EN ISO 898-3-2018 en Mechanical properties of fasteners made of carbon steel and alloy steel - Part 3 Flat washers with specified property classes.pdf

1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Mechanical properties of fasteners made of carbon steel and alloy steelPart 3: Flat washers with specified property classesBS EN ISO 8983:2018National forewordThis British Standard is the UK implementation of EN ISO 898

2、3:2018. It is identical to ISO 8983:2018.The UK participation in its preparation was entrusted to Technical Committee FME/9, Fasteners.A list of organizations represented on this committee can be obtained on request to its secretary.BSI, as a member of CEN, is obliged to publish EN ISO 8983:2018 as

3、a British Standard. However, attention is drawn to the fact that during the development of this European Standard, the UK committee voted against its approval as a European Standard.FME/9 voted to disapprove this standard for the following reason.Table 1 of ISO 8983:2018 does not permit 100 HV washe

4、rs to be used with 8.8/8 bolt and nut assemblies or with 10.9/10 bolt and nut assemblies.Bolt, nut and washer assemblies using these washers are permitted in accordance with the cited harmonized standard EN 150481:2007 (see EN 150481:2007, Table 6), and are required for use in structural connections

5、 as specified in EN 10902, Execution of steel structures and aluminium structures Part 2: Technical requirements for steel structures.These assemblies are used extensively in nonpreloaded structural bolting in the UK and have been used successfully for well over 40 years. The function of the washers

6、 in these nonpreloaded structural bolting assemblies is solely to reduce local damage to metal coatings applied to the structural steelwork, and there is therefore no technical justification for prohibiting the use of 100 HV washers for these assemblies.Note: EN 150481:2016 and EN 150482:2016 have b

7、een published but the harmonized standard EN 150481:2016 has not yet been cited. Requirements concerning washers have been removed from EN 150481:2016 but the requirements concerning the use of 100 HV washers with 8.8/8 bolt and nut assemblies or with 10.9/10 bolt and nut assemblies are retained in

8、EN 150482:2016 (see EN 150482:2016, Clause 5.2)FME/9 recommends that for all structural bolting assemblies required for EN 10902 connections the requirements of ISO 8983:2018 should be disregarded.This publication does not purport to include all the necessary provisions of a contract. Users are resp

9、onsible for its correct application. The British Standards Institution 2018 Published by BSI Standards Limited 2018ISBN 978 0 580 92823 9ICS 21.060.20Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standa

10、rds Policy and Strategy Committee on 31 July 2018.BRITISH STANDARDBS EN ISO 8983:2018Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARD BS EN ISO 8983:2018EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 8983June 2018ICS 21.060.20EUROPEAN COMMITTEE FOR STANDARDIZAT

11、IONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGCENCENELEC Management Centre: Avenue Marnix 17, B1000 Brussels 2018 CEN Ref. No. EN ISO 8983:2018: EAll rights of exploitation in any form and by any means reserved worldwide for CEN national MembersMechanical properties of fasteners mad

12、e of carbon steel and alloy steel Part 3: Flat washers with specified property classes (ISO 8983:2018)Caractristiques mcaniques des fixations en acier au carbone et en acier alli Partie 3: Rondelles de forme plane de classes de qualit spcifies (ISO 8983:2018)Mechanische Eigenschaften von Verbindungs

13、elementen aus Kohlenstoffstahl und legiertem Stahl Teil 3: Flache Scheiben mit festgelegten Festigkeitsklassen (ISO 8983:2018)This European Standard was approved by CEN on 16 May 2018.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving

14、this European Standard the status of a national standard without any alteration. Uptodate lists and bibliographical references concerning such national standards may be obtained on application to the CENCENELEC Management Centre or to any CEN member.This European Standard exists in three official ve

15、rsions (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 CENCENELEC Management Centre has the same status as the official versions.CEN members are the national standards bodies of Austria,

16、 Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, S

17、weden, Switzerland, Turkey and United Kingdom.English VersionEN ISO 8983:2018 (E)European forewordThis document (EN ISO 8983:2018) has been prepared by Technical Committee ISO/TC 2 “Fasteners“ in collaboration with Technical Committee CEN/TC 185 “Fasteners” the secretariat of which is held by BSI.Th

18、is 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 December 2018, and conflicting national standards shall be withdrawn at the latest by December 2018.Attention is drawn to the possibility that some of

19、 the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights.According to the CENCENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European S

20、tandard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, S

21、lovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.Endorsement noticeThe text of ISO 8983:2018 has been approved by CEN as EN ISO 8983:2018 without any modification.iiBS EN ISO 8983:2018ISO 8983:2018Foreword ivIntroduction v1 Scope .12 Normative references 13 Terms and definitions .2

22、4 Symbols 25 Designation system for property classes of washers and combination with property classes of bolts, screws, studs and nuts 26 Materials .37 Mechanical and physical properties 48 Test methods .58.1 Hardness test 58.1.1 General58.1.2 Hardness test on the washer bearing surface.68.1.3 Hardn

23、ess determined on a transverse radial section through the washer . 98.2 Decarburization test 108.2.1 General.108.2.2 Microscopic method .108.2.3 Hardness method .118.3 Carburization test 128.3.1 General.128.3.2 Test procedure 128.3.3 Requirements 128.4 Retempering test 128.4.1 General.128.4.2 Test p

24、rocedure 128.4.3 Requirements 129 Marking .139.1 General 139.2 Marking of washers 139.3 Marking of packages 13Annex A (normative) Ductility test for washers of property class 380HV .14Bibliography .17 ISO 2018 All rights reserved iiiContents PageBS EN ISO 8983:2018ISO 8983:2018ForewordISO (the Inter

