1、December 2016 English price group 17No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 77.040.10!%9“2599122www.din.deD
2、IN EN ISO 6508-1Metallic materials Rockwell hardness test Part 1: Test method (ISO 65081:2016);English version EN ISO 65081:2016,English translation of DIN EN ISO 6508-1:2016-12Metallische Werkstoffe Hrteprfung nach Rockwell Teil 1: Prfverfahren (ISO 65081:2016);Englische Fassung EN ISO 65081:2016,E
3、nglische bersetzung von DIN EN ISO 6508-1:2016-12Matriaux mtalliques Essai de duret Rockwell Partie 1: Mthode dessai (ISO 65081:2016);Version anglaise EN ISO 65081:2016,Traduction anglaise de DIN EN ISO 6508-1:2016-12SupersedesDIN EN ISO 65081:201506www.beuth.deDocument comprises 42 pagesDTranslatio
4、n by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.02.17 DIN EN ISO 6508-1:2016-12 2 A comma is used as the decimal marker. National foreword This document (EN ISO 6508-1:2016) has been prepared by Technical Committee ISO/TC 164 “Mechanical testi
5、ng of metals”, Subcommittee SC 3 “Hardness testing” (Secretariat: DIN, Germany) in collaboration with Technical Committee ECISS/TC 101 “Test methods for steel (other than chemical analysis)” (Secretariat: AFNOR, France) in accordance with the agreement on technical cooperation between ISO and CEN (V
6、ienna Agreement). The responsible German body involved in its preparation was DIN-Normenausschuss Materialprfung (DIN Standards Committee Materials Testing), Working Committee NA 062-01-41 AA Hrteprfung fr Metalle. DIN EN ISO 6508 consists of the following parts, under the general title Metallic mat
7、erials Rockwell hardness test: Part 1: Test methods Part 2: Verification and calibration of testing machines and indenters Part 3: Calibration of reference blocks The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 3738-1 DIN EN ISO 3738-1
8、ISO 4498 DIN EN ISO 4498 ISO 6508-2 DIN EN ISO 6508-2 ISO 6508-3 DIN EN ISO 6508-3 ISO 18265 DIN EN ISO 18265 Amendments This standard differs from DIN EN ISO 6508-1:2015-06 as follows: a) the scope has been revised for clarification; b) the standard has been editorially revised. Previous editions D
9、IN DVM A 103: 1933-02 DIN 50103: 1942xx-03 DIN 50103-1: 1972-12, 1984-03 DIN 50103-2: 1972-12, 1973-10, 1984-03 DIN 50103-3: 1985-02 DIN EN 10109-1: 1995-01 DIN EN ISO 6508-1 1999-10, 2006-03, 2015-06 DIN EN ISO 6508-1 Corrigendum 1: 2000-05 DIN EN ISO 6508-1:2016-12 3 National Annex NA (informative
10、) Uncertainty of the measured hardness values NA.1 General In this part of ISO 6508, Annex G gives an example of assessing the uncertainty of measured hardness values. This national Annex gives an alternative, simplified method for calculating uncertainty. This method makes use of the uncertainty of
11、 the hardness testing machine, calculated as in Part 2 of this standards series and stated in the calibration certificate for the machine. Thus, a simpler method is made available to the user. The metrological chain needed for defining and disseminating hardness scales is shown in Figure I.1 of DIN
12、EN ISO 6508-1. NA.2 Indirect calibration of the hardness testing machine by the user Indirect calibration by means of hardness reference blocks (referred to below as CRM (certified reference material) serves to check the overall functioning of the hardness testing machine, and to determine its repea
13、tability and deviation from the real hardness value. The uncertainty of the results of indirect calibration is calculated using the following equation: HTM= CRM2+ H2+ ms2(NA.1) Where uCRMis an uncertainty contribution due to the calibration uncertainty of the certified value of CRM (Certified Refere
14、nce Material) from the calibration certificate for k = 1; uHis an uncertainty contribution due to the lack of repeatability of the hardness testing machine; umsis an uncertainty contribution due to the resolution of the hardness testing machine (ms=ms23). EXAMPLE Certified hardness of CRM HCRM= (45,
15、5 0,5) HRC Uncertainty of CRM uCRM= 0,25 HRC Resolution of the hardness testing machine ms= 0,1 m DIN EN ISO 6508-1:2016-12 4 Table NA.1 Results of indirect calibration No. Calculated hardness value H, HRC 1 46,4max2 46,1 3 45,3min4 45,7 5 45,8 Mean value 45,9 Standard deviation sH0,42 H= H(NA.2) Fo
16、r t = 1,14, n = 5 and sH= 0,42 HRC: uH= 0,21 HRC NA.3 Uncertainty budget Table NA.2 Uncertainty budget Quantity Estimated value Standard uncertainty Distribution type Sensitivity coefficientaUncertainty contribution Xixiu(xi) c ui(H) uCRM45,4 HRC 0,25 HRC Normal 1,0 0,25 HRC uH45,9 HRC 0,21 HRC Norm
17、al 1,0 0,21 HRC ums0,000 1 mm 0,000 03 mm Rectangular 1,0 0,03 HRC Combined uncertainty of measurement, uHTM0,33 HRC Expanded uncertainty of measurement, UHTM(k = 2) 0,66 HRC aFor Rockwell scale HRC: H = h/0,002 (NA.3) DIN EN ISO 6508-1:2016-12 5 NA.4 Uncertainty of hardness test results The uncerta
18、inty of hardness test results is given by the following equation: = HTM2+ 2(NA.4) where uHTMis the uncertainty of the hardness testing machine; uxis the standard deviation due to inhomogeneity of the hardness distribution in the test piece. Table NA.3 Determining inhomogeneity of the test piece No.
