1、Designation: B 655/B 655M 04Standard Specification forNiobium-Hafnium Alloy Bar, Rod, and Wire1This standard is issued under the fixed designation B 655/B 655M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, the year of last revis
2、ion. A number in parentheses indicates the year of last reapproval.A superscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers hafnium alloyed niobium bar,rod, and wire.1.2 The material covered by this specification is R04295,ni
3、obium-base alloy containing approximately 10 % hafniumand 1 % titanium.1.3 The values stated in either inch-pound units or SI unitsare to be regarded separately as standard. Within the text, theSI units are shown in brackets. The values stated in eachsystem are not exact equivalents; therefore, each
4、 system shallbe used independently of the other. Combining values from thetwo systems may result in nonconformance with the specifi-cation.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
5、 of the safety concerns,if any, associated with its use. It is the responsibility 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:2B 652/B 652M Specificat
6、ion for Niobium-Hafnium AlloyIngotsE 8 Test Methods for Tension Testing of Metallic MaterialsE 21 Test Methods for Elevated Temperature Tension Testsof Metallic MaterialsE 29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications3. Terminology3.1 Definitions:3
7、.1.1 bar, nmaterial less than 6 in. 150 mm in width and0.187 in. 4.8 mm or greater in thickness, with a rectangular orsquare cross section, supplied in straight lengths.3.1.2 lot, na lot is defined as that material produced fromone ingot and heat treated at the same conditions.3.1.3 rod, nmaterial 0
8、.125 to 212 in. 3.2 to 64 mm indiameter in round, hexagonal, or octagonal cross sectionsupplied in straight lengths.3.1.4 wire, nmaterial 0.020 to 0.124 in. 0.50 to 3.2 mmin diameter furnished in coils, spools, or on reels. Material lessthan 0.020 in. 0.50 mm in diameter is not covered in thisspecif
9、ication.4. Ordering Information4.1 Orders for material under this 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 C
10、omposition (Section 6),4.1.5 Temper (Section 7),4.1.6 Mechanical test 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
11、15.2),4.1.11 Certification requirements (Section 18), and4.1.12 Packaging (Section 20),5. Materials and Manufacture5.1 Materials covered by this specification shall be madefrom ingots in accordance with Specification B 652/B 652M.5.2 The various niobium-hafnium alloy products covered bythis specific
12、ation are formed with the conventional extrusion,forging, swaging, rolling, and drawing equipment normallyavailable in metal working plants.1This specification is under the jurisdiction of ASTM Committee B10 onReactive and Refractory Metals and Alloys and is the direct responsibility ofSubcommittee
13、B10.03 on Niobium and Tantalum.Current edition approved May 1, 2004. Published May 2004. Originallyapproved in 1979. Last previous edition approved in 1996 as B 655/B 655M 96 (1999).2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.o
14、rg. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6. Chemical Composition6.1 The chemical composition of niobium-h
15、afnium 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-hafnium alloy, shall notbe required unless specified at time of p
16、urchase.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 Table 2. Theresults of the tests shall meet the limits show
17、n 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 temperor a stress-relieved temper can be specified as agreed up
18、onbetween purchaser and the manufacturer at the time of pur-chase.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 mat
19、erials 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 nio
20、bium-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 rolled square, rectangular, or othershapes shall be as agreed upon between the purchaser andmanufacturer at the time of pur
21、chase.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 30
22、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, rod,
23、 and wire shall be freeof injurious 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 s
24、urface 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 purch
25、ase.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 re
26、test 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 reworkedat the option of the manufacturer. The lot shall be acceptable ift
27、he 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 of determining conformance with thisspecification. The observed value or a calculated value shall berounded off t
28、o the nearest unit in the last right-hand digit usedin expressing the specification limit, in accordance with therounding-off method of Practice E 29.13. Sampling13.1 Samples shall be taken from the material to determineconformity to this specification. The samples shall be taken soas to be represen
29、tative of the finished products.TABLE 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 0.500Niobium b
30、y differenceTABLE 2 Additional Chemical Requirements for FinishedProduct (When Specified by Purchaser)Niobium-Hafnium Alloy Grade R04295ElementContent, MaximumWeight %Oxygen 0.035Carbon 0.015Nitrogen 0.010Hydrogen 0.0015B 655/B 655M 04213.2 Care shall be exercised to ensure that the sampleselected f
31、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
32、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 E 8.Determine the yield strength by the 0.2 % offset method. Smallsize 1-i
33、n. 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/mmminthrough the yield point. After the yield strength has beenexceeded, increase the cross-head speed to approximately 0.05in./in.min mm
34、/mmmin to failure.14.3 Elevated Temperature Tension TestsConduct el-evated temperature tension tests in accordance with Section 8and Test Methods E 21. One inch 25 mm gage lengths can beused. Strain rates shall be as agreed upon by purchaser andseller.14.4 Chemical TestsConduct the chemical analyses
35、 by thestandard techniques normally used by the manufacturer.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 purchaser orhis representative may witness the testing and inspection of themater
36、ial 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 designated test. Ifthe purchasers representative does not present himself at theag
37、reed 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 purchaser doesappear at the appointed time and place, the manufacturer shallaff
38、ord 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 operations.16. Rejection and Rehearing16.1 Material that fails to conform to th
39、e 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 claim for a rehearing.17. Referee17.1 In the event of disagreement between th
40、e manufacturerand the purchaser of the conformance of the material to therequirements 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 o
41、f the material to thisspecification.18. Certification18.1 When specified in the purchase order or contract, aproducers or suppliers certification shall be furnished to thepurchaser that the material was manufactured, sampled, tested,and inspected in accordance with this specification and hasbeen fou
42、nd to meet the requirements. When specified in thepurchase order or contract, a report of the test results shall befurnished.19. Product Marking19.1 Each bar, rod, bundle, box, coil, or spool shall bemarked or tagged legibly and conspicuously with the numberof this specification; temper; heat number
43、; manufacturersTABLE 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 smaller indiameter:Room temperature:
44、20006 25F 1100 6 15C:56 000 38521 000 14540 000 27516 000 1102020Material 0.051 in. 1.20 mm and larger indiameter:Room temperature:20006 25F 1100 6 15C:54 000 37021 000 14538 000 26016 000 1102020ARefer to Section 9 for conditions of mechanical property tests.TABLE 4 Permissible Variations in Dimens
45、ions for Rolled,Swaged, or Drawn Round Bar, Rod, 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 0.080.1870.375 excl 4.89.5 0.004 0
46、.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 0.502.0002.500 excl 5063 0.030 0.8B 655/B 655M 043identification; nominal size; and the gross, net, and tarewe
47、ights. If marking fluids are used, they shall be of such anature as to be removed easily with cleaning solutions. Themarkings or their removal shall have no deleterious effect uponthe material or its performance. The characters shall besufficiently stable to withstand ordinary handling.20. Packaging
48、 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.21. Keywords21.1 niobium-hafnium alloy bar; niobium-hafnium alloyrod; niobium-
49、hafnium alloy wireASTM 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 subject to revision at any time by the respon
