F568M
APPENDIXES
(NonmandatoryInformation)
X1.CONVERSIONGUIDANCE
X1.1Forguidancepurposesonly,toassistdesignersandX1.1.5Class10.9mechanicalpropertiesareapproximately
purchasersintheselectionofapropertyclass,thefollowingequivalenttothoseofSpeci?cationA354,GradeBDand
conversionguidanceisprovided:Speci?cationA490,Types1and2.
X1.1.6Class10.9.3mechanicalpropertiesareapproxi-
X1.1.1Class4.6mechanicalpropertiesareapproximately
matelyequivalenttothoseofSpeci?cationA490,Type3.
equivalenttothoseofSpeci?cationA307,GradeA.
X1.1.7Class12.9mechanicalpropertiesareapproximately
X1.1.2Class8.8mechanicalpropertiesareapproximately
equivalenttothoseofSpeci?cationA449,andSpeci?cationequaltothoseofSpeci?cationA574.
A325,Types1and2.
X1.1.3Class8.8.3mechanicalpropertiesareapproximatelyX1.2Class9.8isapplicabletofastenersofnominalthread
equivalenttothoseofSpeci?cationA325,Type3.diametersM16andsmaller;Class8.8isapplicabletofasteners
X1.1.4Class9.8mechanicalpropertiesareapproximatelylargerthanM16,exceptforSpeci?cationA325Mboltswhere
9%higherthanthoseofSpeci?cationA449.M16andlargerboltdiametersareClass8.8.
X2.SIGNIFICANCEOFPROPERTYCLASSDESIGNATION
1
X2.1Propertyclassesaredesignatedbynumberswhereproximates?10oftheratio,expressedasapercentage,between
increasingnumbersgenerallyrepresentincreasingtensileminimumyieldstressandminimumtensilestrength.
strengths.Thedesignationsymbolhasthefollowingsigni?-
X2.1.3Thenumeral3,followingtheseconddecimalpoint,
cance:
isanindicatorthatthematerialhasatmosphericcorrosion
X2.1.1Theoneortwonumeralsprecedingthe?rstdecimal
resistanceandweatheringcharacteristicscomparabletosteels
1
pointapproximates?1000oftheminimumtensilestrengthin
coveredinSpeci?cationA588/A588M.
MPa.
X2.1.2Thenumeralfollowingthe?rstdecimalpointap-
SUMMARYOFCHANGES
Thissectionidenti?esthelocationofselectedchangestothisstandardthathavebeenincorporatedsincethe
–96issue.Fortheconvenienceoftheuser,CommitteeF-16hashighlightedthosechangesthatmayimpactthe
useofthisstandard.Thissectionmayalsoincludedescriptionsofthechangesorreasonsforthechanges,orboth.
(1)Table5,Classes8.8and8.8.3,deletedtheM16sizeand(3)Table5,Classes10.9and10.9.3,increasedthesizerange
addedafootnoteindicatingsizesM16andsmallerarenottoaddM64—M100.
coveredbySpeci?cationF568MandsuggestingClass9.8be
(4)Tables1and2,revisedtheNominalProductDiameter
used.
columntoalignwiththechangesinTable5.
(2)Table5,Classes8.8and8.8.3,increasedthesizerangeto
addM42—M80.
TheAmericanSocietyforTestingandMaterialstakesnopositionrespectingthevalidityofanypatentrightsassertedinconnection
withanyitemmentionedinthisstandard.Usersofthisstandardareexpresslyadvisedthatdeterminationofthevalidityofanysuch
patentrights,andtheriskofinfringementofsuchrights,areentirelytheirownresponsibility.
Thisstandardissubjecttorevisionatanytimebytheresponsibletechnicalcommitteeandmustbereviewedevery?veyearsand
ifnotrevised,eitherreapprovedorwithdrawn.Yourcommentsareinvitedeitherforrevisionofthisstandardorforadditionalstandards
andshouldbeaddressedtoASTMHeadquarters.Yourcommentswillreceivecarefulconsiderationatameetingoftheresponsible
technicalcommittee,whichyoumayattend.Ifyoufeelthatyourcommentshavenotreceivedafairhearingyoushouldmakeyour
viewsknowntotheASTMCommitteeonStandards,100BarrHarborDrive,WestConshohocken,PA19428.
8 |
|
