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1、USSRSTATESTANDARDALLOYEDCONSTRUCTIONSTEELSPECIFICATIONSGOST4543–71OfficialEditionUSSRSTATECOMMITTEEFORSTANDARDSMoscowGroupB32USSRSTATESTANDARDALLOYEDCONSTRUCTIONSTEELGOSTSpecifications4543–71OKP(All-UnionProductClassificationCode)095040Termfrom01.01.73to01.01.95regardingthe
2、firstcategory,until01.01.90FailuretocomplywiththisStandardwillresultinlegalproceedingsThisStandardappliestoalloyedconstructionhot-rolledandforgedgaugedsteelwithdiameterorthicknessupto250mm,andsteelwithaspecialsurfacefinish,usedinathermallytreatedconditionandproducedinthefor
3、mofbars,stripsandhanks.RegardingthestandardsforchemicalcompositionthisStandardappliestoallothertypesofrolledstock,ingots,andforgedandpunchedpieces.Theindicatorsoftechnologicallevel,establishedbythisStandard,shallbestipulatedforpremiumandfirstcategoriesofquality.Therolledsto
4、ckwithstandardizedqualityindicatorsshallbeconsideredaspremiumcategoryofquality.(AmendedWording,AmendmentsNos.1,2and4).1.CLASSIFICATION1.1.Dependingonchemicalcompositionandproperties,structuralsteelshallbedividedintocategories:quality;highquality-A;extrahighquality-Ш.Notes:1
5、.Thesteelofelectroslagremeltshallbeconsideredasextrahighqualitysteel.2.(Removed,AmendmentNo.2).OfficialEditionReprintingisprohibitedH*SeeNotesof“STANDARTINFORM”attheendofthisStandard©StandardsPublishingHouse,1988©STANDARTINFORM,2008p.2GOST4543-711.2.Dependingonthebasicalloy
6、ingelements,steelshallbesubdividedintogroups:chromium,manganese,chromomanganese,chromosiliceous,chromomolybdenumandchromomolybdenum-vanadium,chromovanadium,nickel-molybdenum,chromonickelandchromonickelwithboron,chromosilicomanganeseandchromosilicomanganese-nickel,chromomang
7、anese-nickelandchromomanganese-nickelwithtitaniumandboron,chromonickel-molybdenum,chromonickel-molybdenum-vanadiumandchromonickel-vanadium,chromoaluminumandchromoaluminumwithmolybdenum,chromomanganese-nickelwithmolybdenumandtitanium.(AmendedWording,AmendmentNo.3).1.3.Depend
8、ingontreatmentmode,thesteelshallbedividedinto:hot-rolledandforged(includingsteelwi
