1、Designation:B494/B494M08(Reapproved 2014)Standard Specification forPrimary Zirconium1This standard is issued under the fixed designation B494/B494M;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
2、 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 two grades of zirconium metalcommonly designated as sponge or chunklets,but may alsotake other forms.This specification d
3、oes not include crystal barzirconium.This sponge is used in non-nuclear 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 equ
4、ivalents;therefore eachsystem 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,assoc
5、iated 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:2E29 Practice for Using Significant Digits in Test Data toDetermi
6、ne Conformance with Specifications3.Terminology3.1 Forms:3.1.1 sponge,nzirconium metal produced from the reduc-tion of the chloride,usually by magnesium.3.1.1.1 DiscussionThe process is one where the metalcondenses to the solid state and does not melt.3.1.2 chunklets,nzirconium metal produced from t
7、hereduction of the chloride,usually by sodium.3.1.2.1 DiscussionIn this process,the reduced metal ismelted and dripped onto a rotating disk to form chunklets.3.2 Lota lot shall consist of a single blend produced at onetime.4.Classification4.1 Primary zirconium is furnished in two grades:4.1.1 Grade
8、R60702Unalloyed zirconium.4.1.2 Grade R60703Unalloyed zirconium for metallurgi-cal alloying.5.Ordering Information5.1 Orders for material under this specification shall includethe following information,when applicable:5.1.1 Quantity(weight),5.1.2 Name of material(zirconium sponge or chunklet),5.1.3
9、Grade number(see 4.1),5.1.4 ASTM designation and year of issue,5.1.5 Check analysis(see 7.2),5.1.6 Sampling of small blends(see 8.1.1),5.1.7 Inspection(see 11.1),5.1.8 Product marking(Section 15),5.1.9 Packaging(Section 16),5.1.10 Oxygen limits,when needed(Table 1),and5.1.11 Additions to the specifi
10、cation as required.NOTE1Atypical ordering description is as follows:3000 lb 2000 kgzirconium sponge,ASTM B494/B494M-01,Grade R60703.6.Materials and Manufacture6.1 Zirconium metal is usually prepared by reduction ofzirconium tetrachloride,and it gets its physical characteristicsfrom the processes inv
11、olved in production.These characteris-tics may be expected to vary greatly with manufacturingmethods.This specification,however,is not limited to metalprepared by reduction of tetrachloride or to material of anyspecific physical form.6.2 Only virgin zirconium metal,in identified,uniform,well-mixed b
12、lends,shall be supplied under this specification.7.Chemical Composition7.1 The material shall conform to the requirements as tochemical composition prescribed in Table 1.1This specification is under the jurisdiction of ASTM Committee B10 onReactive and Refractory Metals and Alloys and is the direct
13、responsibility ofSubcommittee B10.02 on Zirconium and Hafnium.Current edition approved May 1,2014.Published May 2014.Originallyapproved in 1969.Last previous edition approved in 2008 as B494/B494M 08.DOI:10.1520/B0494_B0494M-08R14.2For referenced ASTM standards,visit the ASTM website,www.astm.org,or
14、contact 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 7.2 The purchaser may per
15、form a check analysis for anyelements listed in Table 1.The sampling and testing require-ments shall be as agreed upon between the purchaser andsupplier.7.2.1 The manufacturers analysis shall be considered asverified if the check analysis confirms the manufacturersreported values within the toleranc
16、es prescribed in Table 2.Practice E29 shall be used to establish significant digits.8.Sampling8.1 Sampling for Chemical Analysis:8.1.1 The following method shall be used for blends of 3000lb 1362 kg or more.Smaller blends shall be sampled asagreed upon between the manufacturer and the purchaser.8.1.2 The method shall produce a representative sampleamounting to a minimum of 1%of the quantity sampled.Thesample shall be prepared by running the full quantity througha proportioner or splitter so arra
