization Provided by IHS under license with CENNot for Res
18、aleNo reproduction or networking permitted without license from IHS-,-,- STD-BSI BS EN IS0 2039-2-ENGL 2000 Lb24bb9 OBLib777 079 = UROPEAN STANDARD EN IS0 2039-2 NORME EUROPENNE EUROPISCHE NORM June 1999 English version Plastics - Determination of hardness - Part 2: Rockwell hardness (IS0 2039-2: 19
19、87) Plastiques - Dtermination de la duret - Partie 2: Duret Rockwell Kunststoffe - Bestimmung der Hrte - Teil 2: Rockwelhrte (IS0 2039-2:1987) (IS0 2039-21987) This European Standard was approved by CEN on 6 May 1999. CEN members are bound to comply with the CENICENELEC Internal Regulations which si
20、tpulate the conditions for giving this European Standard the status of a national standard 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
21、 exists in three official versions (English, French, German). A version in any other language 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 standard
22、s bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalization Europisches Komittee f
23、r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels O 1999 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref No. EN IS0 2039-2:1999 E Copyright European Committee for Standardization Provided by IHS under license with CENNot f
24、or ResaleNo reproduction or networking permitted without license from IHS-,-,-STD-BSI BS EN IS0 2039-2-ENGL 2000 = Lb2ilbb9 08qb778 TOO EN IS0 2039-2:1999 Foreword to EN IS0 2039-2:1999 The text of the International Standard from Technical Committee ISO/TC 61, Plastics, of the International Organiza
25、tion for 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 th
26、e latest by December 1999, and conflicting national standards shall be withdrawn at the latest by December 1999. According to the CENKENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Re
27、public, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. NOTE Normative references to Internationals Standards are listed in Annex ZA (normative). 8 BSI 05-2000 Copyright European Committ
28、ee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-STD-BSI BS EN IS0 2039-2-ENGL 2000 D Lb24bb9 084b997 947 9 EN IS0 2039-2:1999 1 Scope and field of application 1.1 This part of IS0 2039 specifies a method
29、for determining the indentation hardness of plastics by means of the Rockwell hardness tester using the Rockwell M, L and R hardness scales. 1.2 A Rockwell hardness number is directly related to the in dentation hardness of a plastic material; the higher the Rockwell hardness number, the harder the
30、material. Due to a short overlap of Rockwell hardness scales by this procedure, two different Rockwell hardness numbers of different scales may be obtained on the same material, both of which may be technically correct. 3.2 Each Rockwell hardness scale division represents 0,002 mm vertical movement
31、of the indentor. In practice, the Rockwell hardness number is derived from the following relationship: where HR= 130-e HR e is the Rockwell hardness number; is the depth of impression after removal of the major load, in units of 0,002 mm. NOTE This relationship only holds for the E, M, Land R scales
32、. 4 Apparatus _ 1.3 For materials having high creep and recovery, the time-factors involved in application of the major and minor loads have a considerable effect on the 4.1 The apparatus is a standard Rockwell hardness tester which comprises essentially results of the measurements. 1.4 An alternati
33、ve method of using the apparatus to give hardness on the Rockwell-a hardness scale is specified in the annex which shows how this scale may be related to the hardness measurement of IS0 2039-1. 2 References IS0 48, Rubber, vulcanized - Determination of hardness (Hardness between 10 and 100 IRHD). IS
34、0 291, Plastics - Standard atmospheres for conditioning and testing. IS0 868, Plastics - Determination of indentation hardness by means of a durometer (Shore hardness). IS0 2039-1, Plastics - Determination of hardness -Part 1: Ball indentation method. 3 Principle 3.1 This is a method for determining
35、 hardness in which a constant minor load is applied to a steel ball resting on the material to be tested, followed by application of a major load, and then followed by a return to the same minor load, all at specified limits for times of loading, The actual measurement is based on the total depth of
36、 penetration, minus the elastic recovery after a fixed time following removal of the major load, minus the penetration resulting from the minor load. The Rockwell hardness number is derived from the net increase in depth of impression as the load on an indentor is increased from a fixed minor load t
37、o a major load and then returned to the same minor load. - a rigzd frame supporting an adjustable platform fitted with a plate at least 50 mm in diameter to support the test specimen; - an indentor with its associated fittings; - a device for applying the appropriate loads to the indentor without im
38、pact. 4.2 The indentor comprises a polished hardened steel ball which rolls freely in its housing. The ball shall not deform during the test or show damage after a test. The diameter of the indentor depends upon the Rockwell scale in use (see 4.6). 4.3 The indentor is equipped with a dial gauge or o
39、ther suitable device to measure the depth of penetration of the indentor to within 0,001 mm. It is desirable but not essential for the dial gauge to be calibrated in Rockwell hardness numbers (one Rockwell scale division = 0,002 mm). When the machine is so directly calibrated, it is usual for the di
40、al gauge to have a black and a red scale, the latter allowing automatically for the constant of 130 in the derivation of Rockwell hardness number on the M, L and R scales (see 3). Alternative means of measurement of penetration and display of data may be used, provided that the accuracy is at least
41、equal to that of the dial gauge. )At present at the stage of draft. (Revision of IS0 48:1979, IS0 1400:1975 and IS0 1818:1976.) O BSI 05-2000 1 Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license
42、 from IHS-,-,-STD.BS1 BS EN IS0 2039-2-ENGL 2000 Lb24bb9 0847000 2b7 EN IS0 2039-2:1999 Minor load Major load IN N 98,07 588,4 98,07 588,4 1 98,07 980,7 98,07 980,7 4.4 The appropriate loads for the M, L and R scales are as given in 4.5. In each case the minor load is 98,07 N. Provision is usually m
43、ade in the Rockwell machine to apply the minor load to the specimen by means of a screw capstan which raises the platform supporting the test specimen until the latter contacts the indentor. In these circumstances the dial gauge has an indicated point to show when the minor load has been fully appli
44、ed; reference should be made to the manufacturers hand-book before operating the machine. The adjustment of speed of load-application is of great importance. Adjust the dash-pot on the Rockwell tester so that the operating handle completes its travel in 4 to 5 s with no specimen on the machine or no
45、 load applied by the indentor to the anvil. The major load shall be 980,7 N for this calibration. 4.5 The major and minor loads and indentor diameters for the Rockwell scales are as follows: Rockwell Hardness scale R L M E I Indentor diameter 12,7 f, 6,35 f, 6,35 f, 3,175 f, Both the major and minor
46、 loads shall be accurate to within 2 %. NOTE The E scale is used for calibration only for the purpose of thia International Standard. 4.6 The machine should be mounted on a level, rigid base free from vibration. If the machine mounting is unavoidably subjected to vibration (for example, in the vicin
47、ity of other test machines), the Rockwell tester may be mounted on a metal plate with sponge rubber at least 25 mm thick, or upon any other mountings which effectively damp the vibration. 4.7 The testing apparatus is calibrated periodically using a test block of metal (cast iron, aluminium and magne
48、sium alloys, bearing metals) of known Rockwell hardness, using the Rockwell E scale. In this way any faults due to malfunctioning of the load application device or frame deformation will be observed; these faults shall be corrected before use. Ancillary checks may be made at frequent intervals using
49、 blocks calibrated for use when the machine is set up in the R, L or M test modes. 5 Test specimen 5.1 The standard test specimen shall be a flat sheet at least 6 mm thick. It shall be of a suitable area to meet the requirements of 7.4. The test specimen does not necessarily have to be square. It shall not show any evidence of imprint by the indentor on the supported surface after a test. 5.2 When specimens of the mini
