1、BRITISH STANDARD BS EN 10031:2003 Semi finished products for forging Tolerances on dimensions shape and mass The European Standard EN 10031:2003 has the status of a British Standard ICS 77.140.85 BS EN 10031:2003 This British Standard was published under the authority of the Standards Policy and Str
2、ategy Committee on 27 March 2003 BSI 27 March 2003 ISBN 0 580 41478 7 National foreword This British Standard is the official English language version of EN 10031:2003. The UK participation in its preparation was entrusted by Technical Committee ISE/73, Steel for pressure purposes, to Subcommittee I
3、SE/73/3, Steel forgings for pressure purposes, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this docu
4、ment may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract.
5、 Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for ch
6、ange, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 8, an inside back cover and a back cover. The BSI copyright da
7、te displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN10031 March2003 ICS77.140.85 Englishversion SemifinishedproductsforforgingTolerancesondimensions shapeandmass Demiprod
8、uitspourforgeageTolrancessurdes dimensions,laformeetlamasse HalbzeugzumSchmiedenGrenzabmae, FormtoleranzenundGrenzabweichungenderMasse ThisEuropeanStandardwasapprovedbyCENon28November2002. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope a
9、n Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemad
10、ebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Ne
11、therlands,Norway,Portugal,Slovakia,Spain,Sweden,SwitzerlandandUn ited Kingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2003CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnatio
12、nalMembers. Ref.No.EN10031:2003EEN10031:2003(E) 2 Contents page Foreword3 1 Scope 4 2 Normativereferences 4 3 Termsanddefinitions. .4 4 Appearanceandsoundness .4 4.1 General4 4.2 Removalofsurfacedefects 4 5 Tolerancesondimensions 5 5.1 Tolerancesonsidesofthecrosssection .5 5.1.1 Rectangularsemifinis
13、hedproducts .5 5.1.2 Squareorcircularsemifinishedproducts . 5 5.2 Diagonaltolerances. 5 5.3 Lengthtolerances . .5 5.3.1 Deliveryinstandardlengths .5 5.3.2 Deliveryinfixedlengths. .5 6 Shapetolerances .6 6.1 Straightness .6 6.2 Twist6 7 Tolerancesonmass 6 7.1 Tolerancesonmassperunitlength 6 7.1.1 Cas
14、eofbillets. 6 7.1.2 Caseofbloomsandslabs .6 7.2 Toleranceonbatchquantities. .6 Bibliography 8EN10031:2003(E) 3 Foreword Thisdocument(EN10031:2003)hasbeenpreparedbyTechnicalCommitteeECISS/TC28“Steelforgings“,the secretariatofwhichisheldbyBSI. ThisEuropeanStandardshallbegiventhestatusofanationalstanda
15、rd,eitherbypublicationofanidenticaltextor byendorsement,atthelatestbySeptember2003,andconflictingnationalstandardsshallbewithdrawnatthe latestbySeptember2003. ItisbasedonandreplacesEURONORM31:1969. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowing countries
16、areboundtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark,Finland, France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal, Slovakia,Spain,Sweden,SwitzerlandandtheUnitedKingdom.EN10031:2003(E) 4 1Scope ThisEuropeanStandardspecifiesthetoler
17、ancesondimensions,shapeandmassforsemifinishedproducts intendedtoundergohotformingbyforging,i.e.blooms,slabsandbilletsmadeof: generalpurposesteels,inaccordancewithEN102501to4; steelsforpressurepurposes,inaccordancewithEN102221to5. Itdoesnotcoversemifinishedproductsintendedfordropforgingwhicharecovere
18、dbyEN102431. 2 Normativereferences ThisEuropeanStandardincorporatesbydatedorundatedreference,provisionsfromotherpublications.These normativereferencesarecitedattheappropriateplacesinthetextandthepublicationsarelistedhereafter.For datedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicati
