1、AN AMERICAN NATIONAL STANDARD ASME B18.31.3-2014(Revision of ASME B18.31.3-2009)Threaded Rods (Inch Series)ASME B18.31.3-2014(Revision of ASME B18.31.3-2009)Threaded Rods(Inch Series)AN AMERICAN NATIONAL STANDARDTwo Park Avenue New York, NY 10016 USADate of Issuance: March 12, 2015This Standard will
2、 be revised when the Society approves the issuance of a new edition.ASME issues written replies to inquiries concerning interpretations of technical aspects of thisStandard. Interpretations are published on the Committee Web page and undergo.asme.org/InterpsDatabase. Periodically certain actions of
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7、ment that provides an opportunity for additional public input from industry, academia,regulatory agencies, and the public-at-large.ASME does not “approve,” “rate,” or “endorse” any item, construction, proprietary device, or activity.ASME does not take any position with respect to the validity of any
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11、ystem or otherwise,without the prior written permission of the publisher.The American Society of Mechanical EngineersTwo Park Avenue, New York, NY 10016-5990Copyright 2015 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.CONTENTSForeword ivCommittee Roster . vCorresp
12、ondence With the B18 Committee vi1 Introduction. 12 General Data 1Figure1 Threaded Rod Dimensions . 2Table1 Inch Threaded Rod Sizes . 3iiiFOREWORDThere was significant interest in developing this Standard due to the antidumping investigationby the U.S. Department of Commerce and the U.S. Internation
13、al Trade Commission that washappening simultaneously. The investigation resulted in antidumping tariffs being applied to asignificant portion of threaded rod that is used in the United States. Members of the subcommitteerecognized that there would be a lot of new threaded rod manufacturers appearing
14、 in the marketand that the industry needed a standard to reference on purchasing documents. The FastenerIndustry Education Group cites referencing standards as one of the most important criteria forpreventing poor quality or wrong product from entering the supply chain.The first edition of this Stan
15、dard was approved as an American National Standard onNovember 10, 2009.This revision incorporates the following technical changes. For quality assurance, ASME B18.18replaces the superseded ASME B18.18.2. Additional materials for threaded rod have been addedand provision is made to allow users to ord
16、er materials not specifically covered. Stainless steelis used to identify corrosion-resistant steel fasteners previously identified as CRES. ASTM F1554,Grade 105 that is increasingly replacing ASTM A449 has been added. ASTM A354 and SAE J429,Grade 8 covering higher-strength steels were added. Hot-di
17、p zinc coating in accordance withASTM F2329 was added as a finish choice. A statement has been added that tensile and yieldtests can be conducted on specimens of 3 nominal diameters or greater in length as some of thereferenced material specifications may require testing of full length specimens. Ta
18、ble 1 was addedto show the nominal sizes (diameters) for inch-size rods with UNC, UNF, 8UN, and Acme threadconfigurations.This revision was approved by the American National Standards Institute on November 10, 2014.ivASME B18 COMMITTEEStandardization of Bolts, Nuts, Rivets, Screws,Washers, and Simil
19、ar Fasteners(The following is the roster of the Committee at the time of approval of this Standard.)STANDARDS COMMITTEE OFFICERSJ. Greenslade, ChairD. S. George, Vice ChairW. H. King, Vice ChairC. J. Gomez, SecretarySTANDARDS COMMITTEE PERSONNELV. Cartina, Nylok, LLCL. Claus, Contributing Member, NN
20、I Training and Consulting, Inc.D. A. Clever, Contributing Member, ConsultantA. P. Cockman, Ford Motor Co.C. A. D. de la Garza, TSP, Inc.D. S. George, Ramco SpecialtiesC. J. Gomez, The American Society of Mechanical EngineersJ. Greenslade, Industrial Fasteners InstituteJ. J. Grey, Contributing Member
21、, Fastener Consulting Services, Inc.A. Herskovitz, Contributing Member, ConsultantJ. C. Jennings, Contributing Member, Naval Surface Warfare CenterSUBCOMMITTEE 31 THREADED STUDSC. A. D. de la Garza, Chair, TSP, Inc.T. Anderson, Vice Chair, Bay BoltJ. F. Braden, Fasteners UnlimitedD. A. Clever, Contr
