1、Designation:B77612(Reapproved 2019)Standard Specification forHafnium and Hafnium Alloy Strip,Sheet,and Plate1This standard is issued under the fixed designation B776;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last re
2、vision.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 two grades of wrought haf-nium and hafnium alloy strip,sheet,and plate as follows:1.1.1 Grade R1 for nuc
3、lear applications,and1.1.2 Grade R3 for commercial applications.1.2 Unless a single unit is used,for example corrosion massgain in mg/dm2,the values stated in either inch-pound or SIunits are to be regarded separately as standard.The valuesstated in each system are not exact equivalents;therefore,ea
4、chsystem must be used independently of the other.SI valuescannot be mixed with inch-pound values.1.3 The following precautionary caveat pertains only to thetest method portions of this specification.This standard doesnot purport to address all of the safety concerns,if any,associated with its use.It
5、 is the responsibility of the user of thisstandard to establish appropriate safety,health,and environ-mental practices and determine the applicability of regulatorylimitations prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on stan
6、dard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2E8/E8M Test Methods for Tension Testing of Metall
7、ic Ma-terialsE21 Test Methods for Elevated Temperature Tension Tests ofMetallic MaterialsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications3.Terminology3.1 Lot Definition:3.1.1 lot,na lot shall consist of a material of the same size,shape,condition,and
8、 finish produced from the same ingot bythe same reduction schedule and the same heat treatmentparameters.Unless otherwise agreed upon between manufac-turer and purchaser,a lot shall be limited to the product of an8-h period for final continuous anneal,or to a single furnaceload for final batch annea
9、l.3.2 Forms:3.2.1 strip,na flat product,may be supplied in coil,lessthan 6 in.(150 mm)in width and from 0.005 to 0.188 in.(0.13to 4.8 mm)in thickness.3.2.2 sheet,na flat product 6 in.(150 mm)or more inwidth and from 0.005 to 0.188 in.(0.13 to 4.8 mm)inthickness.3.2.3 plate,na flat product more than
10、0.125 in.(3.2 mm)in thickness.4.Classification4.1 The strip,sheet,or plate is to be furnished in two gradesas follows:4.1.1 Grade R1(Nuclear)Unalloyed.4.1.2 Grade R3(Commercial)Unalloyed.5.Ordering Information5.1 Purchase orders for materials under this specificationshall include the following infor
11、mation as applicable:5.1.1 Quantity(weight or number of pieces),5.1.2 Form(3.2)and dimensions,5.1.3 Grade(4.1),5.1.4 Lot definition for continuous anneal,if applicable(3.1),5.1.5 Metallurgical condition,if not in the recrystallizedannealed condition(6.3),5.1.6 Chemical analysis of elements not liste
12、d(7.1.3),5.1.7 Product analysis(7.1.1.1 and 7.1.3),5.1.8 Tensile test temperatures(8.1),5.1.9 Mechanical properties,for Grade R3(8.1),5.1.10 Corrosion properties and testing,(9.1 and 9.1.3),5.1.11 Material condition and finish(12.1 12.5),5.1.12 Workmanship standards and methods of inspection(Section
13、 13),1This specification is under the jurisdiction of ASTM Committee B10 onReactive and Refractory Metals and Alloys and is the direct responsibility ofSubcommittee B10.02 on Zirconium and Hafnium.Current edition approved April 1,2019.Published May 2019.Originallyapproved in 1987.Last previous editi
14、on approved in 2012 as B776 12.DOI:10.1520/B0776-12R19.2For 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 A
15、STM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standar
16、ds,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 5.1.13 Purchaser inspection(16.1),5.1.14 Rejection and referee(17.2),5.1.15 Certification report(Section 18),5.1.16 Product marking(Section 19),and5.1.17 Packaging and package marking(Section 20).NOTE1A typical ordering description is as follows:28 pieceshafnium plate,annealed;mechanically descaled and pickled;0.158 by6.000 in.thick by 18-in.long lengths;Grade R1;ASTM B776 07.6.Materi