19、onsapplytothisEuropean Standardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencesthelatesteditionofthe publicationapplies(includingamendments). EN10079:1992, Definitionofsteelproducts . 3 Termsanddefinitions ForthepurposesofthisEuropeanStandard,thetermsanddefinitionsgiveninEN10079:19
20、92apply. 4Appearance and soundness 4.1General Thesemifinishedproductsshallbesoundandfreefromdefectssuchassegregation,cracks,laminationsand otherimperfectionsthatprecludetheirintendeduse. 4.2Removalofsurfacedefects Surfacedefectsshallberemovedbydressinginordertoconformwith4.1.Dressingmaybecarriedoutb
21、ychipping and/orgrindingorbyanysuitablemethodproviding: theresultingdepressionforasinglefaceshallnotfallbelowavalueequaltoamaximumof2%ofthenominal sizeor3mm,whicheveristhegreater; inthecaseofremovalofdefectsfromvariousfacesofthesamecrosssection,theresidualtransverse dimensionsshallremainwithinthespe
22、cifiedtolerances; inordertoensureadequateblending,thewidthoftheremovedareashallbe 6timesitsdepthandthe resultingdepressionshallnotundercutthesurface.EN10031:2003(E) 5 5 Tolerancesondimensions 5.1Tolerancesonsidesofthecrosssection 5.1.1Rectangular semifinished products Thetolerancesonthespecifiedthic
23、kness tandthewidth bshallbe : a)specified thickness t 4%or3mm,whicheveristhegreater; b)specified width b 150mm:3%or3mm,whicheveristhegreater; 150mm:4,5mmor2%whicheveristhegreater. 5.1.2 Squareorcircularsemifinishedproducts Thetoleranceonthespecifiedsidelength aordiameter d shallbe: 150mm:3%or3mm,whi
24、cheveristhegreater; 150mm:4,5mmor2%whicheveristhegreater. 5.2Diagonaltolerances Thedifferencebetweenthetwodiagonalsofthesamesectionshallbe 6%ofthelargerofthetwodiagonalsfor semifinishedproductsofnominalwidth 200mm.Forwidersemifinishedproducts,thetoleranceshallbethe subjectofagreementatthetimeofenqui
25、ryandorder. 5.3Lengthtolerances 5.3.1 Deliveryinstandardlengths Ifstandardlengthsareordered,atoleranceof 1000mmshallapply.Semifinishedproductsshallhavealength 1000mmunlessagreedatthetimeofenquiryandorder. Inaddition,forsemifinishedproductsofnominalcrosssectionalarea 22 500mm 2 ,only10%(relativetothe
26、 massoftheorder)ofsemifinishedproductsshorterthanthevaluesindicatedispermittedperdelivery. Forsemifinishedproductsofnominalcrosssectionalarea22500mm 2 ,thepercentageofshortsemifinished productsshallbethesubjectofagreementatthetimeofenquiryandorder. 5.3.2 Deliveryinfixedlengths Iffixedlengthsareorder
27、ed,thefollowingtoleranceclassesapply: a) Normaltolerance,250mm; b) Tightenedtolerance,100mm; c) Reducedtolerance,50mm. Thetoleranceclassshallbespecifiedatthetimeoforder.Ifthereisnotoleranceindication,thenormaltolerance (250mm)applies.EN10031:2003(E) 6 Specialtoleranceslowerthanthosespecifiedina),b)o
28、rc)maybeagreedatthetimeofenquiryandorder.If agreedatthetimeofenquiryandorder,thetolerancemaybetotallypositiveortotallynegative. Inaddition,ifspecifiedatthetimeofenquiryandorder,20%ofthesemifinishedproductsshallbepermittedin submultiplesoftheservicelength;thetolerancesapplicabletotheseshortbarsareone
29、classtighterthanthose specifiedfortheorderedlength. 6 Shapetolerances 6.1Straightness Semifinishedproductsshallbedeliveredhotformedwithoutanyspecialstraightening.Thepermissibledeviations shallbe: inthecaseofbending,10mmpermetreuniformlydistributed(seeFigure1); inthecaseoflocaldeformationsorwaviness,
30、20mmpermetre(seeFigure2). Ifspecifiedatthetimeofenquiryandorder,specialstraighteningshallbecarriedout;thepermissibledeviations shallbelessthan4mmperm. Tolerancesondeformationoftheendsmaybeagreedatthetimeofenquiryandorder. 6.2Twist Squaresemifinishedproductsshallnothaveatwistanglegreaterthan4perm,wit