22、ibuting Member, ConsultantJ. Finnegan, Safety Socket LLCD. S. George, Ramco SpecialtiesJ. Greenslade, Industrial Fasteners InstituteA. Herskovitz, ConsultantJ. C. Jennings, Naval Surface Warfare CentervW. H. King, Fastenal Co.D. Korneffel, Contributing Member, Cadenas PARTsolutionsJ. F. McCarrick, D
23、efense Supply Center PhiladelphiaM. D. Prasad, Contributing Member, GlobalM however, they shouldnot contain proprietary names or information.Requests that are not in this format may be rewritten in the appropriate format by the Committeeprior to being answered, which may inadvertently change the int
24、ent of the original request.ASME procedures provide for reconsideration of any interpretation when or if additionalinformation that might affect an interpretation is available. Further, persons aggrieved by aninterpretation may appeal to the cognizant ASME Committee or Subcommittee. ASME does not“ap
25、prove,” “certify,” “rate,” or “endorse” any item, construction, proprietary device, or activity.Attending Committee Meetings. The B18 Standards Committee regularly holds meetingsand/or telephone conferences that are open to the public. Persons wishing to attend any meetingand/or telephone conference
26、 should contact the Secretary of the B18 Standards Committee. FutureCommittee meeting dates and locations can be found on the Committee Page atgo.asme.org/B18committee.viASME B18.31.3-2014THREADED RODS (INCH SERIES)1 INTRODUCTION1.1 ScopeThis Standard covers the general and dimensionaldata for inch
27、series threaded rods. Included are the fol-lowing thread configurations and diameters:(a) UNC threads #4 through 4 in.(b) UNF threads #4 through 112in.(c) 8UN threads 118in. through 4 in.(d) Acme threads14in. through 5 in.At this time, there are no ISO standards for inchthreaded rods.The inclusion o
28、f dimensional data in this Standard isnot intended to imply that all of the products describedherein are stock production sizes. Consumers shouldconsult with suppliers concerning lists of stock produc-tion sizes.1.2 DimensionsAll dimensions in this Standard are in inches, unlessotherwise specified.1
29、.3 TerminologyFor definitions of terminology not specifically definedin this Standard, refer to ASME B18.12.1.4 Referenced StandardsUnless otherwise specified, the standards referencedshall be the most recent at the time of order placement.ASME B1.1, Unified Inch Screw Threads (UN andUNR Thread Form
30、)ASME B1.3, Screw Thread Gaging Systems forAcceptability: Inch and Metric Screw Threads (UN,UNR, UNJ, M, and MJ)ASME B1.5, Acme Screw ThreadsASME B18.12, Glossary of Terms for MechanicalFastenersASME B18.18, Quality Assurance for FastenersPublisher: The American Society of MechanicalEngineers (ASME)
31、, Two Park Avenue, New York, NY10016-5990; Order Department: 22 Law Drive, P.O. Box2900, Fairfield, NJ 07007-2900 (www.asme.org)ASTM A193/A193M, Standard Specification forAlloy-Steel and Stainless Steel Bolting Materials forHigh Temperature or High Pressure Service and OtherSpecial Purpose Applicati
32、ons1ASTM A307, Standard Specification for Carbon SteelBolts, Studs, and Threaded Rod 60 000 PSI TensileStrengthASTM A354, Standard Specification for Quenched andTempered Alloy Steel Bolts, Studs, and OtherExternally Threaded FastenersASTM A449, Standard Specification for Hex Cap Screws,Bolts and Stu
33、ds, Steel, Heat Treated, 120/105/90 ksiMinimum Tensile Strength, General UseASTM F468, Standard Specification for NonferrousBolts, Hex Cap Screws, Socket Head Cap Screws, andStuds for General UseASTM F593, Standard Specification for Stainless SteelBolts, Hex Cap Screws, and StudsASTM F788/F788M, Sta
34、ndard Specification for SurfaceDiscontinuities of Bolts, Screws, and Studs, Inch andMetric SeriesASTM F1470, Standard Practice for Fastener Samplingfor Specified Mechanical Properties and PerformanceInspectionASTM F1554, Standard Specification for Anchor Bolts,Steel, 36, 55, and 105-ksi Yield Streng
35、thASTM F1941, Standard Specification forElectrodeposited Coatings on Threaded Fasteners(Unified Inch Screw Threads (UN/UNR)ASTM F2329, Standard Specification for Zinc Coating,Hot-Dip, Requirements for Application to Carbon andAlloy Steel Bolts, Screws, Washers, Nuts, and SpecialThreaded FastenersPub
36、lisher: American Society for Testing and Materials(ASTM International), 100 Barr Harbor Drive,P.O. Box C700, West Conshohocken, PA 19428-2959(www.astm.org)SAE J429, Mechanical and Material Requirements forExternally Threaded FastenersPublisher: SAE International, 400 Commonwealth Drive,Warrendale, P
