1、Designation: B655/B655M 10 (Reapproved 2018)Standard Specification forNiobium-Hafnium Alloy Bar and Wire1This standard is issued under the fixed designation B655/B655M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, the year of la
2、st revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers hafnium alloyed niobium barand wire.1.2 The material covered by this specification is R04295,n
3、iobium-base alloy containing approximately 10 % hafniumand 1 % titanium.1.3 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard. The values stated ineach system may not be exact equivalents; therefore, eachsystem shall be used independently of the other.
4、 Combiningvalues from the two systems may result in non-conformancewith the standard.1.4 The following safety hazards caveat pertains only to thetest methods portion, Section 14, of this specification: Thisstandard does not purport to address all of the safety concerns,if any, associated with its us
5、e. It is the responsibility of the userof this standard to establish appropriate safety, health, andenvironmental practices and determine the applicability ofregulatory limitations prior to use.1.5 This international standard was developed in accor-dance with internationally recognized principles on
6、 standard-ization established in the Decision 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:2B652/B652M Specification for Niobium-Haf
7、nium Alloy In-gotsE8/E8M Test Methods for Tension Testing of Metallic Ma-terialsE21 Test Methods for Elevated Temperature Tension Tests ofMetallic MaterialsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE2626 Guide for Spectrometric Analysis of Reac
8、tive andRefractory Metals (Withdrawn 2017)33. Terminology3.1 Definitions:3.1.1 lot, na lot is defined as that material produced fromone ingot and heat treated at the same conditions. Unlessotherwise agreed between manufacturer and purchaser, a lotshall be limited to the product of an 8 h period for
9、finalcontinuous anneal or to a single furnace load for a final batchanneal.3.1.2 bar, na hot rolled, forged, or cold worked semifin-ished solid section product whose cross sectional area is equalto or less than 16 sq in. 10.323 sq mm; rectangular bar mustbe less than or equal to 10 in. 254 mm in wid
10、th and greaterthan 0.187 in. 4.8 mm in thickness.3.1.3 wire, nmaterial 0.020 to 0.1875 in. 0.50 to 4.8 mmin diameter furnished in coils, spools, or on reels. Material lessthan 0.020 in. 0.50 mm in diameter is not covered in thisspecification.4. Ordering Information4.1 Orders for material under this
11、specification shouldinclude the following information as applicable:4.1.1 General alloy description (see 1.2) and ASTM desig-nation and year of issue,4.1.2 Quantity in weight or pieces,4.1.3 Size, diameter, and length,4.1.4 Chemical Composition (Section 6),4.1.5 Temper (Section 7),4.1.6 Mechanical t
12、est temperature and limits (Sections 8and 14),4.1.7 Permissible dimensional tolerances and weight orquantity variations (see 9.2 and 9.4),4.1.8 Quality and finish (see 10.2),4.1.9 Sampling (see 13.2),4.1.10 Inspection witnessing (see 15.2),4.1.11 Certification requirements (Section 18), and1This spe
13、cification is under the jurisdiction of ASTM Committee B10 onReactive and Refractory Metals and Alloys and is the direct responsibility ofSubcommittee B10.03 on Niobium and Tantalum.Current edition approved Oct. 1, 2018. Published October 2018. Originallyapproved in 1979. Last previous edition appro
14、ved in 2010 as B655/B655M 10.DOI: 10.1520/B0655_B0655M-10R18.2For 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.
