1、Designation: A1014/A1014M 161Standard Specification forPrecipitation-Hardening Bolting (UNS N07718) for HighTemperature Service1This standard is issued under the fixed designation A1014/A1014M; the number immediately following the designation indicates theyear of original adoption or, in the case of
2、 revision, the year of last revision. A number in parentheses indicates the year of lastreapproval. A superscript epsilon () indicates an editorial change since the last revision or reapproval.1NOTEEditorially corrected Supplementary Requirements in January 2018.1. Scope*1.1 This specification cover
3、s precipitation hardening boltingmaterial (UNS N07718) and bolting components for hightemperature service. See Specification A962/A962M for thedefinition of “bolting.”1.2 The following referenced general requirements are in-dispensable for application of this specification: SpecificationA962/A962M.1
4、.3 Supplementary requirements are provided for use at theoption of the purchaser. The supplementary requirements onlyapply when specified individually in the purchase order orcontract.1.4 This specification is expressed in both inch-pound andin SI units. However, unless the purchase order or contrac
5、tspecifies the applicable M designation (SI units), the inch-pound units shall apply.1.5 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard. Within the text, theSI units are shown in brackets. The values stated in eachsystem may not be exact equivalents
6、; therefore, each systemshall be used independently of the other. Combining valuesfrom the two systems may result in non-conformance with thestandard.1.6 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decisio
7、n on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2A962/A962M Specification for Common Requirements forBolting Intended for Use at Any
8、Temperature from Cryo-genic to the Creep RangeB637 Specification for Precipitation-Hardening and ColdWorked Nickel Alloy Bars, Forgings, and Forging Stockfor Moderate or High Temperature ServiceB880 Specification for General Requirements for ChemicalCheck Analysis Limits for Nickel, Nickel Alloys an
9、dCobalt AlloysE112 Test Methods for Determining Average Grain SizeE292 Test Methods for Conducting Time-for-Rupture NotchTension Tests of Materials2.2 ASME Standards:3B1.1 Screw Threads2.3 SAE Standards:4AS 7467 Bolts And Screws, Nickel Alloy, UNS N07718Tensile Strength 185 KSI 1275 MPa Stress Ruptu
10、reRated Procurement Specification3. Ordering Information3.1 OrderingIt shall be the responsibility of the purchaserto specify all requirements that are necessary for product underthis specification including any supplementary ones and thoseincluded in the ordering information required by Specificati
11、onA962/A962M.4. Common Requirements4.1 Common RequirementsBolting material and boltingcomponents furnished to this specification shall conform to1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloysand is the direct responsibility of Subcommi
12、tteeA01.22 on Steel Forgings and Wrought Fittings for Piping Applications and BoltingMaterials for Piping and Special Purpose Applications.Current edition approved May 1, 2016. Published May 2016. Originallyapproved in 2000. Last previous edition approved in 2015 as A1014/A1014M 15.DOI: 10.1520/A101
13、4_A1014M-16E01.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from American Society of Mechanical
14、 Engineers (ASME), ASMEInternational Headquarters, Two Park Ave., New York, NY 10016-5990, http:/www.asme.org.4Available from Society of Automotive Engineers (SAE), 400 CommonwealthDr., Warrendale, PA 15096-0001, http:/www.sae.org.*A Summary of Changes section appears at the end of this standardCopy
15、right ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of Internati
