1、Designation:B77612Standard 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 revision.A number i
2、n 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 nuclear applications
3、,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 eachsystem must be
4、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 is the responsib
5、ility 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:2E8 Test Methods for Tension Testing of Metallic MaterialsE21 Test Methods for Elevated Temperature Ten
6、sion 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 finish produced from the same ingot bythe same reduction
7、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 anneal.3.2 Forms:3.2.1 strip,na flat product,may be supplied in
8、 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 0.125 in.(3.2 mm)in thickness.4.Classification4.1 The stri
9、p,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 information as applicable:5.1.1 Quantity(weight or number of pi
10、eces),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 listed(7.1.3),5.1.7 Product analysis(7.1.1.1 and 7.1.3),5.1.8 T
11、ensile 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),5.1.13 Purchaser inspection(16.1),5.1.14 Rejection an
12、d 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).1This specification is under the jurisdiction of ASTM Committee B10 onReactive and Refractory Metals and Alloys and is the direct responsibility ofSubcommitt
13、ee B10.02 on Zirconium and Hafnium.Current edition approved Nov.1,2012.Published December 2012.Originallyapproved in 1987.Last previous edition approved in 2007 as B776 07.DOI:10.1520/B0776-12.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at servi
14、ceastm.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 NOTE1A typical ordering description is as follows:twenty-eightp
15、ieces hafnium plate,annealed;mechanically descaled and pickled;0.158by 6.000 in.thick by 18-in.long lengths;Grade R1;ASTM B776 07.6.Materials and Manufacture6.1 Material covered by this specification shall be madefrom ingots that are produced by vacuum or plasma arcmelting,vacuum electron-beam melti
16、ng,a combination ofthese three methods or other melting processes conventionallyused for reactive metals.All processes to be done in furnacesusually used for reactive metals.6.2 The various mill products covered by this specificationshall be formed with the conventional extrusion,forging,orrolling equipment normally found in primary ferrous andnonferrous plants.6.3 The sheet,strip,and plate shall be supplied in therecrystallized annealed condition unless otherwise specified inthe purchase order.
