ASTM_B_365_-_12.pdf

Designation:B36512Standard Specification forTantalum and Tantalum Alloy Rod and Wire1This standard is issued under the fixed designation B365;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 rod and wire.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,and1.2.5 R05240 tantalum alloy,60%tantalum,40%niobium,electron-beam furnace or vacuum-arc melt,or both.1.3 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.4 The following precautionary caveat pertains only to thetest methods portion,Section 13,of this specification:Thisstandard does not purport to address all of the safety problems,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:2E8 Test Methods for Tension Testing of Metallic MaterialsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 lot,nall material produced from the same ingot or asingle powder blend at one time,with the same cross sectionand with the same nominal metallurgical parameters.3.1.2 rod,nmaterial 0.125 to 2.5 in.(3.18 to 63.50 mm)indiameter in round,hexagonal,or octagonal cross sectionsupplied in straight lengths.3.1.3 wire,nmaterial 0.010 to 0.124 in.(0.254 to 3.15mm)in diameter furnished in coils or on spools or reels.Material less than 0.010 in.in diameter is not covered by thisspecification.4.Ordering Information4.1 Orders for material under this specification shall includethe following information as applicable:4.1.1 Quantity(weight or number of pieces),4.1.2 Name of material(tantalum rod or wire),4.1.3 Type(see 1.2),4.1.4 Method of manufacture(Section 5),4.1.5 ASTM designation,4.1.6 Finish and appearance(Section 9),and4.1.7 Additions to the specification and supplementary re-quirements if required.5.Materials and Manufacture5.1 Material covered by this specification shall be madefrom vacuum-arc melted or electron-beam melted ingots orpowder-metallurgy consolidated unalloyed tantalum.5.2 The various tantalum mill products covered by thisspecification are formed with the conventional extrusion,forming,swaging,rolling,and drawing equipment normallyavailable in metal working plants.6.Chemical Composition6.1 The tantalum and tantalum alloy ingots and the tantalumpowder-metallurgy consolidated ingots for conversion to fin-ished products covered by this specification shall conform tothe requirements for chemical composition as prescribed inTable 1.6.1.1 Analysis for elements not listed in Table 1 and notnormally expected in tantalum shall not be required unlessspecified at time of purchase.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 Dec.1,2012.Published January 2013.Originallyapproved in 1961.Last previous edition approved in 2004 as B365 98(2004).DOI:10.1520/B0365-12.2For 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 6.2 The manufacturers ingot analysis shall be consideredthe chemical analysis for products supplied under this specifi-cation.6.3 When requested by the purchaser at the time ofpurchase,the seller shall furnish a report certifying the valuesof carbon,oxygen,nitrogen,and hydrogen as specified in Table2 for each lot of material supplied.The performance of thisspecial provision will be negotiated.7.Mechanical Properties7.1 Materials supplied under this specification shall con-form to the requirements for mechanical properties as specifiedin Table 3.7.2 The performance of mechanical tests to this requirementwill be negotiated at time of purchase.8.Dimensions,Mass,and Permissible Variations8.1 Tolerances o