1、This international standard was developed in accordance with internationally recognized princles on standardization established in the Decision on Principles for theDesignation:B989-19NTERNATIONALStandard Specification forHigh Fluidity(HF)Zinc-Aluminum Alloy in Ingot Form forThin Wall Die CastingsTh
2、is standard is issued under the fixed designation B989: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(e)indicates an editor
3、ial change since the last revision or reapproval.1.Scope2.2 ASTM Standards:21.1 This specification covers a commercial zinc-aluminumB897 Specification for Configuration of Zinc and Zinc Alloyalloy in ingot form for remelting for the manufacture of thinJumbo,Block,Half Block,and Slab Ingotwall pressu
4、re die castings as designated and specified in TableB899 Terminology Relating to Non-ferrous Metals and Al-1.loysB908 Practice for the Use of Color Codes for Zinc Casting1.2 Systems of nomenclature used to designate zinc andAlloy Ingotzinc-aluminum(ZA)alloys used for casting are described inB949 Spe
5、cification for General Requirements for Zinc andAppendix X1.Zinc Alloy Products1.3 The values stated in inch-pound units are to be regardedE29 Practice for Using Significant Digits in Test Data toas standard.The values given in parentheses are mathematicalDetermine Conformance with Specificationscon
6、versions to SI units that are provided for information onlyE527 Practice for Numbering Metals and Alloys in theand are not considered standard.Unified Numbering System(UNS)1.4 This standard does not purport to address all of theE536 Test Methods for Chemical Analysis of Zinc and Zincsafety concerns,
7、if any,associated with its use.It is theAlloysresponsibility of the user of this standard to become familiar2.3 ISO Standards:3with all hazards including those identified in the appropriateISO 3815-1 Zinc and zinc alloys-Part 1:Analysis of solidSafety Data Sheet(SDS)for this product/material as prov
8、idedsamples by optical emission spectrometryby the manufacturer,to establish appropriate safety,health,ISO 3815-2 Zinc and zinc alloys-Part 2:Analysis byand environmental practices,and determine the applicabilityinductively coupled plasma optical emission spectrometryof regulatory limitations prior
9、to use.1.5 This international standard was developed in accor-3.Terminologydance with internationally recognized principles on standard-3.1 Terms shall be defined in accordance with Terminologyization established in the Decision on Principles for theB899Development of International Standards,Guides
10、and Recom-3.2 Definitions of Terms Specific to This Standard:mendations issued by the World Trade Organization Technical3.2.1 die casting,n-a casting process in which moltenBarriers to Trade(TBT)Committee.metal is injected under high velocity and pressure into a metaldie and solidified,also a produc
11、t produced by such a process;2.Referenced Documentsalternately known as pressure die casting.2.1 The following documents of the issue in effect on date3.2.2 high fluidity alloy,n-a zinc alloy by nature of itsof order acceptance form a part of this specification to thecomposition is capable of produc
12、ing die castings with thinnerextent referenced herein:wall sections compared to typical die cast alloys;often lessthan 0.012 in.(0.30 mm)in thickness.3.2.3 thin wall die casting,n-a die casting with wallsections that can be less than 0.012 in.(0.30 mm)in thickness.This specification is under the jur
13、isdiction of ASTM Committee B02 on2 For referenced ASTM standards,visit the ASTM website,www.astm.org.orNonferrous Metals and Alloys and is the direct responsibility of Subcommitteecontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMB02.04 on Zinc and Cadmium.Standards volume inf
14、ormation,refer to the standards Document Summary page onCurrent edition approved April 1,2019.Published May 2019.Originallythe ASTM website.approved in 2014.Last previous edition approved in 2014 as B989-14.DOI:3Available from American National Standards Institute(ANSD),25 W.43rd St.10.1520/B0989-19
15、4th Floor,New York,NY 10036,http:/www.ansi.org.*A Summary of Changes section appears at the end of this standardB989-19APPENDIX(Nonmandatory Information)X1.NOMENCLATURE SYSTEMS FOR ZINC AND ZINC-ALUMINUM(ZA)ALLOYSX1.1 The information in this appendix does not constitute aX1.2.1 Common names refer to
16、 the established and com-part of this specification but is provided for informationalmon reference to the zinc casting alloy.purposes only.The nomenclature covers a commercial zinc-aluminum alloy in ingot form for remelting for the manufactureX1.2.2 UNS numbers are established in Practice E527(SAEof
17、 pressure die castings as designated and specified in Table 1.J1086)as part of a Unified Numbering System to provideunique designations for each metal grade and alloy in useX1.2 Several different systems of nomenclature haveworldwide.Zinc alloys start with the prefix Zfollowed byevolved over the yea
18、rs to designate the zinc alloys used forfive numbers.The first digit is based on the major alloyingcasting as listed in Table X1.1.element,the second digit provides a further sub-classificationbased on secondary and tertiary alloying elements,the thirddigit designates the nominal composition of the
19、major alloyingTABLE X1.1 Nomenclature Systems for Zinc-Aluminum Alloyselement,the fourth digit designates the nominal concentrationCommonUNSof the second most important alloying element,and the fifthHF alloyto be assigneddigit allows a unique number to be established to differentiatebetween similar
20、compositions.SUMMARY OF CHANGESCommittee B02 has identified the location of selected changes to this standard since the last issue(B989-14)that may impact the use of this standard.(Approved April 1,2019.)(/Revised references to Specification B949 in subsections 5.1and 7.1.ASTM Intemational takes no
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