ASTMA394TOWERBOLTSisstandardofboltsuseintheconstructionoftransmissiontowers, fostáisiúin,
agussimilarsteelstructures.Thereare3types: Type0includeshot-dipzinc-coatedboltsmadeoflowor
múchadh meáncharbonsteel, Type1includeshot-dipzinc-coatedboltsmadeofmediumcarbonsteel, múchta
andtempered, Type2, agusType3includesbare, múchta, andtemperedboltsmadeofweatheringsteel.
Próisis Steelforthemanufactureofboltsshallbemadebyanyofthefollowingprocesses: teallach oscailte,
foirnéise eletric, orbasic-oxygen.Type1boltsproducedfrommediumcarbonsteelshallbequenchedin
aliquidmediumfromabovetheaustenizingtemperature.Type1boltsproducedfrommediumcarbonsteel
towhichchromium, nicil, moluibdín, orboronwereintentionallyaddedshallbequenchedonlyinoil
fromabovetheaustenitizingtemperature.Type3boltsshallbequenchedonlyinoilfromabovethe
austenitizingtemperature.Cold-headedType0boltsshallbestressreliefannealedbeforezinccoatingto
removecoldworkeffectssuchthatthehardnessmeasuredanywhereonthesurfaceorthroughthe
trasghearradhhallmemeettherequirementspecified.Differenttestsshallbeconductedinordertodetermine
thefollowingmechanicalpropertiesofbolts: cruas, tensilestrength, andshearstrength.
MoltaNutsforASTMA394TOWERBOLTS
Mura rud é go bhfuil sé sonraithe, allnutsontheseboltsshallbehexstyleandconformtotherequirementsof
SonraíochtA563asfollows.
Críochnaigh BoltTypeNutGrade
0 Brataithe te-dipzinc
1 DH-brataithe te-dipzinc
3 DH3 plain
MoltaWashersforASTMA394TOWERBOLTS
Feistiú oiriúnach le haghaidh úsáideType0arehot-dipzinc-brataithe le carbón-cruachwasherswithdimensionsthatare
inaccordancewithSpecificationF436.SuitablewashersforusewithType1boltsarehot-dipzinc-brataithe
Cineál1hardened-cruachwashersthatareinaccordancewithSpecificationF436.
Feistiú oiriúnach le haghaidh úsáideType3boltsareType3hardened-steelwashersthatareinaccordancewith
Sonraíocht
MaterialsandManufactureofASTMA394TOWERBOLTS
Próisis Steelforthemanufactureofboltsshallbemadebyanyofthefollowingprocesses: teallach oscailte,
foirnéise leictreach, orbasic-ocsaigine.
HeatTreatmentofofASTMA394TOWERBOLTS
Cineál1boltsproducedfrommediumcarbonsteelshallbequenchedinaliquidmediumfromabovethe
austenizingtemperature.Type1boltsproducedfrommediumcarbonsteeltowhichchromium, nicil,
moluibdín, orboronwereintentionallyaddedshallbequenchedonlyinoilfromabovetheaustenitizing
teocht.Type3boltsshallbequenchedonlyinoilfromabovetheaustenitizingtemperature.
ZincCoatings, HotDipofASTMA394TOWERBOLTS
Cineál0andType1boltsshallbehot-dipzinc-coatedaccordancewiththerequirementsofSpecification
A153 / A153M, seachas meáchan meáchan (tiús) ofzinccoatingshallbe1.65oz / ft2
(0.0028in.) Agus an t-íosmheáchanofzinccoatingonanyoneitemshallbe1.50oz / ft2 (0.0025in.).
