1、Designation: B655/B655M 10Standard 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 last revision. A num
2、ber 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,niobium-base alloy
3、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. Combiningvalues f
4、rom 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 use. It is the respo
5、nsibility of the userof this standard to establish appropriate safety and healthpractices and determine the applicability of regulatory limita-tions prior to use.2. Referenced Documents2.1 ASTM Standards:2B652/B652M Specification for Niobium-Hafnium Alloy In-gotsE8 Test Methods for Tension Testing o
6、f Metallic MaterialsE21 Test Methods for Elevated Temperature Tension Testsof Metallic MaterialsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE2626 Guide for Spectrometric Analysis of Reactive andRefractory Metals3. Terminology3.1 Definitions:3.1.1
7、 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 finalcontinuous anneal or to a single furnace load for a final batchanneal.3.1
8、.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 width and greaterthan 0.187 in. 4.8 mm in thickness.3.1.3 wire, nmaterial 0.020 t
9、o 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 specification shouldinclude the following information as applicable:4.1.1 Gene
10、ral 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 test temperature and limits (Sections 8and 14),4.1.7 Permissible dimensional to
11、lerances 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), and4.1.12 Packaging (Section 20),1This specification is under the jurisdiction of ASTM Com
12、mittee B10 onReactive and Refractory Metals and Alloys and is the direct responsibility ofSubcommittee B10.03 on Niobium and Tantalum.Current edition approved May 1, 2010. Published June 2010. Originallyapproved in 1979. Last previous edition approved in 2004 as B655/B655M 04.DOI: 10.1520/B0655_B065
13、5M-10.2For 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.1Copyright ASTM International, 100 Barr Harbor Drive, P
14、O Box C700, West Conshohocken, PA 19428-2959, United States.5. Materials and Manufacture5.1 Materials covered by this 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 con
15、ventional extrusion,forging, swaging, rolling, and drawing equipment normallyavailable in metal working plants.6. Chemical Composition6.1 The chemical composition of niobium-hafnium alloyingots and billets for conversion to finished products coveredby this specification shall conform to the requirem
16、ents pre-scribed in Table 1. Analysis for elements, not listed in Table 1and not normally expected in niobium-hafnium 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 specif
17、i-cation.6.3 When specified in the purchase order, the manufacturershall test the product for elements specified in 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 th
18、e annealed condition, defined asat least 90 % recrystallized.7.2 Other temper designations, such as cold-worked temperor 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
19、the requirements for mechanicalproperties as prescribed in Table 3. Unless otherwise specifiedin the purchase, the materials shall conform to the requirementsfor room temperature mechanical properties. In lieu of or inaddition to the room temperature properties, the purchaser mayspecify elevated tem
20、perature mechanical properties in thepurchase order.9. Permissible Variations9.1 Tolerances on RoundsTolerances on niobium-hafnium alloy round products covered by this specificationshall be as prescribed in Table 4.9.2 Tolerances for Square, Rectangular, or Other ShapesTolerances for forged or rolle
21、d square, rectangular, or othershapes shall be as agreed upon between the purchaser andmanufacturer at the time of purchase.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 r
22、oundsshall not exceed 0.050 in. 1.25 mm per foot 300 mm in anylength.9.4 Quantity or WeightFor orders up to 100 ft 30 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 largertha
23、n this quantity shall be negotiated at the time of purchase.10. Quality and Finish10.1 Niobium-hafnium alloy bar and 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,
24、 swaged, drawn; ina cleaned, machined, or ground condition. The manufacturershall be permitted to remove minor surface 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 st
25、andards of accept-ability shall be as agreed upon between the purchaser and themanufacturer at the time of purchase.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 ne
26、wsample or specimen substituted.11.2 In case of a failure, two additional specimens shall beretested. If both retest 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
