StandardSpecificationfor
Hot-RolledStructuralSteel,High-StrengthLow-AlloyPlatewithImprovedFormability1ThisstandardisissuedunderthefixeddesignationA656/A656M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.
1.Scope*
1.1Thisspecificationcoverstwotypesandfourstrengthgradesofhigh-strengthlow-alloy,hotrolledstructuralsteelplateforuseintruckframes,brackets,cranebooms,railcars,andsimilarapplications.Steelsthatconformtothisspecifica-tionofferimprovedformability.Thesesteelsarenormallyfurnishedintheas-rolledcondition.Thetypeandstrengthgradefurnishedisasagreeduponbetweenthemanufacturerandthepurchaser.Thetypesandstrengthgradesareshowninthetables.
1.2Themaximumthicknessofplatesshallbeasfollows:
Grade50607080
PlateThickness,max
in.[mm]2[50]11⁄2[40]1[25]3⁄4[20]
3.GeneralRequirementsforDelivery
3.1PlatesfurnishedunderthisspecificationshallconformtotherequirementsofthecurrenteditionofSpecificationA6/A6M,forthespecificplateordered,unlessaconflictexists,inwhichcasethisspecificationshallprevail.
3.2Coilsareexcludedfromqualificationtothisspecifica-tionuntiltheyareprocessedintofinishedplates.Platesproducedfromcoilmeansplatesthathavebeencuttoindividuallengthsfromacoil.Theprocessordirectlycontrols,orisresponsiblefor,theoperationsinvolvedintheprocessingofacoilintofinishedplates.Suchoperationsincludedecoiling,leveling,cuttingtolength,testing,inspection,conditioning,heattreatment(ifapplicable),packaging,marking,loadingforshipment,andcertification.
NOTE1—Forplatesproducedfromcoilandfurnishedwithoutheattreatmentorwithstressrelievingonly,twotestresultsaretobereportedforeachqualifyingcoil.AdditionalrequirementsregardingplateproducedfromcoilaredescribedinSpecificationA6/A6M.
1.3Thevaluesstatedineitherinch-poundunitsorSIunitsaretoberegardedasstandard.Withinthetext,theSIunitsareshowninbrackets.Thevaluesstatedineachsystemarenotexactequivalents;therefore,eachsystemmustbeusedinde-pendentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnonconformancewiththisspecification.SeeAppendixX3ofSpecificationA6/A6Mforinformationonweldability.
1.4Forplatesproducedfromcoilandfurnishedwithoutheattreatmentorwithstressrelievingonly,theadditionalrequirements,includingadditionaltestingrequirementsandthereportingofadditionaltestresults,ofSpecificationA6/A6Mapply.
2.ReferencedDocuments2.1ASTMStandards:
A6/A6MSpecificationforGeneralRequirementsforRolledStructuralSteelBars,Plates,Shapes,andSheetPiling2ThisspecificationisunderthejurisdictionofASTMCommitteeA01onSteel,StainlessSteel,andRelatedAlloysandisthedirectresponsibilityofSubcommitteeA01.02onStructuralSteelforBridges,Buildings,RollingStock,andShips.
CurrenteditionapprovedApril10,2003.PublishedJune2003.Originallypublishedin1972.Lastpreviouseditionapprovedin2000asA656/A656M–00a.2AnnualBookofASTMStandards,Vol01.04.
14.MaterialsandManufacture
4.1Thesteelshallbemadetofinegrainpractice.5.ChemicalComposition
5.1Heatanalysesshallconformtothechemicalrequire-mentsgiveninTable1.Dependentuponthickness,grade,andintendedapplication,variationsinthechemicalcompositionarepermittedwithinthelimitsgiveninTable1fortheapplicabletype.Whereitisofparticularimportance,themanufacturershouldbeconsultedforspecificchemicalcom-position.
5.2ProductAnalysis—Ifaproductanalysisismade,itshallconformtotherequirementsgiveninTable1,subjecttotheproductanalysistolerancesofSpecificationA6/A6M.
