EN 16124-2011 en Founding - Low-alloyed ferritic spheroidal graphite cast irons for elevated temperature applications《铁素体球墨铸铁的高温应用》.pdf

1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 16124:2011Founding Low-alloyedferritic spheroidal graphite castirons for elevated temperatureapplicationsBS EN 16124:2011 BRITISH STANDARDNational forewordThis British Stan

2、dard is the UK implementation of EN 16124:2011.The UK participation in its preparation was entrusted to TechnicalCommittee ISE/111, Steel Castings and Forgings.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to includ

3、e all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2011ISBN 978 0 580 71354 5ICS 77.080.10Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and

4、 Strategy Committee on 31 December 2011.Amendments issued since publicationDate T e x t a f f e c t e dBS EN 16124:2011EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 16124 November 2011 ICS 77.080.10 English Version Founding - Low-alloyed ferritic spheroidal graphite cast irons for elevated te

5、mperature applications Fonderie - Fontes ferritiques graphite sphrodal faiblement allies pour applications haute temprature Gieereiwesen - Niedriglegiertes ferritisches Gusseisen mit Kugelgraphit fr Anwendungen bei hheren TemperaturenThis European Standard was approved by CEN on 15 October 2011. CEN

6、 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 without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on appl

7、ication to the CEN-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 Ma

8、nagement Centre 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Neth

9、erlands, Norway, Poland, Portugal, Romania, Slovakia, 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

10、 in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 16124:2011: EBS EN 16124:2011EN 16124:2011 (E) 2 Contents Page Foreword 3Introduction .41 Scope 52 Normative references 53 Terms and definitions .54 Designation 65 Order information 66 Manufacture 67 Requirements

11、.77.1 Chemical composition 77.2 Microstructure 77.3 Mechanical properties .88 Sampling .98.1 General 98.2 Cast samples for tensile testing .98.3 Samples cut from a casting . 119 Test methods . 159.1 Chemical analysis . 159.2 Micrographic examination . 159.3 Tensile test 159.4 Hardness test 169.5 Spe

12、cific test . 1610 Retests . 1710.1 Need for retests. 1710.2 Test validity . 1710.3 Non-conforming test results 1710.4 Heat treatment of samples and castings 1711 Inspection documentation . 17Annex A (informative) Guidance values of mechanical properties for 3 special grades 18Annex B (informative) P

13、roperties of low alloyed ferritic spheroidal graphite cast irons at elevated temperatures . 19Annex C (informative) Additional information on general mechanical and physical properties . 33Annex D (informative) Heat treatment . 34Annex E (informative) Nodularity 35Annex F (normative) Sectioning proc

14、edure for cast samples 36Bibliography . 37BS EN 16124:2011EN 16124:2011 (E) 3 Foreword This document (EN 16124:2011) has been 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 stand

15、ard, either by publication of an identical text or by endorsement, at the latest by May 2012, and conflicting national standards 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

16、/or CENELEC shall not be held responsible for identifying any or all such patent rights. Within its programme of work, Technical Committee CEN/TC 190 requested CEN/TC 190/WG 7 “Spheroidal graphite, silicon molybdenum and austempered ductile iron“ to prepare EN 16124. According to the CEN/CENELEC Int

17、ernal Regulations, the national standards 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, Luxe

18、mbourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 16124:2011EN 16124:2011 (E) 4 Introduction This European Standard classifies low-alloyed ferritic spheroidal graphite cast irons, principally used for their hea

19、t and oxidation resistance properties. NOTE Ferritic spheroidal graphite cast irons alloyed with silicon and molybdenum is also known as SiMo cast irons. Due to the ferritic structure and the silicon and molybdenum content, these cast irons allow producing castings which are resistant to distortion

20、and oxidation at high temperatures. Nine grades of low-alloyed ferritic spheroidal graphite cast iron are defined by their silicon and molybdenum content. Typical applications for the first three grades are medium to heavy castings like turbine housings and compressor parts. The other six grades are