16、onal Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1Specification A962/A962M, including any supplementary re-quirements indicated on the purchase order. Failure to complywith Specification A962/A962M constitutes non-conforman
17、cewith this specification. If the requirements of this specificationconflict with those of Specification A962/A962M, then therequirements of this specification shall prevail.5. Manufacture5.1 Melting ProcessBolting material alloy shall bemultiple-melted using consumable electrode practice in thereme
18、lt cycle or shall be induction melted under vacuum. Ifconsumable electrode re-melting is not performed in vacuum,electrodes produced by vacuum induction melting shall beused.5.2 Heat Treatment:5.2.1 Solution TreatmentBolting material shall be solutionheat treated at a temperature within the range of
19、 1725 to 1850F 940 to 1010 C, held at the selected temperature for a timecommensurate with cross-sectional thickness, and cooled at arate equivalent to an air cool or faster.5.2.1.1 Temperature VariationSolution treating tempera-tures shall be controlled in the range of 6 25 F 6 14 C.5.2.2 Precipita
20、tion Heat TreatmentBolting material shallbe heated to 1325 F 720 C, held at temperature for eighthours minimum, furnace cooled to 1150 F 620 C at 100 F55 C per hour, held at temperature for eight hours, andcooled to room temperature. Alternatively, bolting materialmay be furnace cooled to 1150 F 620
21、 C at any rate providedthe time at 1150 F 620 C is adjusted so the total precipi-tation heat treatment time is 18 hours minimum.5.2.2.1 Temperature VariationPrecipitation treatmenttemperatures and cooling rates shall be controlled in the rangeof 6 15 F 6 8 C.5.3 StraighteningWhen straightening is ne
22、cessary it shallbe done after solution treating and prior to aging. Straighteningafter aging is prohibited.5.4 ThreadsThreads shall be formed by rolling in one passafter oxides have been removed from the area to be threaded.5.5 Dimensions and Tolerances, BoltingFully heat treatedbolting material sha
23、ll meet the dimensional requirements ofSpecification B637 for UNS N07718.6. Chemical Composition6.1 Remelt IngotsThe chemical analyses of each remeltedingot used for bolting material shall conform to the require-ments for chemical composition prescribed in Table 1.6.2 Product AnalysisIf a product (c
24、heck) analysis is per-formed by the purchaser, the bolting material shall conform tothe product (check) analysis variations prescribed in Specifi-cation B880.7. Mechanical Properties7.1 Tensile and HardnessAll testing shall be performedafter aging. The test specimens shall meet the requirements ofTa
25、ble 2.7.2 Stress RuptureStress rupture testing shall be con-ducted in accordance with Table 2 using a combination test barin accordance with Test Methods E292. Rupture must occur inthe smooth section of each test specimen.7.3 Headed Bolting ComponentsIn addition to 7.1 and7.2, headed bolting compone
26、nts such as bolts, studs, or screwswith a body length three times the diameter of the componentor longer shall be subjected to full size tensile test and shallconform to the tensile strength shown in Table 2. The minimumfull size breaking strength (lbf) for individual sizes shall be asfollows:Ts 5 U
27、TS 3As (1)where:Ts = tensile strength,UTS = tensile strength specified in Table 2, andAs = stress area, square inches square millimetres, asshown in ASME B1.1 or calculated as follows:As 5 0.785D 2 0.974/n!2(2)where:D = nominal thread size, andn = the number of threads per inch.As 5 0.785D 2 0.9382P
28、!2# (3)TABLE 1 Chemical RequirementsElementUNS N07718(Formerly Grade 718)Carbon, max. 0.08Manganese, max. 0.35Silicon, max. 0.35Phosphorus, max. 0.015Sulfur, max. 0.015Chromium 17.021.0Cobalt, max.A1.0Molybdenum 2.803.30Columbium + 4.755.50Tantalum . . .Titanium 0.651.15Aluminum 0.200.80Boron, max.