15、3The last approved version of this historical standard is referenced onwww.astm.org.Copyright 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 s
16、tandardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.14.1.12 Packaging (Section 20),5. Materials and Manufacture5.1 Materials covered by th
17、is specification shall be madefrom ingots in accordance with Specification B652/B652M.5.2 The various niobium-hafnium alloy products covered bythis specification are formed with the conventional extrusion,forging, swaging, rolling, and drawing equipment normallyavailable in metal working plants.6. C
18、hemical Composition6.1 The chemical composition of niobium-hafnium alloyingots and billets for conversion to finished products coveredby this specification shall conform to the requirements pre-scribed in Table 1. Analysis for elements, not listed in Table 1and not normally expected in niobium-hafni
19、um alloy, shall notbe required unless specified at time of purchase.6.2 The manufacturers ingot analysis shall be consideredthe chemical analysis for products supplied under this specifi-cation.6.3 When specified in the purchase order, the manufacturershall test the product for elements specified in
20、 Table 2. Theresults of the tests shall meet the limits shown in Table 2.7. Temper Designations7.1 Unless otherwise stated, the materials supplied underthis specification shall be in the annealed condition, defined asat least 90 % recrystallized.7.2 Other temper designations, such as cold-worked tem
21、peror a stress-relieved temper may be specified in the purchaseorder.8. Mechanical Requirements8.1 Materials in the annealed condition supplied under thisspecification shall conform to the requirements for mechanicalproperties as prescribed in Table 3. Unless otherwise specifiedin the purchase, the
22、materials shall conform to the requirementsfor room temperature mechanical properties. In lieu of or inaddition to the room temperature properties, the purchaser mayspecify elevated temperature mechanical properties in thepurchase order.9. Permissible Variations9.1 Tolerances on RoundsTolerances on
23、niobium-hafniumalloy round products covered by this specification shall be asprescribed in Table 4.9.2 Tolerances for Square, Rectangular, or Other ShapesTolerances for forged or rolled square, rectangular, or othershapes shall be as agreed upon between the purchaser andmanufacturer at the time of p
24、urchase.9.3 Other Tolerances and Limitations:9.3.1 The permissible variation in cut lengths shall notexceed a total of14 in. 6.5 mm.9.3.2 The permissible variation in straightness of roundsshall not exceed 0.050 in. 1.25 mm per foot 300 mm in anylength.9.4 Quantity or WeightFor orders up to 100 ft 3
25、0 m themanufacturer may overship up to 20 %. For orders up to 1000lb 450 kg or 1000 ft 300 m, the manufacturer may overshipup to 10 %. The permissible overshipment for orders largerthan this quantity shall be negotiated at the time of purchase.10. Quality and Finish10.1 Niobium-hafnium alloy bar and
26、 wire shall be free ofinjurious external and internal imperfections of a nature thatwill interfere with the purpose for which it is intended.Material may be finished as forged, rolled, swaged, drawn; ina cleaned, machined, or ground condition. The manufacturershall be permitted to remove minor surfa
27、ce imperfectionsprovided such removal does not reduce the dimensions belowthe minimum permitted by the tolerances in accordance withSection 9.10.2 Test methods for these defects and standards of accept-ability shall be as agreed upon between the purchaser and themanufacturer at the time of purchase.
28、11. Retests11.1 If any sample or specimen exhibits obvious surfacecontamination or improper preparation disqualifying it as atruly representative sample, it shall be discarded and a newsample or specimen substituted.11.2 In case of a failure, two additional specimens shall beretested. If both retest
29、 specimens conform to this specification,the original values shall be discarded and the material ac-cepted.11.3 If the results of the tests are not in conformance withthe requirements of this specification, the lot may be reworkedTABLE 1 Chemical Requirements (Ingot)Niobium-Hafnium Alloy Grade R0429
30、5ElementContent, MaximumWeight %, (Except WhereOtherwise Specified)Carbon 0.015Oxygen 0.025Nitrogen 0.010Hydrogen 0.0015Hafnium 911Titanium 0.71.3Zirconium 0.700Tungsten 0.500Tantalum 0.500Niobium by differenceTABLE 2 Additional Chemical Requirements for FinishedProduct (When Specified by Purchaser)
31、Niobium-Hafnium Alloy Grade R04295ElementContent, MaximumWeight %Oxygen 0.035Carbon 0.015Nitrogen 0.010Hydrogen 0.0015B655/B655M 10 (2018)2at the option of the manufacturer. The lot shall be acceptable ifthe results of all tests, after reworking, conform to thisspecification.12. Significance of Nume
32、rical Limits12.1 The following applies to all specified limits in thisstandard for purposes of determining conformance with thisspecification. The observed value or a calculated value shall berounded off to the nearest unit in the last right-hand digit usedin expressing the specification limit, in a