19、Calculated hardness value H, HRC 1 45,2min2 45,3 3 45,8max4 45,6 5 45,4 Mean value 45,46 Standard deviation, sx0,24 The measurement uncertainty of the test piece is = (NA.5) For t = 1,14, n = 5 and sx= 0,24: ux= 0,12 HRC Table NA.4 Measurement uncertainty of test piece Hardness of CRM Inhomogeneity
20、of test piece Uncertainty of hardness testing machine Expanded uncertainty of test piece H, HRC ux, HRC uHTM, HRC U, HRC 45,46 0,12 0,33 0,70 DIN EN ISO 6508-1:2016-12 6 National Annex NB (informative) Bibliography DIN EN ISO 3738-1, Hard metals Rockwell hardness test (scale A) Part 1: Test methods
21、DIN EN ISO 4498, Sintered metal materials, excluding hardmetals Determination of apparent hardness and microhardness DIN EN ISO 6508-2, Metallic materials Rockwell hardness test Part 2: Verification and calibration of testing machines and indenters DIN EN ISO 6508-3, Metallic materials Rockwell hard
22、ness test Part 3: Calibration of reference test blocks DIN EN ISO 18265, Metallic materials Conversion of hardness values EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 6508-1 August 2016 ICS 77.040.10 Supersedes EN ISO 6508-1:2015English Version Metallic materials - Rockwell hardness test
23、 - Part 1: Test method (ISO 6508-1:2016) Matriaux mtalliques - Essai de duret Rockwell - Partie 1: Mthode dessai (ISO 6508-1:2016) Metallische Werkstoffe - Hrteprfung nach Rockwell -Teil 1: Prfverfahren (ISO 6508-1:2016) This European Standard was approved by CEN on 23 July 2016. CEN members are bou
24、nd to comply with the CEN/CENELEC Internal Regulations which stipulate 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 C
25、EN-CENELEC Management Centre or to any CEN member. This European Standard 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 CEN-CENELEC Management Centre
26、has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
27、Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Br
28、ussels 2016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 6508-1:2016 EEuropean foreword .31 Scope . 52 Normative references 53 Principle 54 Symbols, abbreviated terms and designations . 65 Testing machine 86 Test piece 97 Pr
29、ocedure. 98 Uncertainty of the results . 119 Test report 1110 Conversions to other hardness scales or tensile strength values . 12Annex A (normative) Special HR30TSm and HR15TSm test for thin products . 13Annex B (normative) Minimum thickness of the test piece in relation to the Rockwell hardness .1
30、4Annex C (normative) Corrections to be added to Rockwell hardness values obtained on convex cylindrical surfaces .17Annex D (normative) Corrections to be added to Rockwell hardness C scale values obtained on spherical test surfaces of various diameters .20Annex E (normative) Daily verification proce
31、dure 21Annex F (normative) Inspection of diamond indenters 24Annex G (informative) Uncertainty of the measured hardness values 25Annex H (informative) CCM Working group on hardness .32Annex I (informative) Rockwell hardness measurement traceability33Bibliography .36Contents PageDIN EN ISO 6508 1:201
32、6 12 - -EN ISO 6508-1:2016 (E)2Foreword .4European foreword This document (EN ISO 6508-1:2016) has been prepared by Technical Committee ISO/TC 164 “Mechanical testing of metals” in collaboration with Technical Committee ECISS/TC 101 “Test methods for steel (other than chemical analysis)” the secreta
33、riat of which is held by AFNOR. 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 February 2017, and conflicting national standards shall be withdrawn at the latest by February 2017. Attention is dr
34、awn 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. This document supersedes EN ISO 6508-1:2015. According to the CEN-CENELEC Internal Regulations, the n
35、ational standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
36、Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 6508-1:2016 has been approved by CEN as EN ISO 6508-1:2016 without any modification. DIN EN ISO 6508 1:2016
37、12 - -EN ISO 6508-1:2016 (E)3 ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interest
38、ed 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. ISO collaborates closely with the International Electrotechnical Co
39、mmission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents
40、 should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible fo
41、r identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the c
42、onvenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) s
43、ee the following URL: www.iso.org/iso/foreword.html .The committee responsible for this document is ISO/TC 164, Mechanical testing of metals, Subcommittee SC 3, Hardness testing.This fourth edition cancels and replaces the third edition (ISO 6508-1:2015), of which it constitutes a minor revision in
44、order to clarify the scope of this part of ISO 6508.ISO 6508 consists of the following parts, under the general title Metallic materials Rockwell hardness test: Part 1: Test method Part 2: Verification and calibration of testing machines and indenters Part 3: Calibration of reference blocksDIN EN IS
45、O 6508 1:2016 12 - -EN ISO 6508-1:2016 (E)4 1 ScopeThis part of ISO 6508 specifies the method for Rockwell regular and Rockwell superficial hardness tests for scales A, B, C, D, E, F, G, H, K, 15N, 30N, 45N, 15T, 30T, and 45T for metallic materials and is applicable to stationary and portable hardne
46、ss testing machines.For specific materials and/or products, other specific International Standards apply (for instance, ISO 3738-1 and ISO 4498).NOTE Attention is drawn to the fact that the use of tungsten carbide composite for ball indenters is considered to be the standard type of Rockwell indente
47、r ball. Steel indenter balls are allowed to continue to be used only when complying with Annex A.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited app
48、lies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 6508-2:2015, Metallic materials Rockwell hardness test Part 2: Verification and calibration of testing machines and indentersISO 6508-3:2015, Metallic materials Rockwell hardness test Part 3: Calibration of reference blocks3 PrincipleAn indenter of specified size, shape, and material is forced into the surface of a test specimen under two force levels using the specific co
