1、February 2012 Translation by DIN-Sprachendienst.English price group 14No 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).I
2、CS 77.080.10!$yrs“1867980www.din.deDDIN EN 16079Founding Compacted (vermicular) graphite cast ironsEnglish translation of DIN EN 16079:2012-02Gieereiwesen Gusseisen mit VermiculargraphitEnglische bersetzung von DIN EN 16079:2012-02Fonderie Fontes graphite vermiculaire (compact)Traduction anglaise de
3、 DIN EN 16079:2012-02www.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.3201.12 DIN EN 16079:2012-02 2 A comma is used as the decimal marker. National foreword This standard has been prepared by Technical Committee CEN/TC 190 “Foundry
4、 technology” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was the Normenausschuss Gieereiwesen (Foundry Practice Standards Committee), Working Committee NA 036-00-01 AA Gusseisenwerkstoffe. EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 16079 November 20
5、11 ICS 77.080.10 English Version Founding - Compacted (vermicular) graphite cast irons Fonderie - Fontes graphite vermiculaire (compact) Gieereiwesen - Gusseisen mit Vermiculargraphit This European Standard was approved by CEN on 1 October 2011. CEN members are bound to comply with the CEN/CENELEC I
6、nternal 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 CEN-CENELEC Management Centre or to
7、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 has the same status as the official
8、 versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovaki
9、a, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide fo
10、r CEN national Members. Ref. No. EN 16079:2011: EEN 16079:2011 (E) 2 Contents Page Foreword 3Introduction .41 Scope 52 Normative references 53 Terms and definitions .54 Designation 65 Order information 66 Manufacture 67 Requirements .67.1 General 67.2 Test pieces machined from cast samples .77.3 Tes
11、t pieces machined from samples cut from a casting .77.4 Hardness .87.5 Graphite structure88 Sampling .88.1 General 88.2 Cast samples 98.3 Samples cut from a casting . 109 Test methods . 149.1 Tensile test 149.2 Hardness test 169.3 Graphite structure examination 1610 Retests . 1610.1 Need for retests
12、 . 1610.2 Test validity . 1610.3 Nonconforming test results . 1710.4 Heat treatment of samples and castings 1711 Inspection documentation . 17Annex A (informative) Additional information on properties and typical applications of compacted (vermicular) graphite cast irons 18Annex B (informative) Comp
13、arison of compacted (vermicular) graphite cast iron material designations according to EN 1560 and ISO/TR 1593145 . 21Annex C (informative) Wedge penetration test 22Annex D (informative) Guidance values for tensile properties measured on test pieces machined from samples cut from a casting 25Annex E
14、 (informative) Guidance values for Brinell hardness 26Annex F (informative) Compacted (vermicular) graphite structure evaluation . 27Annex G (normative) Sectioning procedure for cast samples . 29Bibliography . 30DIN EN 16079:2012-02 EN 16079:2011 (E) 3 Foreword This document (EN 16079:2011) has been
15、 prepared by Technical Committee CEN/TC 190 “Foundry technology”, the secretariat of which is held by DIN. 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 May 2012, and conflicting national standa
16、rds shall be withdrawn at the latest by May 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. Within its programme of work, Techni
17、cal Committee CEN/TC 190 requested CEN/TC 190/WG 5 “Grey cast iron and compacted graphite cast iron“ to prepare EN 16079. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium
18、, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom DIN EN 16079:
19、2012-02 EN 16079:2011 (E) 4 Introduction This European Standard classifies compacted (vermicular) graphite cast irons (CGI), in accordance with the mechanical properties of the material. The properties of compacted (vermicular) graphite cast irons depend on their graphite and matrix microstructure.
20、The mechanical properties of the material can be evaluated on machined test pieces prepared from separately cast samples, side by side cast samples, cast-on samples or samples cut from a casting. Annex A (informative) gives additional information on properties and typical applications of compacted (
21、vermicular) graphite cast irons. DIN EN 16079:2012-02 EN 16079:2011 (E) 5 1 Scope This European Standard defines the grades and the corresponding requirements for compacted (vermicular) graphite cast irons. This European Standard specifies 5 grades of compacted (vermicular) graphite cast iron by a c
22、lassification based on mechanical properties measured on machined test pieces prepared from cast samples. This European Standard does not cover technical delivery conditions for iron castings (see EN 1559-1 1 and EN 1559-3 2). 2 Normative references The following referenced documents are indispensab
23、le for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 10204, Metallic products Types of inspection documents. EN ISO 945-1, Microstructure of cast iro
24、ns Part 1: Graphite classification by visual analysis (ISO 945-1:2008) EN ISO 6506-1, Metallic materials Brinell hardness test Part 1: Test method (ISO 6506-1:2005) EN ISO 6892-1, Metallic materials Tensile testing Part 1: Method of test at room temperature (ISO 6892-1:2009) 3 Terms and definitions
25、For the purposes of this document, the following terms and definitions apply. 3.1 compacted (vermicular) graphite cast iron cast material, iron and carbon based, the carbon being present mainly in the form of compacted (vermicular) graphite particles that appear vermicular on a two-dimensional plane
26、 of polish, the graphite particles being embedded in a matrix consisting of ferrite, ferrite/pearlite, or pearlite 3.2 graphite modification treatment process that brings the liquid iron into contact with a substance to produce graphite in the predominantly compacted (vermicular) form during solidif
27、ication 3.3 vermicularity percentage of graphite particles that are of form III according EN ISO 945-1 3.4 cast sample quantity of material cast to represent the cast material, including separately cast sample, side by side cast sample and cast-on sample 3.5 separately cast sample sample cast in a s
