ASTM_B_655_-_B_655M_-_10.pdf

Designation:B655/B655M10Standard Specification forNiobium-Hafnium Alloy Bar and Wire1This standard is issued under the fixed designation B655/B655M;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 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 barand wire.1.2 The material covered by this specification is R04295,niobium-base alloy containing approximately 10%hafniumand 1%titanium.1.3 The values stated in either SI units or inch-pound unitsare to be regarded 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.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 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:2B652/B652M Specification for Niobium-Hafnium Alloy In-gotsE8 Test Methods for Tension Testing of Metallic MaterialsE21 Test Methods for Elevated Temperature Tension Tests ofMetallic MaterialsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE2626 Guide for Spectrometric Analysis of Reactive andRefractory Metals3.Terminology3.1 Definitions:3.1.1 lot,na lot is defined as that material produced fromone ingot and heat treated at the same conditions.Unlessotherwise agreed between manufacturer and purchaser,a lotshall be limited to the product of an 8 h period for finalcontinuous anneal or to a single furnace load for a final batchanneal.3.1.2 bar,na hot rolled,forged,or cold worked semifin-ished solid section product whose cross sectional area is equalto or less than 16 sq in.10.323 sq mm;rectangular bar mustbe less than or equal to 10 in.254 mm in width and greaterthan 0.187 in.4.8 mm in thickness.3.1.3 wire,nmaterial 0.020 to 0.1875 in.0.50 to 4.8 mmin diameter furnished in coils,spools,or on reels.Material lessthan 0.020 in.0.50 mm in diameter is not covered in thisspecification.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 Composition(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 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 B652/B652M.5.2 The various niobium-hafnium alloy products covered bythis specification 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 Alloysand is the direct responsibility ofSubcommittee B10.03 on Niobium and Tantalum.Current edition approved May 1,2010.Published June 2010.Originallyapproved in 1979.Last previous edition approved in 2004 as B655/B655M 04.DOI:10.1520/B0655_B0655M-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 page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 6.Chemical Composition6.1 The chemical composition of niobium-hafnium 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 purchase.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 shown in Table 2.7.Temper Designations7.1 Unless otherwise stated,the materials supplied underthis specificati