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1、–Entwurf–EDINENISO898-3:2017-03DRAFTINTERNATIONALSTANDARDISO/DIS898-3:2017(E)Mechanicalpropertiesoffastenersmadeofcarbonsteelandalloysteel—Part3:Washers1ScopeThispartofISO898specifiesmechanicalandphysicalpropertiesofflatwashers,designedtobeusedinboltedjointsincombinationwithbolts,screws,
2、studsandnutswithaspecifiedpropertyclassinaccordancewithISO898-1andISO898-2.NOTE1Thesetypesofwashersmayalsobeusedwithotherfastenerssuchasscrewsformingtheirownmatingthread.WashersthatconformtotherequirementsofthispartofISO898areevaluatedatanambienttemperaturerangeof10°Cto35°C.Thesewashersa
3、reusedinapplicationsatloworelevatedtemperaturesuptoamaximumtemperatureof+300°C,howeverseeNote2.NOTE2Whendeterminingappropriatechoicesforagivenapplication,usersareadvisedtoconsultanexperiencedfastenerexpertforsevereenvironmentalapplicationsincludingtemperaturesoutsidetherangeof−50°Cto+150
4、°C.ThispartofISO898isapplicabletothefollowingflatcaptiveandnon-captivewashersmadeofcarbonsteeloralloysteel,withthicknessfrom0,2mmto12mm:—plainwashers(withorwithoutknurls,ribbedorchamfers);—squarewashers;—squareholewashers;—shapedplates.Itdoesnotspecifyrequirementsforsuchpropertiesas:—cor
5、rosionresistance;—weldability.NOTE3Whendesigningcriticalapplications,usersareadvisedtoconsultafastenerexpert.2NormativereferencesThefollowingdocuments,inwholeorinpart,arenormativelyreferencedinthisdocumentandareindispensableforitsapplication.Fordatedreferences,onlytheeditioncitedapplies.
6、Forundatedreferences,thelatesteditionofthereferenceddocument(includinganyamendments)applies.ISO898-1,Mechanicalpropertiesoffastenersmadeofcarbonsteelandalloysteel—Part1:Bolts,screwsandstudswithspecifiedpropertyclasses—CoarsethreadandfinepitchthreadISO898-2,Mechanicalpropertiesoffasteners
7、madeofcarbonsteelandalloysteel—Part2:Nutswithspecifiedpropertyclasses—CoarsethreadandfinepitchthreadISO6507-1,Metallicmaterials—Vickershardnesstest—Part1:Testmethod©ISO2017–Allrightsreserved1EDINENISO898-3:2017-03–Entwurf–ISO/DIS898-3:2017(E)ISO6508-1,Metallicmaterials—Ro
