1、Designation: F3148 15Standard Specification forHigh Strength Structural Bolt Assemblies, Steel and AlloySteel, Heat Treated, 144ksi Minimum Tensile Strength, InchDimensions1This standard is issued under the fixed designation F3148; the number immediately following the designation indicates the year
2、oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers chemical, dimensional, physi-ca
3、l and mechanical requirements for quenched and temperedbolts manufactured from steel and alloy steel, in inch dimen-sions. The bolts are available as structural bolting assemblieswhich include a fixed spline bolt, a suitable nut and at least onewasher covered by reference herein.1.2 Intended Use:1.2
4、.1 Bolts manufactured under this specification, and struc-tural bolting assemblies supplied under this specification, areintended for use in structural connections covered in theSpecification for Structural Joints Using High-Strength Boltsand installed using the torque-and-angle or part turn/combine
5、dinstallation method.1.2.2 Structural bolting assemblies in this specification arefurnished in nominal diameters from12 to 1-14 in. inclusive.1.3 Classification:1.3.1 Structural bolting assemblies are designated as Grade144.1.3.2 Bolts are designated by type denoting raw materialchemical composition
6、.Type 1 - 144ksi - carbon steel, carbon boron steel, alloy steel or alloy steelwith boron additionType 3 - 144ksi - weathering steel1.4 Terms used in the specification are defined in Terminol-ogy F1789.1.4.1 Torque-and-Angle Fixed-Spline Structural Boltboltthat includes an integral fixed-spline end
7、which extends beyondthe threaded portion of the bolt and is used as a component ofa torque-and-angle fixed-spline structural bolting assembly.1.4.2 Torque-and-Angle Fixed-Spline Structural BoltingAssembly2 a fastener assembly comprised of a torque-and-angle fixed-spline bolt with a suitable nut and
8、at least onewasher, installed and tightened using a special electric wrenchand socket system which has an inner socket that engages thefixed-spline end of the bolt and with an outer socket thatengages and turns the nut, in two separate and distinctoperations, the first is a controlled torque applica
9、tion and thesecond is a specified angle.1.4.3 Combined MethodA tightening method comprisedof two steps, the first tightening step using a torque regulatingtool and the second tightening step in which a specified turn isapplied to the turned part of the assembly. Also known as thepart turn method.1.5
10、 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.1.6 ASTM Internati
11、onal takes no position respecting thevalidity of any patent rights asserted in connection with anyitem mentioned in this standard. Users of this standard areexpressly advised that determination of the validity of any suchpatent rights, and the risk of infringement of such rights, areentirely their o
12、wn responsibility.2. Referenced Documents2.1 ASTM Standards:3A563 Specification for Carbon and Alloy Steel Nuts1This specification is under the jurisdiction of ASTM Committee F16 onFasteners and is the direct responsibility of Subcommittee F16.02 on Steel Bolts,Nuts, Rivets and Washers.Current editi
13、on approved Aug. 1, 2015. Published September 2015. DOI:10.1520/F3148-152The torque-and-angle fixed-spline structural bolting system has a patentapplication pending. Interested parties are invited to submit information regardingthe identification of an alternative(s) to this patent-pending item to t
14、he ASTMInternational Headquarters. Your comments will receive careful consideration at ameeting of the responsible technical committee, which you may attend.3For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of AS
15、TMStandards volume information, refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1A751 Test Methods, Practices, and Terminology for Chemi-cal Analysis of Steel ProductsB695
16、 Specification for Coatings of Zinc Mechanically De-posited on Iron and SteelE709 Guide for Magnetic Particle TestingE1444/E1444M Practice for Magnetic Particle TestingF436 Specification for Hardened Steel WashersF606/F606M Test Methods for Determining the MechanicalProperties of Externally and Inte
17、rnally ThreadedFasteners, Washers, Direct Tension Indicators, and RivetsF788 Specification for Surface Discontinuities of Bolts,Screws, and Studs, Inch and Metric SeriesF1136/F1136M Specification for Zinc/Aluminum CorrosionProtective Coatings for FastenersF1470 Practice for Fastener Sampling for Spe
18、cified Me-chanical Properties and Performance InspectionF1789 Terminology for F16 Mechanical FastenersF2328 Test Method for Determining Decarburization andCarburization in Hardened and Tempered Threaded SteelBolts, Screws, Studs, and NutsF2833 Specification for Corrosion Protective Fastener Coat-ing
