ASTMA394TOWERBOLTSisstandardofboltsuseintheconstructionoftransmissiontowers, उपकेंद्रों,
andsimilarsteelstructures.Thereare3types: Type0includeshot-dipzinc-coatedboltsmadeoflowor
mediumcarbonsteel, Type1includeshot-dipzinc-coatedboltsmadeofmediumcarbonsteel, ठंडा
andtempered, Type2, andType3includesbare, ठंडा, andtemperedboltsmadeofweatheringsteel।
Steelforthemanufactureofboltsshallbemadebyanyofthefollowingprocesses: खुले भट्ठी,
eletric-भट्ठी, orbasic-oxygen.Type1boltsproducedfrommediumcarbonsteelshallbequenchedin
aliquidmediumfromabovetheaustenizingtemperature.Type1boltsproducedfrommediumcarbonsteel
towhichchromium, निकल, मोलिब्डेनम, orboronwereintentionallyaddedshallbequenchedonlyinoil
fromabovetheaustenitizingtemperature.Type3boltsshallbequenchedonlyinoilfromabovethe
austenitizingtemperature.Cold-headedType0boltsshallbestressreliefannealedbeforezinccoatingto
removecoldworkeffectssuchthatthehardnessmeasuredanywhereonthesurfaceorthroughthe
पार sectionshallmeettherequirementspecified.Differenttestsshallbeconductedinordertodetermine
thefollowingmechanicalpropertiesofbolts: कठोरता, tensilestrength, andshearstrength।
RecommendedNutsforASTMA394TOWERBOLTS
Unlessotherwisespecified, allnutsontheseboltsshallbehexstyleandconformtotherequirementsof
SpecificationA563asfollows।
बोल्टटाइपनटग्रेड फिनिश
० एक गर्म-द्विअर्थी-लेपित
1 डीएच हॉट-डिपज़िन-कोटेड
3 डीएच 3 सादा
RecommendedWashersforASTMA394TOWERBOLTS
SuitablewashersforusewithType0arehot-dipzinc-coatedcarbon-steelwasherswithdimensionsthatare
inaccordancewithSpecificationF436.SuitablewashersforusewithType1boltsarehot-dipzinc में लिपटे
Type1hardened-steelwashersthatareinaccordancewithSpecificationF436।
SuitablewashersforusewithType3boltsareType3hardened-steelwashersthatareinaccordancewith
विशिष्टता
MaterialsandManufactureofASTMA394TOWERBOLTS
Steelforthemanufactureofboltsshallbemadebyanyofthefollowingprocesses: खुले भट्ठी,
बिजली भट्ठी, orbasic ऑक्सीजन।
HeatTreatmentofofASTMA394TOWERBOLTS
Type1boltsproducedfrommediumcarbonsteelshallbequenchedinaliquidmediumfromabovethe
austenizingtemperature.Type1boltsproducedfrommediumcarbonsteeltowhichchromium, निकल,
मोलिब्डेनम, orboronwereintentionallyaddedshallbequenchedonlyinoilfromabovetheaustenitizing
temperature.Type3boltsshallbequenchedonlyinoilfromabovetheaustenitizingtemperature।
ZincCoatings, HotDipofASTMA394TOWERBOLTS
Type0andType1boltsshallbehot-dipzinc-coatedaccordancewiththerequirementsofSpecification
A153 / A153M, exceptthattheminimumaverageweight (मोटाई) ofzinccoatingshallbe1.65oz / ft2
(0.0028in।) और।