33、ccordance with therounding-off method of Practice E29.13. Sampling13.1 Samples shall be taken from the material to determineconformity to this specification. The samples shall be taken soas to be representative of the finished products.13.2 Care shall be exercised to ensure that the sampleselected f
34、or testing is representative of the material, and that itis not contaminated by the sampling procedure. If there is anyquestion relating to the sampling techniques or analysisthereof, the methods of sampling and analysis shall be asagreed upon between the manufacturer and the purchaser.14. Test Meth
35、ods14.1 The tensile limits shall apply to samples taken in eitherthe longitudinal or transverse direction of processing.14.2 Room Temperature Tension TestConduct room tem-perature tension tests in accordance with Test Methods E8/E8M. Determine the yield strength by the 0.2 % offset method.Small size
36、 1-in. 25-mm gage length specimens, proportionalto the standard specimen, can be used. Determine tensileproperties using a strain rate of 0.003 to 0.007 in./in./minmm/mm/min through the yield point. After the yield strengthhas been exceeded, increase the cross-head speed to approxi-mately 0.05 in./i
37、n./min mm/mm/min to failure.14.3 Elevated Temperature Tension TestsConduct el-evated temperature tension tests in accordance with Section 8and Test Methods E21. One inch 25 mm gage lengths can beused. Strain rates shall be as agreed upon by purchaser andseller.14.4 Chemical TestsConduct the chemical
38、 analyses by thestandard techniques normally used by the manufacturer. GuideE2626 may be used as a guide for chemical analysis tech-niques.15. Inspection15.1 The manufacturer shall inspect the material covered bythis specification prior to shipment.15.2 If so specified on the purchase order, the pur
39、chaser orhis representative may witness the testing and inspection of thematerial at the place of manufacture. In such cases, thepurchaser shall state in his purchase order which tests hedesires to witness. The manufacturer shall give ample notice tothe purchaser as to the time and place of the desi
40、gnated test. Ifthe purchasers representative does not present himself at theagreed upon time for the testing, and if no new date is agreedupon, the manufacturer shall consider the requirement for thepurchasers inspection at the place of manufacturer to bewaived. When the inspector representing the p
41、urchaser doesappear at the appointed time and place, the manufacturer shallafford him, without charge, all reasonable facilities to see thatthe material is being furnished in accordance with this speci-fication. This inspection shall be conducted so as not tointerfere unnecessarily with production o
42、perations.16. Rejection and Rehearing16.1 Material that fails to conform to the requirements ofthis specification may be rejected. Rejection should be reportedto the producer or supplier promptly and in writing. In case ofdissatisfaction with the results of the test, the producer orsupplier may make
43、 claim for a rehearing.17. Referee17.1 In the event of disagreement between the manufacturerand the purchaser of the conformance of the material to theTABLE 3 Mechanical Properties for Material, Annealed ConditionA(90 % Minimum Recrystallized)Ultimate Tensile Strength,min, psi MPaYield Strength (0.2
44、 % off-set), min, psi MPaElongation in 1-in. 25-mm gagelength, min, %Material 0.050 in. 1.27 mm and smaller indiameter:Room temperature:2000 25F 1100 15C:56 000 38521 000 14540 000 27516 000 1102020Material 0.051 in. 1.20 mm and larger indiameter:Room temperature:2000 25F 1100 15C:54 000 37021 000 1
45、4538 000 26016 000 1102020ARefer to Section 9 for conditions of mechanical property tests.TABLE 4 Permissible Variations in Dimensions for Rolled,Swaged, or Drawn Round Bar and WireDiameter, in. mmTolerances, + or ,in. mm0.0200.030 excl 0.500.75 0.00075 0.020.0300.060 excl 0.751.50 0.001 0.030.0600.
46、090 excl 1.502.3 0.0015 0.040.0900.125 excl 2.33.2 0.002 0.050.1250.187 excl 3.24.8 0.003 0.080.1870.375 excl 4.89.5 0.004 0.100.3750.500 excl 9.512.7 0.005 0.130.5000.625 excl 12.717 0.007 0.180.6250.750 excl 1719 0.008 0.200.7501.000 excl 1925 0.010 0.251.0001.500 excl 2540 0.015 0.381.5002.000 ex
47、cl 4050 0.020 0.502.0004.000 excl 50100 0.030 0.8B655/B655M 10 (2018)3requirements of this specification, or any special tests specifiedby the purchaser, a mutually acceptable referee shall performthe tests in question. The results of the referees testing shall beused in determining conformance of t
48、he material to thisspecification.18. Certification18.1 A producers or suppliers certification shall be fur-nished to the purchaser that the material was manufactured,sampled, tested, and inspected in accordance with this speci-fication and has been found to meet the requirements. A reportof the test
49、 results shall be furnished.19. Product Marking19.1 Each bar, bundle, box, coil, or spool shall be marked ortagged legibly and conspicuously with the number of thisspecification; temper; heat number; manufacturers identifica-tion; nominal size; and the gross, net, and tare weights. Ifmarking fluids are used, they shall be of such a nature as to beremoved easily with cleaning solutions. The markings or theirre
