ASTM_B_989_-_14.pdf

Designation:B98914Standard Specification forHigh Fluidity(HF)Zinc-Aluminum Alloy in Ingot Form forThin Wall Die Castings1This 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()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers a commercial zinc-aluminumalloy in ingot form for remelting for the manufacture of thinwall pressure die castings as designated and specified in Table1.1.2 Systems of nomenclature used to designate zinc andzinc-aluminum(ZA)alloys used for casting are described inAppendix X1.1.3 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to become familiarwith all hazards including those identified in the appropriateMaterial Safety Data Sheet(MSDS)for this product/materialas provided by the manufacturer,to establish appropriatesafety and health practices,and determine the applicability ofregulatory limitations prior to use.2.Referenced Documents2.1 The following documents of the issue in effect on dateof order acceptance form a part of this specification to theextent referenced herein:2.2 ASTM Standards:2B897 Specification for Configuration of Zinc and ZincAlloyJumbo,Block,Half Block,and Slab IngotB899 Terminology Relating to Non-ferrous Metals and Al-loysB908 Practice for the Use of Color Codes for Zinc CastingAlloy IngotB949 Specification for General Requirements for Zinc andZinc Alloy ProductsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE527 Practice for Numbering Metals and Alloys in theUnified Numbering System(UNS)E536 Test Methods for Chemical Analysis of Zinc and ZincAlloys2.3 ISO Standards:3ISO 38151 Zinc and zinc alloys Part 1:Analysis of solidsamples by optical emission spectrometryISO 38152 Zinc and zinc alloys Part 2:Analysis byinductively coupled plasma optical emission spectrometry3.Terminology3.1 Terms shall be defined in accordance with TerminologyB899.3.2 Definitions of Terms Specific to This Standard:3.2.1 die casting,na casting process in which moltenmetal is injected under high velocity and pressure into a metaldie and solidified,also a product produced by such a process;alternately known as pressure die casting.3.2.2 high fluidity alloy,na zinc alloy by nature of itscomposition is capable of producing die castings with thinnerwall sections compared to typical die cast alloys;often lessthan 0.012 in.(0.30 mm)in thickness.3.2.3 thin wall die casting,na die casting with wallsections that can be less than 0.012 in.(0.30 mm)in thickness.4.Ordering Information(See Specification B949)5.Chemical Requirements5.1 The ingots shall conform to the requirements as tochemical composition as prescribed in Table 1.Conformanceshall be determined in accordance with Specification B949,Sections 5.2 and 5.2.1.1This specification is under the jurisdiction of ASTM Committee B02 onNonferrous Metals and Alloys and is the direct responsibility of SubcommitteeB02.04 on Zinc and Cadmium.Current edition approved June 1,2014.Published June 2014.DOI:10.1520/B0989-14.2For 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.3Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 6.Sampling for Determination of Chemical Composition(See Specification B949)7.Methods for Chemical Analysis7.1 The determination of chemical composition shall bemade in accordance with Specification B949,Section 5.2.2.7.2 In case of dispute,the results secured by an approvedmethod(or combination of approved methods),or by a methodagreed upon by both parties,shall be the basis of acceptance.7.2.1 Approved methods include:Test Methods E536,ISO38151,or ISO 38152.7.2.1.1 Test Methods E536 is generally applicable,but mustbe slightly modified to cover the higher Al range.ISO 38151and ISO 38152 are generic methods applied to zinc and zincalloys.Each of the methods may be modified and formatted forthe alloy to be assayed.An experienced chemist,using suitableand/or traceable standards along with valid quality assurancetechniques,will be able to perform and validate the methodsand demonstrate acceptable precision and accuracy.7.3 For purposes of determining com