1、Designation: A 1014/A 1014M 06Standard Specification forPrecipitation-Hardening Bolting Material (UNS N07718) forHigh Temperature Service1This standard is issued under the fixed designation A 1014/A 1014M; the number immediately following the designation indicates theyear of original adoption or, in
2、 the case of revision, the year of last revision. A number in parentheses indicates the year of lastreapproval. A superscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification covers a precipitation hardening bolt-ing material (UNS N07718
3、) for high temperature service.1.2 This specification is expressed in both inch-pound andin SI units. However, unless the order specifies the applicable“M” designation (SI units), the material shall be furnished toinch-pound units.1.3 The values stated in either inch-pounds or SI units are tobe rega
4、rded separately as standard. Within the text, the SI unitsare shown in brackets. The values stated in each system are notexact equivalents; therefore, each system must be used inde-pendently of the other. Combining values from the two systemsmay result in nonconformance with the specification.2. Ref
5、erenced 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 Cryogenic to the CreepRangeB 637 Specification
6、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 Determining Average Grain SizeE 292 Test Methods for
7、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. Ordering Information3.1 OrderingIt shall be the resp
8、onsibility 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 Common RequirementsProduct furnished to thisspe
9、cification 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 this specification conflict with those ofSpecif
10、ication 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 consumable electroderemelting is not performed in vacuum,
11、 electrodes produced byvacuum induction melting shall be used.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, an
12、d cooled at arate equivalent to an air cool or faster.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 BoltingMater
13、ials for Piping and Special Purpose Applications.Current edition approved March 1, 2006. Published April 2006. Originallyapproved in 2000. Last previous edition approved in 2003 as A 1014 03.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serv
14、iceastm.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, NY 10036.4Available from Society of Automotive Engineers (SAE), 400 Comm
15、onwealthDr., Warrendale, PA 15096-0001.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.5.2.1.1 Temperature VariationSolution treating tempera-tures shall be controlled
16、 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 hour, held at temperature for eighthours, and cooled to room temperature. Alternati
17、vely, 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 VariationPrecipitation treatmenttemperatures and cooling rates shall be controlled in the rangeof 6 15
18、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 after oxides have been removed from the area to bethreaded.5.5 Dimensions and Tolerance
19、s, Bolting MaterialFullyheat treated bolting material shall meet the dimensional re-quirements of Specification B 637 for UNS N07718.6. Chemical Composition6.1 Remelt IngotsThe chemical analyses of each remeltedingot shall conform to the requirements for chemical compo-sition prescribed in Table 1.6
20、.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 and HardnessAll testing shall be performedafter aging. The test specimens shall mee
21、t 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 section of each test specimen.7.3 Headed FastenersIn addition to 7.1 and 7.2, headed
22、fasteners 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 in Table 2. The minimumfull size breaking strength (lbf) Kn for individual sizes s
23、hallbe 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 0.785 D 0.974/n!2(2)where:D = nominal thread size, andn = the number of threads per inc
24、h.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 showevidence of cold working as a result of rolling. The averagegrain size shall be determined
25、 in accordance with Test MethodsE112and found to be ASTM No 5 or finer. Up to 20 % of thestructure 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 anysha
26、nk to head or fillet and/or bearing surface areas.9. Number of Tests9.1 ChemistryOne test per remelt ingot.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.
27、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 Mechanical PropertiesTensile and HardnessTensile strength, min, ksi
28、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 690Hours, min 23Elongation in 2 in., or 50 mm (or 4D), min % 5Eleva
29、ted 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 0629.2 Mechanical PropertiesThe number of tests shall be inaccordance wit
30、h 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 and stressrupture testing provided it is heat-treated with the parts.Separately forg
31、ed 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 tensile test per lot.10. Workmanship10.1 Bolting MaterialShall be uniform in quality
32、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 threads are prohibited. Cracks are prohibited.11. Product Marking11.1 MarkingFastener
33、s 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 temperature and the aging cycle time(s) and tempera-ture(s).13. Keywords13.1 bolts; fa
34、steners; Inconel 718; nickel alloy; precipitationhardening; temperature service application highSUPPLEMENTARY REQUIREMENTSThese 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 pro
35、duct.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 fastener head shall be rolled.S4. Forged HeadsS4.1 Heads shall be forged.
36、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 selected changes to this specification since the last issue,A 1014 03, tha
37、t may impact the use of this specification. (Approved March 1, 2006)(1) Revised to inch-pound/SI specification.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 advise
38、d 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 committee and must be reviewed every five years andif not revised, either re
39、approved 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 meeting of theresponsible technical committee, which you may attend. If y
40、ou 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, 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 063
