ASTMA394TOWERBOLTSisstandardofboltsuseintheconstructionoftransmissiontowers, rozvodne,
andsimilarsteelstructures.Thereare3types: Type0includeshot-dipzinc-coatedboltsmadeoflowor
mediumcarbonsteel, Type1includeshot-dipzinc-coatedboltsmadeofmediumcarbonsteel, rozloží
andtempered, Type2, andType3includesbare, rozloží, andtemperedboltsmadeofweatheringsteel.
Steelforthemanufactureofboltsshallbemadebyanyofthefollowingprocesses: open-vyhňa,
varnú-pec, orbasic-oxygen.Type1boltsproducedfrommediumcarbonsteelshallbequenchedin
aliquidmediumfromabovetheaustenizingtemperature.Type1boltsproducedfrommediumcarbonsteel
towhichchromium, nikel, molybdén, orboronwereintentionallyaddedshallbequenchedonlyinoil
fromabovetheaustenitizingtemperature.Type3boltsshallbequenchedonlyinoilfromabovethe
austenitizingtemperature.Cold-headedType0boltsshallbestressreliefannealedbeforezinccoatingto
removecoldworkeffectssuchthatthehardnessmeasuredanywhereonthesurfaceorthroughthe
cross-sectionshallmeettherequirementspecified.Differenttestsshallbeconductedinordertodetermine
thefollowingmechanicalpropertiesofbolts: tvrdosť, tensilestrength, andshearstrength.
RecommendedNutsforASTMA394TOWERBOLTS
Unlessotherwisespecified, allnutsontheseboltsshallbehexstyleandconformtotherequirementsof
SpecificationA563asfollows.
BoltTypeNutGrade Finish
0 Povlak zinkovaný ponorom
1 DH žiarovo zinkované
3 DH3 plain
RecommendedWashersforASTMA394TOWERBOLTS
SuitablewashersforusewithType0arehot-dipzinc-coatedcarbon-steelwasherswithdimensionsthatare
inaccordancewithSpecificationF436.SuitablewashersforusewithType1boltsarehot-dipzinc potiahnuté
Type1hardened-steelwashersthatareinaccordancewithSpecificationF436.
SuitablewashersforusewithType3boltsareType3hardened-steelwashersthatareinaccordancewith
špecifikácia
MaterialsandManufactureofASTMA394TOWERBOLTS
Steelforthemanufactureofboltsshallbemadebyanyofthefollowingprocesses: open-vyhňa,
elektrické pece, orbasic-kyslík.
HeatTreatmentofofASTMA394TOWERBOLTS
Type1boltsproducedfrommediumcarbonsteelshallbequenchedinaliquidmediumfromabovethe
austenizingtemperature.Type1boltsproducedfrommediumcarbonsteeltowhichchromium, nikel,
molybdénu, orboronwereintentionallyaddedshallbequenchedonlyinoilfromabovetheaustenitizing
temperature.Type3boltsshallbequenchedonlyinoilfromabovetheaustenitizingtemperature.
ZincCoatings, HotDipofASTMA394TOWERBOLTS
Type0andType1boltsshallbehot-dipzinc-coatedaccordancewiththerequirementsofSpecification
A153 / A153, exceptthattheminimumaverageweight (hrúbka) ofzinccoatingshallbe1.65oz / ft2
(0,0028in.) A minimálna váhafosfátového povlakuonancelu 1,50oz / ft2 (0,0025in.).