21、 mainly applied for exhaust manifolds and turbocharger parts in automotive applications. The mechanical properties of the material can be evaluated on machined test pieces prepared from cast samples or samples cut from a casting. Additional information on technical properties for low-alloyed ferriti

22、c spheroidal graphite cast iron is given in Annex B and Annex C. BS EN 16124:2011EN 16124:2011 (E) 5 1 Scope This European Standard defines the grades and the corresponding requirements for low-alloyed ferritic spheroidal graphite cast irons for elevated temperature applications. These requirements

23、are specified in terms of chemical composition: as given for each of the grades, graphite form and matrix structure: spheroidal graphite in a predominantly ferritic matrix, mechanical properties measured on machined test pieces prepared from cast samples. This European Standard does not cover techni

24、cal delivery conditions for iron castings, see EN 1559-1 1 and EN 1559-3 2. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the refere

25、nced document (including any amendments) applies. EN 10204, Metallic products Types of inspection documents EN ISO 945-1:2008, Microstructure of cast irons Part 1: Graphite classification by visual analysis (ISO 945-1:2008) EN ISO 6506-1, Metallic materials Brinell hardness test Part 1: Test method

26、(ISO 6506-1) EN ISO 6892-1, Metallic materials Tensile testing Part 1: Method of test at room temperature (ISO 6892-1) 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 low alloyed ferritic spheroidal graphite cast iron cast iron material with

27、carbon mainly present in the form of spheroidal graphite particles, alloyed with silicon in order to produce a predominantly ferritic matrix and alloyed with molybdenum to improve mechanical properties at elevated temperatures 3.2 graphite spheroidizing treatment operation that brings the liquid iro

28、n into contact with a substance to produce graphite in the predominantly spheroidal (nodular) form during solidification NOTE This operation is often followed by a second one called inoculation. 3.3 cast sample quantity of material cast to represent the cast material, including separately cast sampl

29、e, side by side cast sample and cast-on sample 3.4 separately cast sample sample cast in a separate sand mould under representative manufacturing conditions and material grade BS EN 16124:2011EN 16124:2011 (E) 6 3.5 side-by-side cast sample sample cast in the mould alongside the casting, with a join

30、t running system 3.6 cast-on sample sample attached directly to the casting 3.7 relevant 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

31、either by symbol or by number as given in Table 1. NOTE The designation system is in accordance with EN 1560 3. In the case of samples cut from the casting, the letter C is added at the end of the designation by symbol. 5 Order information The following information shall be supplied by the purchaser

32、: a) the number of this European Standard; b) the designation of the material; c) the relevant wall thickness of the casting; 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 condi

33、tions according to EN 1559-1 and EN 1559-3. 6 Manufacture Unless otherwise specified by the purchaser, the method of manufacture of low-alloyed ferritic spheroidal graphite cast irons and any heat treatment required to obtain the specified mechanical properties and microstructure shall be left to th

34、e discretion of the manufacturer. The manufacturer shall ensure that the requirements defined in this European 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. BS EN 16124:2

35、011EN 16124:2011 (E) 7 7 Requirements 7.1 Chemical composition The silicon and molybdenum content of low-alloyed ferritic spheroidal graphite cast iron grades shall be in accordance with Table 1. Unless otherwise agreed, the content of other elements shall be left to the discretion of the manufactur

36、er. If the presence of any element specified in Table 1 is required to be outside the limits indicated, or if any other alloying elements are required, their contents shall be agreed between the manufacturer and the purchaser and specified in the order. Table 1 Chemical composition Material designat

37、ion Silicon % (mass fraction) Molybdenum % (mass fraction) Symbol NumberEN-GJS-SiMo25-5 5.3111 2,3 to 2,7 0,4 to 0,6 EN-GJS-SiMo30-7 5.3112 2,8 to 3,2 0,6 to 0,8 EN-GJS-SiMo35-5 5.3113 3,3 to 3,7 0,4 to 0,6 EN-GJS-SiMo40-6 5.31143,8 to 4,2 0,5 to 0,7 EN-GJS-SiMo40-10 5.3115 0,8 to 1,1 EN-GJS-SiMo45-