31、hamaximumof10for lengths 6mand15forgreaterlengths. Rectangularsemifinishedproductsshallnothaveatwistlikelytoadverselyaffecttheirapplication.Ifspecifiedat thetimeofenquiryandorder,thetolerancesspecifiedforsquaresemifinishedproductsalsoapplyforrectangular semifinishedproducts. 7 Tolerancesonmass 7.1To
32、lerancesonmassperunitlength 7.1.1 Caseofbillets Themassshallbebetween88%and100%inclusiveofthetheoreticalmassperunitlengthcorrespondingtothe nominalcrosssectionalarea(squareorrectangleofthecorrespondingdimensions). 7.1.2 Caseofbloomsandslabs Themassshallbebetween94%and100%inclusiveofthetheoreticalmas
33、sperunitlengthcorrespondingtothe nominalcrosssectionalarea(squareorrectangleofthecorrespondingdimensions). 7.2Toleranceonbatchquantities Tolerancesbetweenthetheoreticalmassandthedeliveredmassare: for a batch 5tons10%; forabatch5tons7%. 7.3 Widertolerancesthanthosespecifiedin 7.1and 7.2maybeagreedatt
34、hetimeofenquiryandorder.EN10031:2003(E) 7 Figure1Uniformlydistributeddeformation Key 1 Deviationfromstraightness Figure2LocaldeformationEN10031:2003(E) 8 Bibliography 1 EN102221,SteelforgingsforpressurepurposesPart1:Generalrequirementsforopendieforgings 2EN102222,SteelforgingsforpressurepurposesPart
35、2:Ferriticandmartensiticsteelswithspecified elevatedtemperatureproperties 3EN102223,SteelforgingsforpressurepurposesPart3:Nickelsteelswithspecifiedlowtemperature properties 4 EN102224,SteelforgingsforpressurepurposesPart4:Weldablefinegrainsteelswithhighproofstrength 5EN102225,Steelforgingsforpressur
36、epurposesPart5:Martensitic,austeniticandausteniticferritic stainlesssteels 6 EN102431,SteeldieforgingsTolerancesondimensionsPart1:Dropandverticalpressforgings 7 EN102501,OpendiesteelforgingsforgeneralengineeringpurposesPart1:Generalrequirements 8 EN102502,Opendiesteelforgingsforgeneralengineeringpur
37、posesPart2:Nonalloyqualityandspecial steels 9 EN102503,OpendiesteelforgingsforgeneralengineeringpurposesPart3:Alloyspecialsteels 10EN102504,OpendiesteelforgingsforgeneralengineeringpurposesPart4:StainlesssteelsblankBS EN 10031:2003 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Insti
38、tution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revision. Users of British Standards sh
39、ould make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical commi
40、ttee responsible, the identity of which can be found on the inside front cover. Tel: +44 (0)20 8996 9000. Fax: +44 (0)20 8996 7400. BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards. Buying standards Or
41、ders for all BSI, international and foreign standards publications should be addressed to Customer Services. Tel: +44 (0)20 8996 9001. Fax: +44 (0)20 8996 7001. Email: ordersbsi-. Standards are also available from the BSI website at http:/www.bsi-. In response to orders for international standards,
42、it is BSI policy to supply the BSI implementation of those that have been published as British Standards, unless otherwise requested. Information on standards BSI provides a wide range of information on national, European and international standards through its Library and its Technical Help to Expo
43、rters Service. Various BSI electronic information services are also available which give details on all its products and services. Contact the Information Centre. Tel: +44 (0)20 8996 7111. Fax: +44 (0)20 8996 7048. Email: infobsi-. Subscribing members of BSI are kept up to date with standards developments and receive substantial discounts on the purchase price of standards. For details of these and other benefits contact Membership Administration. Tel: +44 (0)20 8996 7002. Fax: +44 (0)20 8996 7001. Email: membershipbsi-. Information regarding online access to Briti