27、of this specification, the lot may be reworkedat the option of the manufacturer. The lot shall be acceptable ifthe results of all tests, after reworking, conform to thisspecification.12. Significance of Numerical Limits12.1 The following applies to all specified limits in thisstandard for purposes o
28、f determining conformance with thisTABLE 1 Chemical Requirements (Ingot)Niobium-Hafnium Alloy Grade R04295ElementContent, MaximumWeight %, (Except WhereOtherwise Specified)Carbon 0.015Oxygen 0.025Nitrogen 0.010Hydrogen 0.0015Hafnium 911Titanium 0.71.3Zirconium 0.700Tungsten 0.500Tantalum 0.500Niobiu
29、m by differenceTABLE 2 Additional Chemical Requirements for FinishedProduct (When Specified by Purchaser)Niobium-Hafnium Alloy Grade R04295ElementContent, MaximumWeight %Oxygen 0.035Carbon 0.015Nitrogen 0.010Hydrogen 0.0015B655/B655M 102specification. The observed value or a calculated value shall b
30、erounded off to the nearest unit in the last right-hand digit usedin expressing the specification limit, in accordance 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 t
31、o be representative of the finished products.13.2 Care shall be exercised to ensure that the sampleselected for 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 met
32、hods of sampling and analysis shall be asagreed upon between the manufacturer and the purchaser.14. Test Methods14.1 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 tes
33、ts in accordance with Test Methods E8.Determine the yield strength by the 0.2 % offset method. Smallsize 1-in. 25-mm gage length specimens, proportional to thestandard specimen, can be used. Determine tensile propertiesusing a strain rate of 0.003 to 0.007 in./in./min mm/mm/minthrough the yield poin
34、t. After the yield strength has beenexceeded, increase the cross-head speed to approximately 0.05in./in./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 beuse
35、d. Strain rates shall be as agreed upon by purchaser andseller.14.4 Chemical TestsConduct the chemical 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 mater
36、ial covered bythis specification prior to shipment.15.2 If so specified on the purchase order, the purchaser 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
37、witness. The manufacturer shall give ample notice tothe purchaser as to the time and place of the designated 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 th
38、epurchasers inspection at the place of manufacturer to bewaived. When the inspector representing the purchaser 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 sp
39、eci-fication. This inspection shall be conducted so as not tointerfere unnecessarily with production operations.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 an
40、d in writing. In case ofdissatisfaction with the results of the test, the producer orsupplier may make claim for a rehearing.17. Referee17.1 In the event of disagreement between the manufacturerand the purchaser of the conformance of the material to therequirements of this specification, or any spec
41、ial 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 the material to thisspecification.18. Certification18.1 A producers or suppliers certification shall be fur-nished to
42、the purchaser that the material was manufactured,TABLE 3 Mechanical Properties for Material, Annealed ConditionA(90 % Minimum Recrystallized)Ultimate Tensile Strength,min, psi MPaYield Strength (0.2 % off-set), min, psi MPaElongation in 1-in. 25-mm gagelength, min, %Material 0.050 in. 1.27 mm and sm
43、aller indiameter:Room temperature:2000 6 25F 1100 6 15C:56 000 38521 000 14540 000 27516 000 1102020Material 0.051 in. 1.20 mm and larger indiameter:Room temperature:2000 6 25F 1100 6 15C:54 000 37021 000 14538 000 26016 000 1102020ARefer to Section 9 for conditions of mechanical property tests.TABL
44、E 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 0.030.0600.090 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 0.08
45、0.1870.375 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 excl 4050 0.020 0.502.0004.000 excl 50100 0.030 0.8B655/B655M 103sampled, tested, and inspected
46、in accordance with this speci-fication and has been found to meet the requirements. A reportof the test 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 numbe
47、r; 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 theirremoval shall have no deleterious effect upon the material or itsperformance. The chara
48、cters shall be sufficiently stable towithstand ordinary handling.20. Packaging and Package Marking20.1 Unless otherwise specified, material purchased underthis specification must be packed by box or suitable protectivecontainers, and should be so marked as to indicate the nature ofthe best handling.
49、21. Keywords21.1 niobium-hafnium alloy bar; niobium-hafnium alloywireASTM 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 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
