ASTM_B_364_-_96_2009.pdf

Designation:B36496(Reapproved 2009)Standard Specification forTantalum and Tantalum Alloy Ingots1This standard is issued under the fixed designation B364;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers unalloyed and alloyed tanta-lum ingots prepared by vacuum-arc melting,electron-beammelting,or powder-metallurgy consolidation to produce con-solidated metal for processing to various mill shapes.1.2 The materials covered by this specification are:1.2.1 R05200,unalloyed tantalum,electron-beam furnaceor vacuum-arc melt,or both,1.2.2 R05400,unalloyed tantalum,powder-metallurgyconsolidation,1.2.3 R05255,tantalum alloy,90%tantalum 10%tungsten,electron-beam furnace or vacuum-arc melt,or both,1.2.4 R05252,tantalum alloy,97.5%tantalum 2.5%tungsten,electron-beam furnace or vacuum-arc melt,or both,and,1.2.5 R05240tantalumalloy,60%tantalum40%columbium,electron-beam furnace or vacuum-arc melt,orboth.2.Referenced Documents2.1 ASTM Standards:2E29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications3.Ordering Information3.1 Orders for material under this specification shall includethe following information as applicable:3.1.1 Type(see 1.2),3.1.2 Quantity in weight or pieces,3.1.3 Size,diameter,and length,3.1.4 Method of manufacture(Section 4),3.1.5 ASTM designation,and3.1.6 Additions to the specification and supplementary re-quirements if required.4.Materials and Manufacture4.1 The ingot metal for Type R05200(unalloyed tantalum),for Type R05255(90%tantalum 10%tungsten alloy),TypeR05252(97.5%tantalum 2.5%tungsten),and Type R05240(60%tantalum 40%columbium)may be vacuum-arc melted,electron-beam furnace melted,or a combination of these twomethods.The metal for Type R05400 is defined as powder-metallurgy consolidation unalloyed tantalum.5.Chemical Composition5.1 The material shall conform to the requirements forchemical composition in accordance with Table 1.5.1.1 Analysis for elements not listed in Table 1 and notnormally expected in tantalum shall not be required unlessspecified at time of purchase.5.2 In the event of dispute over conformity of the material tothis specification,upon agreement between the purchaser andthe seller as to procedure,representative samples of thematerial may be submitted to a referee for analysis.6.Permissible Variation6.1 QuantityThe permissible overshipment shall be nego-tiated between the purchaser and the manufacturer.7.Workmanship,Finish,and Appearance7.1 The manufacturer shall use care to have each lot of ingotmaterial as uniform in quality as possible.7.2 When specified,the ingots shall be conditioned on thesurface to standards agreed upon between the manufacturer andthe purchaser.7.3 In the conditioned ingot,no abrupt change in diameteror local depressions that will impair subsequent fabrication willbe permitted.The difference between maximum and minimumradius of the conditioned ingot shall not exceed 20%of themaximum radius.7.4 Each ingot shall be tested for soundness by nondestruc-tive test methods,such as dye penetrant and ultrasonic tests.Methods and acceptance standards shall be as mutually agreedupon between the purchaser and the manufacturer.7.5 Defects in the ingots that exceed the acceptance stan-dards shall be removed by cropping or surface conditioning,whichever is appropriate.The manufacturer shall be permitted1This 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 1,2009.Published June 2009.Originallyapproved in 1961.Last previous edition approved in 2002 as B364 96(2002).DOI:10.1520/B0364-96R09.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 to remove surface imperfections provided that after eachremoval the requirements of conditioning are met(see 7.3).7.6 The ingots shall be free of imperfections that would bedeemed injurious by the standards of acceptability agreed uponbetween the purchaser and the manufacturer.8.Significance of Numerical Limits8.1 For the purpose of determining compliance with thespecified limit for requirements of the properties listed in thetables,an observed value or a calculated value shall be roundedas indicated in accordance with the rounding method ofPractice E29.9.Sampling9.1 Care shall be exercised to ensure that the sampleselected for testing is representative of the material and