ASTM_B_392_-_09e1.pdf

Designation:B392091Standard Specification forNiobium and Niobium Alloy Bar,Rod,and Wire1This standard is issued under the fixed designation B392;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.1NOTEEditorial corrections were made throughout in January 2010.1.Scope1.1 This specification covers four grades of wrought nio-bium and niobium alloy bar,rod,and wire as follows:1.1.1 R04200-Type 1Reactor grade unalloyed niobium,1.1.2 R04210-Type2Commercialgradeunalloyedniobium,1.1.3 R04251-Type 3Reactor grade niobium alloy contain-ing 1%zirconium,and1.1.4 R04261-Type 4Commercial grade niobium alloycontaining 1%zirconium.1.2 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.1.3 The following precautionary caveat pertains only to thetest methods portion of this specification.This standard doesnot purport to address all of the safety concerns,if any,associated with its use.It is the responsibility of the user of thisstandard to establish appropriate safety and health practicesand determine the applicability of regulatory limitations priorto use.2.Referenced Documents2.1 ASTM Standards:2B391 Specification for Niobium and Niobium Alloy IngotsE8 Test Methods for Tension Testing of 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 of Terms Specific to This Standard:3.1.1 lot,na lot shall consist of all material produced fromthe same ingot at one time,with the same cross section,processed with the same nominal metallurgical parameters andheat treated at the same conditions.3.1.2 bar,nmaterial less than 6 in.(152.4 mm)in widthand 0.187 in.(4.75 mm)or greater in thickness,with arectangular cross section,supplied in straight lengths.3.1.3 rod,nmaterial 0.125 to 2.50 in.(3.18 to 63.50 mm)in diameter,in round,hexagonal,or octagonal cross sectionsupplied in straight lengths.3.1.4 wire,nmaterial 0.020 to 0.124 in.(0.51 to 3.15 mm)in diameter,furnished in coils or on spools or reels.Materialless than 0.020 in.(0.51 mm)in diameter is not covered by thisspecification.4.Ordering Information4.1 Orders for materials under this specification shall in-clude the following information as applicable:4.1.1 Type and grade(Section 1),4.1.2 ASTM designation and year of issue,4.1.3 Method of manufacture(Section 5),4.1.4 Temper designation(Section 8),4.1.5 Quantity in weight,number of pieces,and dimensions,4.1.6 Chemistry(6.3),4.1.7 Mechanical properties(Section 7),4.1.8 Condition(8.2),4.1.9 Permissible Variations(9.2),4.1.10 Permissible overshipments(9.4),4.1.11 Quality and finish(Section 10),4.1.12 Sampling(Section 11),4.1.13 Inspection(Section 15),4.1.14 Required reports(Section 17),and4.1.15 Additions to the specification and supplementaryrequirements,as required.5.Materials and Manufacture5.1 Material covered by this specification shall be madefrom ingots that conform to Specification B391 and that are1This 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 Oct.1,2009.Published December 2009.Originallyapproved in 1989.Last previous edition approved in 2003 as B392-03.DOI:10.1520/B0392-09E01.2For 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 produced by vacuum or plasma arc melting,vacuum electron-beam melting,or a combination of these three methods.5.2 The various niobium mill products covered by thisspecification are formed with the conventional extrusion,forging,swaging,rolling,and drawing equipment normallyavailable in metal working plants.6.Chemical Requirements6.1 The niobium and niobium alloy ingots and billets forconversion to finished products covered by this specificationshall conform to the requirements for chemical composition asprescribed in Table 1.6.2 The manufacturers ingot analysis shall be consideredthe chemical analysis for products supplied under thisspecification,except for interstitials as specified in 6.3.Alternately,an analysis of a representative sample of in processor final product from the same ingot may be substituted.6.3 When requested by the purchaser at the time ofpurchase,the manufacturer shall furnish a repo