38、6 5.31164,3 to 4,7 0,5 to 0,7 EN-GJS-SiMo45-10 5.3117 0,8 to 1,1 EN-GJS-SiMo50-6 5.31184,8 to 5,2 0,5 to 0,7 EN-GJS-SiMo50-10 5.3119 0,8 to 1,1 7.2 Microstructure 7.2.1 Graphite structure The graphite structure shall be mainly of form V and Vl in accordance with EN ISO 945-1. A more precise definiti

39、on may be agreed upon by the time of acceptance of the order. NOTE Annex E gives more information on nodularity. 7.2.2 Matrix structure The matrix structure shall consist of minimum 85 % ferrite, the balance consisting of pearlite and carbides. Carbides can be present to a maximum of 5 %. Other limi

40、ts may be agreed upon by the time of acceptance of the order. BS EN 16124:2011EN 16124:2011 (E) 8 7.3 Mechanical properties 7.3.1 Tensile properties The mechanical properties of the grades of cast irons obtained from cast samples with a thickness equal or less than 30 mm shall be in accordance with

41、Table 2. Other requirements, such as the mechanical properties to be met on samples with a thickness 30 mm or at specified locations on the castings, shall be agreed between the manufacturer and the purchaser and specified in the order. If applicable, the position of the cast-on sample or the specif

42、ied location on the casting shall be agreed between the manufacturer and the purchaser and specified in the order. NOTE Tensile testing requires sound test pieces in order to guarantee pure uni-axial stress during the test. 7.3.2 Hardness Guidance values for the Brinell hardness range of the materia

43、l grades are given in Table 2 and are applicable to the casting. Table 2 Mechanical properties measured at ambient temperature on test pieces machined from cast samples of low-alloyed ferritic spheroidal graphite cast irons Material designation 0,2 % proof strength Tensile strength Elongation Brinel

44、l hardness range aRp0,2 Rm A Symbol Number MPa MPa % HBW min. min. min. EN-GJS-SiMo25-5 5.3111 Guidance values are given in Annex A EN-GJS-SiMo30-7 5.3112 EN-GJS-SiMo35-5 5.3113 EN-GJS-SiMo40-6 5.3114 380 480 8 190 to 240 EN-GJS-SiMo40-10 5.3115 400 510 6 190 to 240 EN-GJS-SiMo45-6 5.3116 420 520 7

45、200 to 250 EN-GJS-SiMo45-10 5.3117 460 550 5 200 to 250 EN-GJS-SiMo50-6 5.3118 480 580 4 210 to 260 EN-GJS-SiMo50-10 5.3119 500 600 3 210 to 260 aValues for information, measured on the casting. BS EN 16124:2011EN 16124:2011 (E) 9 8 Sampling 8.1 General Samples shall be made from the same material a

46、s that used to produce the casting(s) which they represent. Several types of samples (separately cast samples, cast-on samples, side-by-side cast samples, samples cut from a casting) can be used, depending on the mass and wall thickness of the casting. When relevant, the type of sample should be agr

47、eed between the manufacturer and the purchaser. Unless otherwise agreed the choice of the option is left to the discretion of the manufacturer. When the mass of the casting exceeds 2 000 kg and its thickness exceeds 60 mm, cast-on samples should preferably be used; the dimensions and the location of

48、 the cast-on sample shall be agreed between the manufacturer and the purchaser by the time of acceptance of the order. If the spheroidizing treatment is carried out in the mould (in-mould process), the separately cast sample should be avoided. All samples shall be adequately marked to guarantee full

49、 traceability to the castings which they represent. The samples shall be subject to the same heat treatment, as that of the castings they represent, if any. Tensile test pieces shall be finally machined from the samples after the heat treatment. The samples for chemical analysis shall be cast in a manner which ensures that the accurate chemical composition can be determined. Due to post inoculation treatments, slight differences regarding the silicon content may be admitt