ASTMA394TOWERBOLTSisstandardofboltsuseintheconstructionoftransmissiontowers, alállomások,
andsimilarsteelstructures.Thereare3types: Type0includeshot-dipzinc-coatedboltsmadeoflowor
mediumcarbonsteel, Type1includeshot-dipzinc-coatedboltsmadeofmediumcarbonsteel, leállítjuk
andtempered, Type2, andType3includesbare, leállítjuk, andtemperedboltsmadeofweatheringsteel.
Steelforthemanufactureofboltsshallbemadebyanyofthefollowingprocesses: nyitott kandalló,
eletric-kemence, orbasic-oxygen.Type1boltsproducedfrommediumcarbonsteelshallbequenchedin
aliquidmediumfromabovetheaustenizingtemperature.Type1boltsproducedfrommediumcarbonsteel
towhichchromium, nikkel, molibdén, orboronwereintentionallyaddedshallbequenchedonlyinoil
fromabovetheaustenitizingtemperature.Type3boltsshallbequenchedonlyinoilfromabovethe
austenitizingtemperature.Cold-headedType0boltsshallbestressreliefannealedbeforezinccoatingto
removecoldworkeffectssuchthatthehardnessmeasuredanywhereonthesurfaceorthroughthe
cross-sectionshallmeettherequirementspecified.Differenttestsshallbeconductedinordertodetermine
thefollowingmechanicalpropertiesofbolts: keménység, tensilestrength, andshearstrength.
RecommendedNutsforASTMA394TOWERBOLTS
Unlessotherwisespecified, allnutsontheseboltsshallbehexstyleandconformtotherequirementsof
SpecificationA563asfollows.
BoltTypeNutGrade Finish
0 Meleg dipcinkkal bevont
1 DH-val meleg-dipzinc bevonattal
3 DH3 sima
RecommendedWashersforASTMA394TOWERBOLTS
SuitablewashersforusewithType0arehot-dipzinc-coatedcarbon-steelwasherswithdimensionsthatare
inaccordancewithSpecificationF436.SuitablewashersforusewithType1boltsarehot-dipzinc bevont
Type1hardened-steelwashersthatareinaccordancewithSpecificationF436.
SuitablewashersforusewithType3boltsareType3hardened-steelwashersthatareinaccordancewith
Leírás
MaterialsandManufactureofASTMA394TOWERBOLTS
Steelforthemanufactureofboltsshallbemadebyanyofthefollowingprocesses: nyitott kandalló,
elektromos kemence, orbasic-oxigén.
HeatTreatmentofofASTMA394TOWERBOLTS
Type1boltsproducedfrommediumcarbonsteelshallbequenchedinaliquidmediumfromabovethe
austenizingtemperature.Type1boltsproducedfrommediumcarbonsteeltowhichchromium, nikkel,
molibdén, orboronwereintentionallyaddedshallbequenchedonlyinoilfromabovetheaustenitizing
temperature.Type3boltsshallbequenchedonlyinoilfromabovetheaustenitizingtemperature.
ZincCoatings, HotDipofASTMA394TOWERBOLTS
Type0andType1boltsshallbehot-dipzinc-coatedaccordancewiththerequirementsofSpecification
A153 / A153M, exceptthattheminimumaverageweight (vastagság) ofzinccoatingshallbe1.65oz / ft2
(0,0028 in.) És a minimális tömegű benzin bevonat nem lehet 1,50 oz / ft2 (0,0025 in.).
