1、Designation: A1014/A1014M 10Standard 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.1. Scope*1.1 This specification covers precipitation hardening bolting(UNS N07718) for high temperature serv
3、ice. See SpecificationA962/A962M for the definition of “bolting.”1.2 The following referenced general requirements are in-dispensable for application of this specification: SpecificationA962/A962M.1.3 Supplementary requirements are provided for use at theoption of the purchaser. The supplementary re
4、quirements 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 st
5、ated 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; therefore, each systemshall be used independently of the other. Combining valuesfrom the two systems
6、 may result in non-conformance with thestandard.2. Referenced Documents2.1 ASTM Standards:2A370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA962/A962M Specification for Common Requirements forBolting Intended for Use at Any Temperature from Cryo-genic to the Creep RangeB637 S
7、pecification for Precipitation-Hardening Nickel Al-loy Bars, Forgings, and Forging Stock for High-Temperature ServiceB880 Specification for General Requirements for ChemicalCheck Analysis Limits for Nickel, Nickel Alloys andCobalt AlloysE112 Test Methods for Determining Average Grain SizeE292 Test M
8、ethods for Conducting Time-for-RuptureNotch Tension Tests of Materials2.2 ASME Standards:3B1.1 Screw Threads2.3 SAE Standards:AS 7467 Bolts And Screws, Nickel Alloy, UNS N07718Tensile Strength 185 KSI 1275 MPa Stress RuptureRated Procurement Specification43. Ordering Information3.1 OrderingIt shall
9、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 SpecificationA962/A962M.4. Common Requirements4.1 Common RequirementsBolting furnished t
10、o thisspecification shall conform to Specification A962/A962M,including any supplementary requirements indicated on thepurchase order. Failure to comply with Specification A962/A962M constitutes non-conformance with this specification. Ifthe requirements of this specification conflict with those ofS
11、pecification A962/A962M, 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 consumable electroderemelting is not performed in vacu
12、um, electrodes produced byvacuum induction melting shall be used.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 Steel Forgings and Wrought Fittings for Piping Applications and B
13、oltingMaterials for Piping and Special Purpose Applications.Current edition approved May 15, 2010. Published June 2010. Originallyapproved in 2000. Last previous edition approved in 2009 as A1014/A1014M09.DOI: 10.1520/A1014_A1014M-10.2For referenced ASTM standards, visit the ASTM website, www.astm.o
14、rg, 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 Engineers (ASME), ASMEInternational Headquarters, Three Park Ave., New York, NY
15、10016-5990, http:/www.asme.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 Conshohock
16、en, PA 19428-2959, United States.5.2 Heat Treatment: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
17、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 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 6
18、20C at 100 F 55 C per 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 Temperatur
19、e VariationPrecipitation 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 r
20、olling in onepass after oxides have been removed from the area to bethreaded.5.5 Dimensions and Tolerances, BoltingFully heat treatedmaterial shall meet the dimensional requirements of Specifi-cation B637 for UNS N07718.6. Chemical Composition6.1 Remelt IngotsThe chemical analyses of each remeltedin
21、got 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 SpecificationB880.7. Mechanical Properties7.1 Tensi
22、le 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 E292. Rupture must occur inthe smooth
23、 section 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 A370 and shallconform to the tensile strength show
24、n 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 ASME B1.1 or calculated as follows:As 5 0.7
25、85 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 showeviden
26、ce of cold working as a result of rolling. The averagegrain size shall be determined in accordance with Test MethodsE112 and 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. 0.35Phosp
27、horus, 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 M
28、echanical 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
29、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 Strength, min, ksi, Mpa 0.2 % offset 125 860Elongation in 2 in., or 50 mm (or 4D) min % 12Reduction of area, min, % 15A1014/A1014M 102struc
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 A962/A962M 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 and
32、 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 tens
33、ile test per lot.10. Workmanship10.1 BoltingShall be uniform in quality and condition,smooth, commercially straight or flat, and free of injuriousimperfections.10.2 FastenersMultiple laps on thread flanks are prohib-ited. Seams, laps, notches, slivers, or oxide scale in the rootarea of threads are p
34、rohibited. 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 A962/A962M, certification shall include the solution treatment cycletime and temperature and
35、the aging cycle time(s) and tempera-ture(s).13. Keywords13.1 bolting; fasteners; Inconel 718; nickel alloy; precipita-tion hardening; temperature service application highSUPPLEMENTARY REQUIREMENTSThese requirements do not apply unless specified in the purchase order and in the OrderingInformation, i
36、n 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 area of the
37、 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 location of
38、selected changes to this specification since the last issue,A1014/A1014M09, that may impact the use of this specification. (Approved May 15, 2010)(1) Revised the title and replaced all instances of “fastenermaterial” with “bolting.”Committee A01 has identified the location of selected changes to thi
39、s specification since the last issue,A1014/A1014M06, 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 Specification A962/A962M. Updated Scope relative
40、 tosupplementary requirements, use of SI units as per GuideA994, and added reference to Specification A962/A962M asindispensable for application of this specification.A1014/A1014M 103ASTM International takes no position respecting the validity of any patent rights asserted in connection with any ite
41、m 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 any time by the responsible technical comm
42、ittee 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 comments will receive careful consideration at a m
43、eeting 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 by ASTM International, 100 Barr Harbor Drive
44、, 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). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).A1014/A1014M 104