19、s with Zinc Rich Base Coat and Aluminum Organic/Inorganic TypeG101 Guide for Estimating the Atmospheric Corrosion Re-sistance of Low-Alloy Steels2.2 ASME Standards:4B 1.1 Unified Screw ThreadsB 18.2.6 Fasteners for Use in Structural ApplicationsB 18.18 Quality Assurance for Fasteners2.3 RCSC:5Specif
20、ication for Structural Joints Using High-StrengthBolts3. Ordering Information3.1 Orders for structural bolting assemblies under thisspecification shall include:3.2 Mandatory ordering information:3.2.1 ASTM F3148 designation and revision,3.2.2 QuantityNumber of assemblies,3.2.3 Grade 144,3.2.4 SizeIn
21、cluding nominal diameter and bolt length,3.2.5 TypeType 1 or Type 3. When Type is not specifiedeither Type 1 or Type 3 may be furnished at the suppliersoption.3.2.6 Coatings or finishesIf other than plain finish, specifythe coating process or finish required, see Table 1.3.3 Additional ordering info
22、rmation when specified by pur-chaser;3.3.1 Test reports, see Section 15.3.3.2 Additional details of other assembly components.3.3.3 Rotational capacity testing of assemblies per AnnexA1.3.3.4 Observation or inspection requirements. See 14.2.3.3.5 Country of origin.3.3.6 Supplementary requirements.NO
23、TE 1A typical description follows: 1000 pieces34-10 3 in.ASTM F3148-15, Grade 144, Type 1, each with one hardened ASTMF436 Type 1 washer, and one A563 Grade DH heavy hex nut.4. Dimensions4.1 Head and Body:4.1.1 Bolts shall be round head conforming to the dimen-sions specified in Table 2.4.1.2 The th
24、read length shall not be changed except asprovided in Supplementary Requirement S1. Other dimensionsshall not be changed.4.2 Threads:4.2.1 Uncoated bolt threads shall be as specified in Table 2.4Available from American Society of Mechanical Engineers (ASME), ASMEInternational Headquarters, Two Park
25、Ave., New York, NY 10016-5990, http:/www.asme.org.5Research Council on Structural Connections (RCSC) http:/www.boltcouncil.org/TABLE 1 Permitted CoatingsGB695A,FF1136/F1136MD,FF2833E,FBolt Class 55 Grade 3 Grade 1Nut Class 55 Grade 5 Grade 1Washer Class 55 Grade 3 Grade 1Bolt Pitch Bolt Pitch Bolt P
26、itchNut Pitch Dia. OS After Nut Pitch Dia. OS After Nut Pitch Dia. OS AfterOvertap CoatingCOvertapBCoatingCOvertapBCoatingCin. in. in. in. in. in.12-13 UNC 0.018 0.012 0.009 0.006 0.009 0.00658-11 UNC 0.020 0.013 0.010 0.007 0.010 0.00734-10 UNC 0.020 0.013 0.010 0.007 0.010 0.00778-9 UNC 0.022 0.01
27、5 0.011 0.008 0.011 0.0081-8 UNC 0.024 0.016 0.012 0.008 0.012 0.008118-7 UNC 0.024 0.016 0.012 0.008 0.012 0.008114-7 UNC 0.024 0.016 0.012 0.008 0.012 0.008ASupplementary nut lubrication to A563 S1, S2 or S3 is required for mechanically deposited zinc coatings.BNut overtap shall not exceed this am
28、ount unless agreed upon between the purchaser and user. If a larger overtap is used or required, coated bolts and overtapped andcoated nuts shall pass the RC test requirements per F3148, Annex A1 as proof of assembly, ductility and thread strength.CBolt pitch oversize limit in case of dispute. Mater
29、ial within the plain gage limits which meets the coating thickness requirements and assembles freely need not bemeasured to this tolerance.DGrade 5 of this coating meets the supplementary lubrication requirements of A563 S1.EGrade 1 of this coating meets the supplementary lubrication requirements of
30、 A563 S1.FNuts overtapped for coating shall be proof load tested to a minimum of 175 000 psi.GOther finishes specify other protective finish, if required.OS= OversizeF3148 1524.2.2 Coated bolt threads shall be as specified in Table 2before coating.4.3 The gauging limit for coated bolts shall be veri
31、fiedduring manufacture. In case of dispute, a calibrated thread ringgauge of the same size as the oversize limit in Table 1 (ClassX tolerance, gauge tolerance plus) shall be used to verifyconformance. The gauge shall assemble with hand effortfollowing application of light machine oil to prevent gall
32、ingand damage to the gauge. These inspections, when performedto resolve controversy, shall be conducted at the frequencyspecified in the quality assurance provisions ofASME B 18.18.NOTE 2It is the intent of this specification that coated nuts and boltsassemble freely when ordered together. It is rec
33、ognized that the batchnature of coating processes and the cumulative effect of coating thicknessmay create intermittent assembly problems.5. Product Marking5.1 At a minimum all assemblies shall be marked asrequired in Table 2. Marking shall be on the bolt head and shallbe raised or depressed, at the
34、 manufacturers option. Themarking shall be visible after coating.5.2 Grade/Type marking, the manufacturers mark, and theprivate label distributors mark (if used), shall be in separateand distinct locations.6. Chemical Composition6.1 Type 1 bolts shall be carbon steel, carbon boron steel,alloy steel