29、0.006IronBRemainderCopper, max. 0.30NickelC50.055.0AIf determined.BDetermined arithmetically by difference.CNickel + Cobalt.TABLE 2 Mechanical PropertiesTensile and HardnessTensile strength, min, ksi Mpa 185 1275Yield Strength, min, ksi, Mpa 0.2 % offset 150 1035Elongation in 2 in., or 50 mm (or 4D)
30、 min % 12Reduction of area, min, % 15Hardness, Brinell 331444Stress Rupture RequirementsTemperature, F C 1200 650Stress, ksi Mpa 100 690Hours, min 23Elongation in 2 in., or 50 mm (or 4D), min % 5Elevated Tensile RequirementsTemperature, F C 1200 650Tensile strength, min, ksi Mpa 145 1000Yield Streng
31、th, min, ksi, Mpa 0.2 % offset 125 860Elongation in 2 in., or 50 mm (or 4D) min % 12Reduction of area, min, % 15A1014/A1014M 1612where:D = Nominal thread size, andP = Thread pitch, mm.8. Metallography8.1 MicrostructureThe microstructure of the bolting ma-terial shall be free of freckles, white spots
32、, and Laves phases.Threads of bolting components may show evidence of coldworking as a result of rolling. The average grain size shall bedetermined in accordance with Test Methods E112 and foundto be ASTM No. 5 or finer. Up to 20 % of the structure mayhave a grain size as large as a No. 3 due to the
33、 presence ofnon-crystallized grains.8.2 MacrostructureBolting components produced fromforgings shall exhibit continuous flow lines in the threads andin any shank to head or fillet and/or bearing surface areas.9. Number of Tests9.1 ChemistryOne test per remelt ingot of bolting mate-rial.9.2 Mechanica
34、l PropertiesThe number of tests shall be inaccordance with Specification A962/A962M except that forstress rupture one test shall be run per lot. For headed boltingcomponents with a body length less than three times thediameter of the component, a separately forged test bar may beused for tensile and
35、 stress rupture testing provided it isheat-treated with the components. Separately forged bars shallbe approximately the same diameter as the headed boltingcomponent they represent.9.3 Grain SizeOne test per lot.9.4 Flow LinesOne test per lot on forged bolting compo-nents after final machining.9.5 H
36、eaded Bolting ComponentsOne tensile test per lot.10. Bolting Quality, Condition, and Finish10.1 Bolting MaterialShall be uniform in quality andcondition, smooth, commercially straight or flat, and free ofinjurious imperfections.10.2 Bolting ComponentsMultiple laps on thread flanksare prohibited. Sea
37、ms, laps, notches, slivers, or oxide scale inthe root area of threads are prohibited. Cracks are prohibited.11. Product Marking11.1 MarkingBolting components shall be marked with“718” and the manufacturers identification symbol.12. Certification12.1 ReportIn addition to the requirements of A962/A962
38、M, certification shall include the solution treatment cycletime and temperature and the aging cycle time(s) and tempera-ture(s).13. Keywords13.1 bolting; bolting materials; bolting components; Inconel718; nickel alloy; precipitation hardening; temperature serviceapplication highSUPPLEMENTARY REQUIRE
39、MENTSThese requirements do not apply unless specified in the purchase order and in the OrderingInformation, in which event the specified tests shall be made before shipment of the product.S1. Protective AtmosphereS1.1 Heat treatment shall be performed under suitableprotective atmosphere.S2. Cleaning
40、S2.1 Bolting components shall be cleaned with nitric acid asstated in AS 7467S3. Fillet RollingS3.1 The fillet area of the head of bolts, screws, or studsshall be rolled.S4. Forged HeadsS4.1 Heads for bolts, screws, or studs shall be forged.S5. MarkingS5.1 Marking on bolting components shall include
41、 heat lotidentification.S6. Thread RollingS6.1 Thread rolling shall be performed before precipitationheat treatment.A1014/A1014M 1613SUMMARY OF CHANGESCommittee A01 has identified the location of selected changes to this specification since the last issue,A1014/A1014M15, that may impact the use of t
42、his specification. (Approved May 1, 2016)(1) Removed reference to A370.Committee A01 has identified the location of selected changes to this specification since the last issue,A1014/A1014M10, that may impact the use of this specification. (Approved November 1, 2015)(1) Removed the word “fasteners” a
43、nd replaced it with “boltingcomponents” in accordance with the definition of bolting inSpecification A962/A962M in 7.3, 8.2, 9.2, 9.4, 9.5, 10.2, 11.1,13, S3.1, and S5.1.(2) Expanded the words “material” or “bolting” to be specificas to context whether they are bolting materials or componentsin 1.1,
44、 4.1, 5.1, 5.2.1, 5.2.2, 5.5, 6.1, 6.2, 8.1, 9.1, and 10.1.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such pat
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