1、Designation: A 1014/A 1014M 09Standard Specification forPrecipitation-Hardening Fasteners and Fastener Material(UNS N07718) for High Temperature Service1This standard is issued under the fixed designation A 1014/A 1014M; the number immediately following the designation indicates theyear of original
2、adoption or, in the case of 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.1. Scope*1.1 This specification covers precipitation hardening fasten-ers and fa
3、stener material (UNS N07718) for high temperatureservice.1.2 The following referenced general requirements are in-dispensable for application of this specification: SpecificationA 962/A 962M.1.3 Supplementary requirements are provided for use at theoption of the purchaser. The supplementary requirem
4、ents 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 contractspecifies the applicable M designation (SI units), the inch-pound units shall apply.1.5 The values stated i
5、n 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; therefore, each systemshall be used independently of the other. Combining valuesfrom the two systems may r
6、esult in non-conformance with thestandard.2. Referenced Documents2.1 ASTM Standards:2A 370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA 962/A 962M Specification for Common Requirementsfor Steel Fasteners or Fastener Materials, or Both, Intendedfor Use at Any Temperature from
7、 Cryogenic to the CreepRangeB 637 Specification for Precipitation-Hardening Nickel Al-loy Bars, Forgings, and Forging Stock for High-Temperature ServiceB 880 Specification for General Requirements for ChemicalCheck Analysis Limits for Nickel, Nickel Alloys andCobalt AlloysE112 Test Methods for Deter
8、mining Average Grain SizeE 292 Test Methods for Conducting Time-for-RuptureNotch Tension Tests of Materials2.2 ANSI Standards:B1.1 Screw Threads32.3 SAE Standards:AS 7467 Bolts And Screws, Nickel Alloy, UNS N07718Tensile Strength 185 KSI 1275 MPa Stress RuptureRated Procurement Specification43. Orde
9、ring 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 SpecificationA 962/A 962M.4. Common Requirements4.1
10、 Common RequirementsProduct furnished to thisspecification shall conform to Specification A 962/A 962M,including any supplementary requirements indicated on thepurchase order. Failure to comply with Specification A 962/A 962M constitutes non-conformance with this specification. Ifthe requirements of
11、 this specification conflict with those ofSpecification A 962/A 962M, then the requirements of thisspecification shall prevail.5. Manufacture5.1 Melting ProcessAlloy shall be multiple melted usingconsumable electrode practice in the remelt cycle or shall beinduction melted under vacuum. If consumabl
12、e electroderemelting is not performed in vacuum, electrodes produced byvacuum induction melting shall be used.5.2 Heat Treatment:1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.22 on S
13、teel Forgings and Wrought Fittings for Piping Applications and BoltingMaterials for Piping and Special Purpose Applications.Current edition approved May 1, 2009. Published May 2009. Originallyapproved in 2000. Last previous edition approved in 2006 as A 1014 06.2For referenced ASTM standards, visit
14、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 National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, N
15、Y 10036, http:/www.ansi.org.4Available from Society of Automotive Engineers (SAE), 400 CommonwealthDr., Warrendale, PA 15096-0001, http:/www.sae.org.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken,
16、 PA 19428-2959, United States.5.2.1 Solution TreatmentMaterial shall be solution heattreated at a temperature within the range of 1725 to 1850 F940 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 fast
17、er.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 Precipitation Heat TreatmentMaterial shall beheated to a temperature of 1325 F 720 C, held at tempera-ture for eight hours minimum, furnace cooled to 1150 F 620C at 100 F 55 C per
18、hour, held at temperature for eighthours, and cooled to room temperature. Alternatively, materialmay be furnace cooled to 1150 F 620 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 VariationPrecipitati
19、on treatmenttemperatures and cooling rates shall be controlled in the rangeof 6 15 F 6 8 C.5.3 StraighteningWhen straightening is necessary it shallbe done after solution treating and prior to aging. Straighteningafter aging is prohibited.5.4 ThreadsThreads shall be formed by rolling in onepass afte
20、r oxides have been removed from the area to bethreaded.5.5 Dimensions and Tolerances, Fastener MaterialFullyheat treated fastener material shall meet the dimensionalrequirements of Specification B 637 for UNS N07718.6. Chemical Composition6.1 Remelt IngotsThe chemical analyses of each remeltedingot
21、shall conform to the requirements for chemical compo-sition prescribed in Table 1.6.2 Product AnalysisIf a product (check) analysis isperformed by the purchaser, the material shall conform to theproduct (check) analysis variations prescribed in SpecificationB 880.7. Mechanical Properties7.1 Tensile
22、and HardnessAll testing shall be performedafter aging. The test specimens shall meet the requirements ofTable 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 E 292. Rupture must occur inthe smooth s