25、national 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 interested in a subject for which a technical committee has

26、been established has the right to be represented on that committee. International organizations, governmental and nongovernmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical sta

27、ndardization. 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 should be noted. This document was drafted in accor

28、dance 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 for identifying any or all such patent rights. Details

29、 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 convenience of users and does not constitute an endor

30、sement. For an explanation on the voluntary nature of standards, 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) see the following

31、 URL: www.iso.org/iso/foreword.html.This document was prepared by Technical Committee ISO/TC 2, Fasteners.A list of all parts in the ISO 898 series can be found on the ISO website.iv ISO 2018 All rights reservedBS EN ISO 8983:2018ISO 8983:2018IntroductionISO 898 consists of the following parts, unde

32、r the general title “Mechanical properties of fasteners made of carbon steel and alloy steel”: Part 1: Bolts, screws and studs with specified property classes Coarse thread and fine pitch thread Part 2: Nuts with specified property classes Coarse thread and fine pitch thread Part 5: Set screws and s

33、imilar threaded fasteners with specified hardness classes Coarse thread and fine pitch thread Part 7: Torsional test and minimum torques for bolts and screws with nominal diameters 1 mm to 10 mm This document in the ISO 898 series provides a single point of reference for flat washers, in order to st

34、andardize market expectations for users, distributors and manufacturers.This document only deals with flat washers made of carbon steel or alloy steel.Washers made of stainless steel are not addressed in this document due to their different characteristics and test methods. ISO 2018 All rights reser

35、ved vBS EN ISO 8983:2018This page deliberately left blankMechanical properties of fasteners made of carbon steel and alloy steel Part 3: Flat washers with specified property classes1 ScopeThis document specifies mechanical and physical properties of flat washers, designed to be used in bolted joints

36、 in combination with bolts, screws, studs and nuts with a specified property class in accordance with ISO 8981 and ISO 8982.NOTE 1 These types of washers can also be used with other fasteners such as screws forming their own mating thread.Washers that conform to the requirements of this document are

37、 evaluated at an ambient temperature range of 10 C to 35 C. They might not retain the specified mechanical and physical properties at elevated temperatures and/or lower temperatures.NOTE 2 Washers conforming to the requirements of this document are used in applications ranging from 50 C to +150 C. U

38、sers are advised to consult an experienced fastener expert for temperatures outside this range and up to a maximum temperature of +300 C when determining appropriate choices, or for critical applications.This document is applicable to the following flat captive and noncaptive washers made of carbon

39、steel or alloy steel, with thickness from 0,2 mm to 12 mm: plain washers (with or without knurls, ribs or chamfers); square washers; square hole washers; shaped plates.It does not specify requirements for the following properties: corrosion resistance; weldability.2 Normative referencesThe following

40、 documents are referred to in the text in such a way that some or all of their content constitutes requirements 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.ISO 18914,

41、Fasteners Terminology Part 4: Controls, inspection, delivery, acceptance and qualityISO 65071, Metallic materials Vickers hardness test Part 1: Test methodISO 65081, Metallic materials Rockwell hardness test Part 1: Test methodISO 10644, Screw and washer assemblies made of steel with plain washers W

42、asher hardness classes 200 HV and 300 HVINTERNATIONAL STANDARD ISO 8983:2018 ISO 2018 All rights reserved 1BS EN ISO 8983:2018ISO 8983:2018ISO 10669, Plain washers for tapping screw and washer assemblies Normal and large series Product grade AISO 10673, Plain washers for screw and washer assemblies

43、Small, normal and large series Product grade AISO 10684, Fasteners Hot dip galvanized coatings3 Terms and definitionsNo terms and definitions are listed in this document.ISO and IEC maintain terminological databases for use in standardization at the following addresses: ISO Online browsing platform:

44、 available at https:/www.iso.org/obp IEC Electropedia: available at http:/www.electropedia.org/4 SymbolsFor the purposes of this document, the following symbols apply.d1clearance hole, mmd2outside diameter, mmF force, NG depth of the complete decarburization, mmr radius of the supporting part and pr

45、essure part for the ductility test, mmt nominal thickness of flat washer, mmteffeffective thickness of the material measured on the washer, mm angle of the supporting part and pressure part for the ductility test, 5 Designation system for property classes of washers and combination with property cla

46、sses of bolts, screws, studs and nutsThe symbol for property classes of washers is composed of two parts: the number to the left is the minimum Vickers hardness value in accordance with Table 3; the letters HV to the right represent Vickers hardness.EXAMPLE A steel flat washer with a minimum Vickers

47、 hardness of 200 according to Table 3 has the property class designation 200HV.The designation system of this document may be applied for sizes outside its scope (e.g. for washers with thickness t 12 mm) provided all applicable requirements in accordance with Tables 2 and 3 are met.Although a great

48、number of property classes is specified in this document, this does not mean that all property classes are appropriate for all washers and/or for all bolts/nuts/washers assemblies. The combination of property classes for flat washers with bolts, screws, studs and nuts is specified in Table 1.2 ISO 2

49、018 All rights reservedBS EN ISO 8983:2018ISO 8983:2018Table 1 Combination of property classes of flat washers (e.g. plain washers) with property classes of bolts, screws, studs and nutsThreaded fasteners in accordance with ISO 8981 and ISO 8982 Mating property classes for flat washersProperty classes100HV 200HVa300HVa380HVb,cBolts, screws and studs Regular and high nuts4.6, 4.8, 5.6, 5.8 5 RCe e e e6.8 6d,eRCe e e8.8 8 fRCe e e9.8, 10.9