37、A 15096 (www.sae.org)2 GENERAL DATA2.1 LengthThreaded rods are commonly produced in, but notlimited to, 3-ft, 6-ft, 10-ft, and 12-ft lengths. The lengthof the threaded rod shall be measured, overall, from endto end. The length tolerance on all threaded rods innominal lengths of 6 ft and longer shall
38、 be 12in., and14in. for nominal lengths less than 6 ft. See Fig. 1.ASME B18.31.3-2014Fig. 1 Threaded Rod DimensionsLD2.2 ThreadsUnified threads shall conform to the requirements ofASME B1.1. For UNC and UNF threads, Class 1A willbe furnished unless otherwise specified. Class 2A shallbe applicable fo
39、r 8UN threads and at the manufacturersoption for other series, and for sizes where Class 1A isnot applicable. Plated threads shall conform toASME B1.1, Class 3A high limit (basic) and the low limitrequirement of the before-coated or plated thread class.Acme threads shall meet the requirements ofASME
40、 B1.5, Class 2G.Table 1 contains the thread diameter and threads perinch combinations for Unified and Acme thread sizesconsidered standard.2.3 Thread Acceptance GagingUnless otherwise specified by the purchaser, gagingfor screw thread dimensional acceptability shall be inaccordance with Gaging Syste
41、m 21 as specified inASME B1.3.2.4 EndsThe ends shall be of sufficient workmanship to allowfor easy assembly with an appropriate mating nut.2.5 StraightnessWhen required, straightness limits and the inspectiontechnique to be used to evaluate straightness shall beagreed upon between the purchaser and
42、the supplier.2.6 Materials and Mechanical RequirementsThe purchaser must specify the applicable specifica-tion for the threaded rod material. The material shallmeet the chemical and mechanical properties of theapplicable specification. Listed below are some of theprimary material specifications for
43、threaded rod. Othermaterials may be specified by the purchaser.2.6.1 Steel Threaded Rod2.6.1.1 Steel. The designation “steel” means low-carbon steel meeting all of the material and mechanicalrequirements of ASTM A307, Grade A.2.6.1.2 Grade 36. The designation “Grade 36”means steel material meeting a
44、ll of the material and2mechanical requirements of ASTM F1554, Grade 36.NOTE: A designation of “A36” or “ASTM A36” refers to rawmaterial only and is inappropriate as a fastener reference. Thepurchaser shall use the designation “ASTM A307A” or“ASTM F1554, Grade 36” as required.2.6.1.3 B7. The designat
45、ion “B7” means a chro-mium molybdenum steel meeting all of the materialand mechanical requirements of ASTM A193, Grade B7.Other grades of steel for high-temperature applicationsmay be ordered to other grades in ASTM A193/A193M.2.6.1.4 Other Acceptable Steel Materials forThreaded Rod(a) Low strength:
46、 SAE J429, Grades 1 and 2(b) Medium strength: ASTM A449, Type 1;ASTM F1554, Grade 105(c) High strength: ASTM A354, Grades BC and BD;SAE J429, Grade 82.6.2 Stainless Steel Threaded Rod2.6.2.1 Stainless Steel (or SST). The designation“stainless steel” or “SST” means material meeting all ofthe material
47、 and mechanical requirements ofASTM F593, Alloy Group 1, Condition CW.2.6.2.2 316 Stainless Steel (or 316). The designa-tion “316 stainless steel” or “316” means material meet-ing all of the material and mechanical requirements ofASTM F593, Alloy Group 2, Condition CW.2.6.2.3 Other Stainless Steels.
48、 Specific alloys ofstainless steel threaded rod may be ordered by listingthe specific alloy and condition per ASTM F593.2.6.3 Nonferrous Threaded Rod2.6.3.1 Brass. The designation “brass” meansmaterial meeting all of the material and mechanicalrequirements for any brass or naval brass of ASTM F468at
49、 the suppliers option.2.6.3.2 Aluminum. The designation “aluminum”means material meeting all of the material and mechani-cal requirements of any aluminum in ASTM F468 at thesuppliers option.ASME B18.31.3-2014Table 1 Inch Threaded Rod SizesSize and Threads/InchNominalSize Diameter UNC 8UN UNF Acme#4 0.1120 4-40 . . . 4-48 . . .#5 0.1250 5-40 . . . 5-44 . . .#6 0.1380 6-32 . . . 6-40 . . .#8 0.1640 8-32 . . . 8-36 . . .#10 0.1900 10-24 . . . 10-32 . . .#12 0.2160 12-24 . . . 12-28 . . .140.250014-20 . . .14-2814-165160.3125516-18 . . .516-24516-14380.375038-16 . .