35、or alloy steel with Boron addition at the manufac-turers option, conforming to the chemical composition speci-fied in Table 3.6.2 Type 3 bolts shall be weathering steel and shall conformto the chemical compositions A or B specified in Table 3.Optionally, the chemical composition may have a Corrosion
36、Index of 6 or greater, as calculated from the HeatAnalysis, andas described in Guide G101 Guide for Estimating the Atmo-spheric Corrosion Resistance of Low-Alloy Steels.6.3 Product analysis made on finished bolts representingeach lot shall conform to the product analysis requirementsspecified in Tab
37、le 3, Footnote A.6.4 Heats to which bismuth, selenium, tellurium, or lead hasbeen intentionally added shall not be permitted.6.5 Chemical analysis shall be performed in accordancewith Test Methods, Practices, and TerminologyA751.7. Materials and Manufacture7.1 Structural bolting assemblies shall be
38、certified, suppliedand installed as matched sets. These assemblies shall becapable of developing a minimum predetermined initial andfinal tension when installed using an appropriate fixed spline-drive installation tool. See Appendix X1.7.2 Production Method:7.2.1 Bolts shall be cold formed, warm for
39、med, hot formed,hot forged, machined, or any combination thereof.7.3 Heat Treatment:7.3.1 All Bolts shall be quenched in oil from the austenitiz-ing temperature.7.3.2 All Bolts shall be tempered by reheating to not lessthan 800F/427C.7.4 Threads shall be rolled or cut.TABLE 2 Dimensions, Threads, Ma
40、rking, and MatchingComponentsType 1 Type 3Round Head Dimensions,ASMEAB18.2.6 B18.2.6Thread Fit, ASME B1.1 UNC 2A B1.1 UNC 2AGrade Marking 144 144Nut A563 DH A563 DH3Flat Washer F436 1 F436 3AAll dimensions except spline geometryTABLE 3 Chemical RequirementsAType 1 Type 3Heat Analysis Carbon Steel wi
41、th orwithoutAlloy Steel with orwithoutComposition Composition Based on CorrosionBoron Boron A B IndexBCarbon 0.30 0.52 0.30 0.48 0.33 0.40 0.38 0.48 0.30 0.52Manganese 0.60 min 0.60 min 0.90 1.20 0.70 0.90 0.60 minPhosphorus, max 0.035 0.035 0.035 0.035 0.035Sulfur, max 0.040 0.040 0.040 0.040 0.040
42、Silicon 0.10 0.30 0.15 0.30 0.30 0.50 Boron, max 0.003 0.003 Copper 0.25 0.45 0.20 0.40 0.20 0.60BNickel 0.25 0.45 0.50 0.80 0.20B,CminChromium 0.45 0.65 0.50 0.75 0.45BminMolybdenum 0.06 max 0.15B,CminAIndividual product analysis that is outside the specified range is permitted provided it is withi
43、n 10% of the value required of the heat analysis.BType 3 bolts conforming to composition A or B, or type 3 bolts which have a copper minimum Heat Analysis of 0.20% and a Corrosion Index of 6 or higher as calculatedfrom the Heat Analysis as described in Guide G101 Predictive method shall be acceptedC
44、Either Nickel or Molybdenum must be present in the amount specified.F3148 1537.5 Coatings and Other Finishes:7.5.1 Coatings, including supplementary lubrication and nutoversize requirements are provided in Table 1.7.5.2 When coated assemblies are required, the purchasershall specify the coating proc
45、ess and any additional specialrequirements.7.5.3 Threaded components of assemblies (bolts and nuts)shall be coated by the same process, limited to one process peritem with no mixed processes in a component lot.7.5.4 Nut and washer components of the assemblies shall bein accordance with Table 2.7.6 S
46、econdary Processing:7.6.1 Lot control and full traceability shall be maintainedthroughout all outside or secondary processes.7.6.2 Lots to which secondary processing has been per-formed by any party after sale from the manufacturer must betraceable using a lot number which differs from the manufac-t
47、urers original lot number.7.6.3 If processing that can affect mechanical or perfor-mance properties is performed after initial testing, the bolts orassemblies, or both, shall be retested for all specified mechani-cal properties and performance requirements affected by theprocessing.7.6.4 When the se
48、condary process is heat treatment, thebolts shall be tested for all specified mechanical properties.7.6.5 Secondary processing, including lubrication, by anyparty other than that which certified the assembly lot shall notbe permitted unless under the direction of the manufacturer orresponsible party
49、.7.7 Lubrication:7.7.1 Assemblies shall have at least one component lubri-cated by the responsible party to meet the assembly lot tensionrequirements.8. Testing and Lot Control8.1 Testing Responsibility:8.1.1 Each lot shall be tested by the responsible party priorto shipment in accordance with the lot control and identifica-tion quality assurance plan in 8.2 through 8.5.8.2 Bolts shall be processed in accordance with a lot controland identification quality assurance plan. The manufacturer,secondary proc