28、eparate sand mould under representative manufacturing conditions and material grade 3.6 side-by-side cast sample sample cast in the mould alongside the casting, with a joint running system DIN EN 16079:2012-02 EN 16079:2011 (E) 6 3.7 cast-on sample sample attached directly to the casting 3.8 relevan
29、t wall thickness wall thickness representative of the casting, defined for the determination of the size of the cast samples to which the mechanical properties apply 4 Designation The material shall be designated either by symbol or by number as given in Table 1. In the case of samples cut from the
30、casting, the letter C is added at the end of the designation by symbol. NOTE The comparison of EN 16079 grade designations with the grades from the ISO standard for compacted (vermicular) cast irons, ISO 16112:2006 3, is given in Annex B. 5 Order information The following information shall be suppli
31、ed by the purchaser: a) the number of this European Standard; b) the designation of the material; c) the relevant wall thickness; d) any special requirements. All requirements shall be agreed between the manufacturer and the purchaser by the time of acceptance of the order e.g. technical delivery co
32、nditions according to EN 1559-1 and EN 1559-3. 6 Manufacture Unless otherwise specified by the purchaser, the method of manufacture of compacted (vermicular) graphite cast irons to obtain the specified mechanical properties and microstructure shall be left to the discretion of the manufacturer. The
33、manufacturer shall ensure that the requirements defined in this standard are met for the material grade specified in the order. All agreements between the manufacturer and the purchaser shall be made by the time of acceptance of the order. NOTE When compacted (vermicular) graphite cast iron is to be
34、 used for special applications, the chemical composition and heat treatment may be agreed between the manufacturer and the purchaser. 7 Requirements 7.1 General The property values apply to compacted (vermicular) graphite cast iron cast in sand moulds or moulds of comparable thermal behaviour. Subje
35、ct to amendments to be agreed upon in the order, they can apply to castings obtained by alternative methods. DIN EN 16079:2012-02 EN 16079:2011 (E) 7 The material designation is based on the minimum mechanical properties obtained in cast samples with a thickness or diameter of 25 mm. The designation
36、 is irrespective of the type of cast sample. Mechanical properties are wall thickness dependant as shown in Table 1. NOTE Tensile testing requires sound test pieces in order to guarantee pure uni-axial stress during the test. 7.2 Test pieces machined from cast samples The mechanical properties of co
37、mpacted graphite cast iron shall be as specified in Table 1. Table 1 Mechanical properties measured on test pieces machined from cast samples Material designation Relevant wall thickness t 0,2 % proof strength Rp0,2Tensile strength RmElongation A mm MPa MPa %Symbol Number min. min. min. EN-GJV-300 5
38、.2100 t 30 210 300 2,0 30 Lo(in principle, Lc Lo d); Ltis the total length of the test piece, which depends on Lc; r is the transition radius, which shall be at least 4 mm. NOTE The method of gripping the ends of the test piece, together with their length lt, may be agreed between the manufacturer a
39、nd the purchaser. Figure 5 Tensile test piece DIN EN 16079:2012-02 EN 16079:2011 (E) 16 As an alternative to the tensile test, the wedge penetration test can be used to determine the tensile strength. For further information, see Annex C. 9.2 Hardness test The hardness shall be determined as Brinell
40、 hardness in accordance with EN ISO 6506-1. Alternative hardness tests and the corresponding required hardness values may also be agreed. The test shall be carried out on the test piece or at one or several points on the casting after preparation of the testing area in accordance with the agreement
41、between the manufacturer and the purchaser. If the measurement locations are not the subject of an agreement, they shall be chosen by the manufacturer. If it is not possible to carry out the hardness test on the casting, then by agreement between the manufacturer and the purchaser, the hardness test
42、 may be carried out on a knob cast-on to the casting. 9.3 Graphite structure examination The graphite structure shall be confirmed by metallographic examination according to EN ISO 945-1. Samples for metallographic examination shall be taken from locations agreed between the manufacturer and the pur
43、chaser. Information for the evaluation of vermicularity in compacted (vermicular) graphite cast iron microstructures is provided in informative Annex F. When image analysis is used to evaluate the graphite structure, an agreement on the method used and set on parameters shall be made between manufac
44、turer and purchaser. Alternative methods, e.g. by non-destructive methods, may also be agreed upon. In case of a dispute, the result of the metallographic examination shall prevail. 10 Retests 10.1 Need for retests Retests shall be carried out if a test is not valid. Retests are permitted to be carr
45、ied out if a test result does not meet the mechanical property requirements for the specified grade. 10.2 Test validity A test is not valid if there is: a) a faulty mounting of the test piece or defective operation of the test machine; b) a defective test piece because of incorrect pouring or incorr
46、ect machining; c) a fracture of the test piece outside the gauge length; d) a casting defect in the test piece, evident after fracture. In the above cases, a new test piece shall be taken from the same cast sample, or from a duplicate sample cast at the same time, to replace those invalid test resul
47、ts. DIN EN 16079:2012-02 EN 16079:2011 (E) 17 10.3 Nonconforming test results If any test gives results which do not conform to the specified requirements, for reasons other than those given in 10.2, the manufacturer shall have the option to conduct retests. If the manufacturer conducts retests, two
48、 retests shall be carried out for each failed test. If both retests give results that meet the specified requirements, the material shall be deemed to conform to this European Standard. If the results of one or both retests fail to meet the specified requirements, the material shall be deemed not to conform to this European Standard. 10.4 Heat treatment of samples and castings Unless other
