1、|BRITISH STANDARDBS EN ISO179-2:1999ICS 83.080.01NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWPlastics Determination of Charpyimpact properties Part 2: Instrumented impact test+A1:2012Incorporating corrigendumFebruary 2000National forewordThis British Standard is the UK impl
2、ementation of EN ISO 179-2:1999+A1:2012. It is identical ISO 179-2:1997 It supersedes BS EN ISO 179-2:1999, which is withdrawn.The UK participation in its preparation was entrusted to Tec ical Committee PRI/21, Testing of plastics.A list of organizations represented on this committee can be obtained
3、 on request to its secreta y.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.BS EN ISO 179-2:1999+A1:2012This British Standard,
4、having been prepared under the direction of the Sector Committee for Ma erials and Chemicals, was published under the authority of the Standards Committee and comes into effect on 15 September 1999 The British Standards Institution 2012. Published by BSI Standards Limited 2012Amendments/corrigenda i
5、ssued since publicationAmd.No. Date Comments 10777 CorrigendumFebruary 2000Corrects secondary identifier30 June 2012Implementation of ISO amendment 1:2011 with CEN endorsement A1:2012: Amendment of Clause 9 and nsertion of Annex D.ISBN 978 0 580 61141 4hnrto incorporating corrigendum 1:1998 and amen
6、dment 1:2011. tiForeword to amendment A1 The text of EN ISO 179-2:1997/Amd 1:2011 has been prepared by Technical Committee ISO/TC 61 “Plastics” of the International Organization for Standardization (ISO) has been taken over as EN ISO 179-2:1999/A1:2012 to the European Standard by Technical Committee
7、 CEN/TC 249 “Plastics” the secretariat of which is held by NBN. 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of an identical text or by endorsement, at the latest by October 2012, and conflicting national standards shall be withdrawn at the latest by
8、 October 2012. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standar
9、ds organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Pol
10、and, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 179-2:1997/Amd 1:2011 has been approved by CEN as a EN ISO 179-2:1999/A1:2012 without any modification. BS EN ISO 179-2:1999+A1:2012 EN ISO 179-2:1999+A1:2012 (E)
11、BS EN ISO 179-2:1999+A1:2012 EN ISO 179-2:1999+A1:2012 (E)BS EN ISO 179-2:1999+A1:2012 EN ISO 179-2:1999+A1:2012 (E)BS EN ISO 179-2:1999+A1:2012 EN ISO 179-2:1999+A1:2012 (E)BS EN ISO 179-2:1999+A1:2012 EN ISO 179-2:1999+A1:2012 (E)BS EN ISO 179-2:1999+A1:2012 EN ISO 179-2:1999+A1:2012 (E)BS EN ISO
12、179-2:1999+A1:2012 EN ISO 179-2:1999+A1:2012 (E)BS EN ISO 179-2:1999+A1:2012 EN ISO 179-2:1999+A1:2012 (E)BS EN ISO 179-2:1999+A1:2012 EN ISO 179-2:1999+A1:2012 (E)BS EN ISO 179-2:1999+A1:2012 EN ISO 179-2:1999+A1:2012 (E)BS EN ISO 179-2:1999+A1:2012 EN ISO 179-2:1999+A1:2012 (E)BS EN ISO 179-2:1999
13、+A1:2012 EN ISO 179-2:1999+A1:2012 (E)BS EN ISO 179-2:1999+A1:2012 EN ISO 179-2:1999+A1:2012 (E)BS EN ISO 179-2:1999+A1:2012 EN ISO 179-2:1999+A1:2012 (E)BS EN ISO 179-2:1999+A1:2012 EN ISO 179-2:1999+A1:2012 (E)BS EN ISO 179-2:1999+A1:2012 EN ISO 179-2:1999+A1:2012 (E)BS EN ISO 179-2:1999+A1:2012 E
14、N ISO 179-2:1999+A1:2012 (E)BS EN ISO 179-2:1999+A1:2012 EN ISO 179-2:1999+A1:2012 (E)Annex D (informative) Precision data D.1 Tables D.1 and D.2 are based on a round-robin test involving four laboratories and one material. All of the test samples were produced and distributed by one source. Each “t
15、est result” was the average of 10 individual determinations. Each laboratory obtained and reported 10 test results for each material. D.2 Tables D.3 and D.4 are based on a round-robin test involving three laboratories and one material. All of the test samples were produced and distributed by one sou
16、rce. Each “test result” was the average of 10 individual determinations. Each laboratory obtained and reported 10 test results for each material. D.3 Due to the limited number of laboratories and materials, the explanations of r and R given in Clause D.4 are only intended to present a meaningful way
17、 of considering the approximate precision of this test method. The data in Tables D.1 to D.4 should not be rigorously applied to acceptance or rejection of material, as those data are specific to the round robin and might not be representative of other lots, conditions, materials or laboratories. D.
18、4 Concept of “r” and “R” in Tables D.1 to D.4: If srand sRhave been calculated from a large enough body of data, and for test results that were averages from testing 10 specimens for each test result, then the following applies: a) Repeatability Two test results obtained within one laboratory should
19、 be judged not equivalent if they differ by more than the r value for that material, r being the interval representing the critical difference between two test results for the same material, obtained by the same operator using the same equipment in the same laboratory. b) Reproducibility Two test re
20、sults obtained by different laboratories should be judged not equivalent if they differ by more than the R value for that material, R being the interval representing the critical difference between two test results for the same material, obtained by different operators using different equipment in d
21、ifferent laboratories. The judgements in a) and b) will have an approximately 95 % (0,95) probability of being correct. BS EN ISO 179-2:1999+A1:2012 EN ISO 179-2:1999+A1:2012 (E)18Table D.1 Precision for Charpy (notched) impact strength Values in kilojoules per square metre Material Average srsRr R
22、PS-HI 13,03 0,099 1,56 0,28 4,36 srwithin-laboratory standard deviation; sRbetween-laboratory standard deviation; r 95 % repeatability limit (= 2,8sr); R 95 % reproducibility limit (= 2,8sR). Table D.2 Precision for impact energy at break Values in joules Material Average srsRr R PS-HI 0,40 0,004 0,
23、04 0,01 0,11 srwithin-laboratory standard deviation; sRbetween-laboratory standard deviation; r 95 % repeatability limit (= 2,8sr); R 95 % reproducibility limit (= 2,8sR). Table D.3 Precision for maximum impact force Values in newtons Material Average srsRr R PS-HI 193,7 3,62 9,72 10,14 27,23 srwith
24、in-laboratory standard deviation; sRbetween-laboratory standard deviation; r 95 % repeatability limit (= 2,8sr); R 95 % reproducibility limit (= 2,8sR). Table D.4 Precision for deflection at maximum impact force Values in millimetres Material Average srsRr R PS-HI 1,89 0,049 0,06 0,14 0,17 srwithin-
25、laboratory standard deviation; sRbetween-laboratory standard deviation; r 95 % repeatability limit (= 2,8sr); R 95 % reproducibility limit (= 2,8sR). BS EN ISO 179-2:1999+A1:2012 EN ISO 179-2:1999+A1:2012 (E)19BSI is the independent national body responsible for preparing British Standards and other
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