23、ection of each test specimen.7.3 Headed FastenersIn addition to 7.1 and 7.2, headedfasteners with body length three times the diameter or longershall be subjected to full size tensile test in accordance withAnnex A3 of Test Methods and Definitions A 370 and shallconform to the tensile strength shown
24、 in Table 2. The minimumfull size breaking strength (lbf) Kn for individual sizes shallbe as follows:Ts 5 UTS 3 As (1)where:Ts = tensile strength,UTS = tensile strength specified in Table 2, andAs = stress area, square inches square milimetres, asshown in ANSI B1.1 or calculated as follows:As 5 0.78
25、5 D 0.974/n!2(2)where:D = nominal thread size, andn = the number of threads per inch.As 5 0.785 D 0.9382P!2# (3)where:D = Nominal thread size, andP = Thread pitch, mm.8. Metallography8.1 MicrostructureThe microstructure shall be free offreckles, white spots, and Laves phases. Threads may showevidenc
26、e of cold working as a result of rolling. The averagegrain size shall be determined in accordance with Test MethodsE112and found to be ASTM No 5 or finer. Up to 20 % of theTABLE 1 Chemical RequirementsElementUNS N07718(Formerly Grade 718)Carbon, max. 0.08Manganese, max. 0.35Silicon, max. 0.35Phospho
27、rus, 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. 0.006IronBRemainderCopper, max. 0.30NickelC50.055.0AIf determined.BDetermined arithmetically by difference.CNickel + Cobalt.TABLE 2 Mec
28、hanical 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) min % 12Reduction of area, min, % 15Hardness, Brinell 331444Stress Rupture RequirementsTemperature, F C 1200 650Stress, ksi Mpa 100 69
29、0Hours, min 23Elongation in 2 in., or 50 mm (or 4D), min % 5Elevated Tensile RequirementsTemperature, F C 1200 650Tensile strength, min, ksi Mpa 145 1000Yield Strength, min, ksi, Mpa 0.2 % offset 125 860Elongation in 2 in., or 50 mm (or 4D) min % 12Reduction of area, min, % 15A 1014/A 1014M 092struc
30、ture may have a grain size as large as a No. 3 due to thepresence of noncrystallized grains.8.2 MacrostructureFasteners produced from forgingsshall exhibit continuous flow lines in the threads and in anyshank to head or fillet and/or bearing surface areas.9. Number of Tests9.1 ChemistryOne test per
31、remelt ingot.9.2 Mechanical PropertiesThe number of tests shall be inaccordance with Specification A 962/A 962M except that forstress rupture one test shall be run per lot. For headed fastenerswith a body length less than three times the diameter aseparately forged test bar may be used for tensile a
32、nd stressrupture testing provided it is heat-treated with the parts.Separately forged bars shall be approximately the same diam-eter as the headed fastener they represent.9.3 Grain SizeOne test per lot.9.4 Flow LinesOne test per lot on forged fasteners afterfinal machining.9.5 Headed FastenersOne te
33、nsile test per lot.10. Workmanship10.1 Fastener MaterialShall be uniform in quality andcondition, smooth, commercially straight or flat, and free ofinjurious imperfections.10.2 FastenersMultiple laps on thread flanks are prohib-ited. Seams, laps, notches, slivers, or oxide scale in the rootarea of t
34、hreads are prohibited. Cracks are prohibited.11. Product Marking11.1 MarkingFasteners shall be marked with “718” andthe manufacturers identification symbol.12. Certification12.1 ReportIn addition to the requirements of A 962/A 962M, certification shall include the solution treatment cycletime and te
35、mperature and the aging cycle time(s) and tempera-ture(s).13. Keywords13.1 bolts; fasteners; Inconel 718; nickel alloy; precipitationhardening; temperature service application highSUPPLEMENTARY REQUIREMENTSThese requirements do not apply unless specified in the purchase order and in the OrderingInfo
36、rmation, 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. CleaningS2.1 Parts shall be cleaned with nitric acid as stated inAS 7467S3. Fillet RollingS3.1 The fillet a
37、rea of the fastener head shall be rolled.S4. Forged HeadsS4.1 Heads shall be forged.S5. MarkingS5.1 Fastener marking shall include heat lot identification.S5. Thread RollingS5.1 Thread rolling shall be performed before precipitationheat treatment.SUMMARY OF CHANGESCommittee A01 has identified the lo
38、cation of selected changes to this specification since the last issue,A 1014/A 1014M 06, that may impact the use of this specification. (Approved May 1, 2009)(1) Revised title and replaced occurrences of “bolting” with“fastener.” Dropped definition for “bolting material” because itis in Specificatio
39、n A 962/A 962M. Updated Scope relative tosupplementary requirements, use of SI units as per GuideA 994, and added reference to Specification A 962/A 962M asindispensable for application of this specification.A 1014/A 1014M 093ASTM International takes no position respecting the validity of any patent
40、 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 patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at
41、 any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comment
42、s will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted b
43、y ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).A 1014/A 1014M 094
