1、Designation:B99716Standard Specification forZinc-Aluminum Alloys in Ingot Form for Hot-Dip Coatings1This standard is issued under the fixed designation B997;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A
2、number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This specification covers certain zinc-aluminum(Zn-Al)alloys in ingot form for re-melting for use in the production ofhot-dip coatings on
3、steel.Alloy compositions are specifiedbelow and in Table 1.ASTMCommonUNSType 595/5 Zn/Alto be assignedType 1090/10 Zn/Alto be assignedType 1585/15 Zn/Alto be assignedNOTE1The zinc-aluminum alloys in Specification B997 are intendedto be used primarily to create a molten zinc-aluminum bath and differ
4、fromthe master alloys in Specification B860 which are intended primarily toadjust the concentration of certain elements in molten zinc galvanizingbaths.1.2 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that
5、 are provided for information onlyand are not considered standard.1.3 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 establish appro-priate safety and health practices and determine the applic
6、a-bility of regulatory 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:2B750 Specification for GALFAN(Zinc-5%Aluminum-Mischmetal)Alloy in I
7、ngot Form for Hot-Dip CoatingsB860 Specification for Zinc Master Alloys for Use in HotDip GalvanizingB899 Terminology Relating to Non-ferrous Metals and Al-loysB949 Specification for General Requirements for Zinc andZinc Alloy ProductsE29 Practice for Using Significant Digits in Test Data toDetermin
8、e Conformance with SpecificationsE527 Practice for Numbering Metals and Alloys in theUnified Numbering System(UNS)E536 Test Methods for Chemical Analysis of Zinc and ZincAlloysE1277 Test Method for Analysis of Zinc-5%Aluminum-Mischmetal Alloys by ICP Emission Spectrometry2.3 ISO Standards:3ISO 3815-
9、1 Zinc and zinc alloys Part 1:Analysis of solidsamples by optical emission spectrometryISO 3815-2 Zinc and zinc alloys Part 2:Analysis byinductively coupled plasma optical emission spectrometry3.Terminology3.1 Terminology:3.1.1 Type 5,n95%zinc 5%aluminum alloy.3.1.2 Type 10,n90%zinc 10%aluminum allo
10、y.3.1.3 Type 15,n85%zinc 15%aluminum alloy.3.2 Abbreviations:3.2.1 95/5 Zn/Al95%zinc 5%aluminum alloy.3.2.2 90/10 Zn/Al90%zinc 10%aluminum alloy.3.2.3 85/15 Zn/Al85%zinc 15%aluminum alloy.4.Ordering Information4.1 Orders for ingots under this specification shall includethe relevant information as li
11、sted in Specification B949.5.Chemical Requirements5.1 LimitsThe alloys shall conform to the requirements asto chemical composition prescribed in Table 1.Conformanceshall be determined by the producer by analyzing samplestaken at the time ingots are made.If the producer hasdetermined the chemical com
12、position of the metal during thecourse of manufacture,he shall not be required to sample andanalyze the finished product.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.Curre
13、nt edition approved May 1,2016.Published July 2016.Originally approvedin 2015.Last previous edition approved in 2015 as B997 15.DOI:10.1520/B0997-16.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards
14、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.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,10
15、0 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 6.Sampling for Determination of Chemical Composition6.1 See appropriate requirements in Specification B949.7.Methods for Chemical Analysis7.1 The determination of chemical composition shall bemade in accordance with Speci
16、fication B949.7.2 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,E1277,ISO 3815-1,or ISO 3815-2.NOTE2Test Method E1277 is directly applicable up to 8%Al,in anunmodified form.ISO 3815-1 and ISO 3815-2 are generic methodsapplied to zinc and zinc alloys.Each of the methods may be modified andformatted for the alloy to be assayed
