1、Designation: B652/B652M 10Standard Specification forNiobium-Hafnium Alloy Ingots1This standard is issued under the fixed designation B652/B652M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, the year of last revision. A number in
2、 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 in-gots prepared by vacuum- or plasma- arc melting or electron-beam furnace melting, or a comb
3、ination of these methods, toproduce consolidated metal for processing to various millshapes.1.2 The material covered by this specification is GradeR04295, niobium-base alloy containing approximately 10 %hafnium and 1 % titanium.1.3 The values stated in either SI units or inch-pound unitsare to be re
4、garded separately as standard. The values stated ineach system may not be exact equivalents; therefore, eachsystem shall be used independently of the other. Combiningvalues from the two systems may result in non-conformancewith the standard.2. Referenced Documents2.1 ASTM Standards:2E29 Practice for
5、 Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE2626 Guide for Spectrometric Analysis of Reactive andRefractory Metals3. Terminology3.1 Lot Definitions:3.1.1 ingot, na quantity of metal cast into a shape suitablefor subsequent processing to various mill products.4.
6、 Ordering Information4.1 Orders for material under this specification shall includethe 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 Chemistry (Section 6),
7、4.1.5 Quality and finish (see 8.2, 8.4, and 8.6),4.1.6 Certifications and Reports (Section 14),4.1.7 Packaging (Section 16), and4.1.8 Disposition of rejected material (Section 12).5. Materials and Manufacture5.1 The ingot metal for this material may be vacuum- orplasma-arc melted, electron-beam melt
8、ed, or a combination ofthese methods.6. Chemical Composition6.1 The material shall conform to the requirements as tochemical composition prescribed in Table 1. Analysis forelements, not listed in Table 1 and not normally expected inniobium hafnium alloy, shall not be required unless specified attime
9、 of purchase. Guide E2626 may be used as a guide forchemical analysis techniques.7. Permissible Variations in Quantity7.1 For orders requiring up to 100 lb 45 kg of ingots, themanufacturer may overship up to a maximum of 20 %. Fororders up to 1000 lb 450 kg, the manufacturer may overshipup to a maxi
10、mum of 10 %. The permissible overshipment shallbe negotiated for orders larger than 1000 lb 450 kg.8. Workmanship, Finish and Appearance8.1 The manufacturer shall use care to have each lot of ingotmaterial as uniform in quality as possible.8.2 When specified, the ingots shall be conditioned on thesu
11、rface to standards agreed upon between the purchaser and themanufacturer.8.3 In the conditioned ingot, no abrupt changes in diameteror local depressions that will impair subsequent fabrication willbe permitted. The difference between maximum and minimumradius of the conditioned ingot shall not excee
12、d 5 % of themaximum radius. Lands, grooves, and local depressions shallbe blended to a maximum angle of 30 to the axis of the ingot.8.4 Each ingot should be tested for soundness by nonde-structive test methods, such as dye penetrant and ultrasonictests, as mutually agreed upon between the purchaser
13、and themanufacturer.1This specification 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 May 1, 2010. Published June 2010. Originallyapproved in 1979. La
14、st previous edition approved in 2004 as B652/B652M 04.DOI: 10.1520/B0652_B0652M-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 pa
15、ge onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.8.5 Defects in ingots that exceed the acceptance standardsshall be removed by cropping or surface conditioning, which-ever is appropriate. The manufacturer shall b
16、e permitted toremove surface imperfections provided that after such removal,the requirements of conditioning are met (8.3).8.6 The ingots shall be free of imperfections that would bedeemed injurious by the standards of acceptability agreed uponbetween the purchaser and the manufacturer.9. Number of
17、Tests9.1 Each ingot shall be tested for chemical composition in atleast three positions along the length of the ingot.10. Significance of Numerical Limits10.1 The following applies to all specified limits in thisstandard for purposes of determining conformance with thisspecification: The observed va
18、lue or a calculated value shall berounded off to the nearest unit in the last right-hand digit usedin expressing the specification limit, in accordance with therounding-off method of Practice E29.11. Sampling11.1 Care shall be exercised to ensure that the sampleselected for testing is representative
19、 of the material, and that itis not contaminated by the sampling procedure. If there is anyquestion relating to the sampling techniques or to the analysisthereof, the methods for sampling and analysis shall be asagreed upon between the purchaser and the manufacturer.12. Rejection12.1 Material that f
20、ails to conform to the requirements ofthis specification may be rejected. Rejection shall be reportedto the producer or supplier promptly and in writing. In case ofdissatisfaction with the results of the tests, the producer orsupplier may make claim for a rehearing.13. Rehearing13.1 In the event of
21、disagreement between the manufacturerand the purchaser on the conformance of the material to therequirements of this specification or any special test specifiedby the purchaser, a mutually acceptable referee shall performthe tests in question. The results of the referees testing shall beused in dete
22、rmining conformance of the material to thisspecification.14. Certification14.1 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 requireme
23、nts. A reportof the test results shall be furnished.15. Product Marking15.1 Each ingot shall be marked for identification by metaldie stamping the manufacturers ingot number on the top of theingot. Each box or skid shall be marked or tagged legibly andconspicuously with the number, type of material,
24、 ingot num-ber(s), manufacturers identification, nominal size, and thegross, net, and tare weights.16. Packaging16.1 Unless otherwise specified, material purchased underthis specification must be boxed or banded on skids in such amanner as to secure safe delivery to their destination whenproperly tr
25、ansported by any common carrier.17. Keywords17.1 niobium-hafnium alloy ingotsASTM 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 validi
26、ty 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 reapproved or withdrawn. Your commen
27、ts 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 you feel that your comments have no
28、t 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 cop
29、ies) 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 ASTM website (www.astm.org/COPYRIGHT/).TABLE 1 Chemical Requirements (Ingot)Niobium-Hafnium Alloy Grade R04295ElementContent, Maximum Weight % (ExceptforHfandTi)Carbon 0.015Oxygen 0.025Nitrogen 0.010Hydrogen 0.0015Hafnium 911Titanium 0.71.3Zirconium 0.700Tungsten 0.500Tantalum 0.500Niobium by differenceB652/B652M 102
