1、Designation: A1014/A1014M 15Standard 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 boltingmaterial (UNS N07718) and bolting comp
3、onents 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.1.3 Supplementary requirements are provided for use at theoption of the
4、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 contractspecifies the applicable M designation (SI units), the inch-pound unit
5、s 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; therefore, each systemshall be used independently of the other. Combi
6、ning valuesfrom the two systems 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
7、-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 andCobalt AlloysE112 Te
8、st 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 RuptureRated Procurement S
9、pecification3. 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 SpecificationA962/A962M.4. Commo
10、n Requirements4.1 Common RequirementsBolting material and boltingcomponents furnished to this specification shall conform toSpecification A962/A962M, including any supplementary re-quirements indicated on the purchase order. Failure to complywith Specification A962/A962M constitutes non-conformancew
11、ith 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 the1This s
12、pecification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloysand is the direct responsibility of SubcommitteeA01.22 on Steel Forgings and Wrought Fittings for Piping Applications and BoltingMaterials for Piping and Special Purpose Applications.Current editi
13、on approved Nov. 1, 2015. Published November 2015. Originallyapproved in 2000. Last previous edition approved in 2010 as A1014/A1014M10.DOI: 10.1520/A1014_A1014M-15.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Bo
14、ok of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from American Society of Mechanical Engineers (ASME), ASMEInternational Headquarters, Two Park Ave., New York, NY 10016-5990, http:/www.asme.org.4Available from Society of Automotive En
15、gineers (SAE), 400 CommonwealthDr., Warrendale, PA 15096-0001, http:/www.sae.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1remelt cycle or shall be induction melte
16、d 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 1725 to 1850F 940 to 1010 C, held a
17、t 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 Precipitation Heat TreatmentBolting material
18、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 C at any rate providedthe time at 1
19、150 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 necessary it shallbe done after soluti
20、on 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 shall meet the dimensional requirements
21、 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 (check) analysis is per-formed by the
22、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 ofTable 2.7.2 Stress RuptureStress ruptu
23、re 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 components such as bolts, studs, or screwsw
24、ith a body length three times the diameter of the componentor longer shall be subjected to full size tensile test in accor-dance with Annex A3 of Test Methods and Definitions A370and shall conform to the tensile strength shown in Table 2. Theminimum full size breaking strength (lbf) for individual s
25、izesshall be as follows:Ts 5 UTS 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
26、per inch.As 5 0.785D 2 0.9382P!2# (3)where: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, and Laves phases.TABLE 1 Chemical RequirementsElementUNS N07718(Formerly Grade 718)Carbon,
27、 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. 0.006IronBRemainderCopper, max. 0.30NickelC50.055.0AIf determined.BDetermined ar
28、ithmetically 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) min % 12Reduction of area, min, % 15Hardness, Brinell 331444Stress Rupture Requ
29、irementsTemperature, 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 Strength, min, ksi, Mpa 0.2 % offset 125 860Elongation in 2 in., or 50 mm (or 4D) min
30、% 12Reduction of area, min, % 15A1014/A1014M 152Threads 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 a
31、s large as a No. 3 due to the 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 bo
32、lting mate-rial.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 boltingcomponents with a body length less than three times thediameter of the component, a separately forged test b
33、ar may beused for tensile and 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-nent
34、s after final machining.9.5 Headed 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 thr
35、ead flanksare prohibited. Seams, 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
36、the requirements of A962/A962M, 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 serviceapplicat
37、ion 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 product.S1. Protective AtmosphereS1.1 Heat treatment shall be performed under suitableprote
38、ctive atmosphere.S2. CleaningS2.1 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 bol
39、ting components shall include heat lotidentification.S5. Thread RollingS5.1 Thread rolling shall be performed before precipitationheat treatment.A1014/A1014M 153SUMMARY OF CHANGESCommittee A01 has identified the location of selected changes to this specification since the last issue,A1014/A1014M10,
40、that may impact the use of this specification. (Approved November 1, 2015)(1) Removed the word “fasteners” and 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
41、 “material” or “bolting” to be specificas to context whether they are bolting materials or componentsin 1.1, 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 th
42、is 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 committee and must b
43、e 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 meeting of theres
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45、est 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 Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 154
