Designation:A649/A649M−10(Reapproved2015)StandardSpecificationforForgedSteelRollsUsedforCorrugatingPaperMachinery1ThisstandardisissuedunderthefixeddesignationA649/A649M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecification2coverstwokindsofrollsusedinmachineryforproducingcorrugatedpaperboard.Rollsarefabricatedofforgedbodiesandtrunnions.Thetrunnionsmaybeboltedorshrinkassembledononeorbothendsofthebody.Asealweldmaybemadeatthebody/trunnioninterface.Rollshellsaremadeofcarbon/manganese,orlowalloysteelashereinafterdescribed,andareheattreatedpriortoassembly.PressurerollsmaybeorderedsurfacehardenedasConditionH,orwithoutsurfacehardeningasConditionS.ProvisionismadeinSupplementaryRequirementsS1andS3fortheoptionalsurfacehardeningofcorrugatingrolls.1.2Corrugatingandpressurerollsmadetothisspecificationshallnotexceed30in.[760mm]ininsidediameter.Thewallthicknessoftherollbodyshallnotbelessthan1⁄12oftheinsidediameteror1in.[25mm],whicheverisgreater,butshallnotexceed4in.[100mm].Thewallthicknessofthecorrugatingrollismeasuredatthebottomofthecorrugationsinthelocationofthetrunnionfit.Themaximumdesigntemperature(MDT)oftherollis600°F[315°C]andthemaximumallowableworkingpressure(MAWP)is250psi[1.7MPa].Theminimumdesigntemperatureshallbe40°F[4°C]forrollwallthicknessesupto3in.[75mm].Forrollwallthicknessesover3in.[75mm]to4in.[100mm],theminimumdesigntemperatureshallbe120°F[50°C].Themaximumstressesontherollbodiesfromthecombinedinternalandexternalloadingarelimitedto18750psi[129MPa]fortheClass2pressurerollbodies,and20000psi[138MPa]forClass1A,1B,or5pressureorcorrugatingrollbodiesinGrades1or2.Forthetrunnions,themaximumstressesfromthecombinedinternalandexternalloadingarelimitedto15000psi[103.4MPa]forClasses3or4,or20000psi[138MPa]forClasses1A,1B,or5inGrade2only.TheGrade1...