5.3Wheresteelistobewelded,itispresupposedthataweldingproceduresuitableforthegradeofsteelandintendeduseorservicewillbeutilized.
5.4Unlessspecificallyordered,thetypeisatthediscretionoftheproducer.
6.TensionTest
6.1TheplatesasrepresentedbythetestspecimensshallconformtotherequirementsgiveninTable2.
*ASummaryofChangessectionappearsattheendofthisstandard.
Copyright©ASTMInternational,100BarrHarborDrive,POBoxC700,WestConshohocken,PA19428-2959,UnitedStates.
1
TABLE1ChemicalRequirements
Elements
Composition,%
Type30.181.650.0250.0350.600.080.020
0.008–0.10
Type70.181.650.0250.0350.600.15A0.020
0.10maxACarbon,maxManganese,maxPhosphorus,maxSulfur,maxSilicon,maxVanadiumNitrogenColumbium
AThecontentsofcolumbiumandvanadiumshalladditionallybeinaccordancewithoneofthefollowing:columbium0.008-0.10%withvanadium<0.008%;columbium<0.008%withvanadium0.008-0.15%;or
columbium0.008-0.10%withvanadium0.008-0.15%andcolumbiumplusvanadiumnotinexcessof0.20%.
TABLE2TensileRequirementsAGrade50[345]
Yieldpoint,min,ksi[MPa]Tensile
strength,min,ksi[MPa]Elongationin8in.[200mm],min,%BElongationin2in.[50mm],min,%BABGrade60[415]60[415]
Grade70[485]70[485]
Grade80[550]80[550]
50[345]
60[415]70[485]80[550]90[620]
20171412
23201715
SeeSpecimenOrientationundertheTensionTestssectionofSpecificationA6/A6M.
Forplateswiderthan24in.[600mm],theelongationrequirementisreducedtwopercentagepointsforGrade50[345]andthreepercentagepointsforGrades60,70,and80[415,485,and550].SeeElongationRequirementAdjustmentsintheTensionTestssectionofSpecificationA6/A6M.
7.Keywords
7.1high-strengthlow-alloysteel;steelplates;structuralapplications
SUMMARYOFCHANGES
CommitteeA01hasidentifiedthelocationofselectedchangestothisstandardsincethelastissue(A656/A656M-00a)thatmayimpacttheuseofthisstandard.
(1)1.1,1.4,Section3,andSection6havebeenrevisedtobeconsistentwiththeterminologyandrequirementsofSpecifi-cationA6/A6M.
ASTMInternationaltakesnopositionrespectingthevalidityofanypatentrightsassertedinconnectionwithanyitemmentionedinthisstandard.Usersofthisstandardareexpresslyadvisedthatdeterminationofthevalidityofanysuchpatentrights,andtheriskofinfringementofsuchrights,areentirelytheirownresponsibility.Thisstandardissubjecttorevisionatanytimebytheresponsibletechnicalcommitteeandmustbereviewedeveryfiveyearsandifnotrevised,eitherreapprovedorwithdrawn.YourcommentsareinvitedeitherforrevisionofthisstandardorforadditionalstandardsandshouldbeaddressedtoASTMInternationalHeadquarters.Yourcommentswillreceivecarefulconsiderationatameetingoftheresponsibletechnicalcommittee,whichyoumayattend.IfyoufeelthatyourcommentshavenotreceivedafairhearingyoushouldmakeyourviewsknowntotheASTMCommitteeonStandards,attheaddressshownbelow.ThisstandardiscopyrightedbyASTMInternational,100BarrHarborDrive,POBoxC700,WestConshohocken,PA19428-2959,UnitedStates.Individualreprints(singleormultiplecopies)ofthisstandardmaybeobtainedbycontactingASTMattheaboveaddressorat610-832-9585(phone),610-832-9555(fax),orservice@astm.org(e-mail);orthroughtheASTMwebsite(www.astm.org).
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