1、Designation: B997 15Standard 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 revisi
2、on. 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 certain zinc-aluminum (Zn-Al)alloys in ingot form for re-melting for use in the production ofhot-dip co
3、atings on steel. Alloy compositions are specifiedbelow and in Table 1.ASTM Common UNSType 5 95/5 Zn/Al to be assignedType 10 90/10 Zn/Al to be assignedType 15 85/15 Zn/Al to be assignedNOTE 1The zinc-aluminum alloys in Specification B997 are intendedto be used primarily to create a molten zinc-alumi
4、num bath and differ 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 mathematicalconvers
5、ions to SI units that 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
6、and determine the applica-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 % Al
7、uminum-Mischmetal) Alloy in Ingot 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 D
8、igits 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 ZincAlloysE1277 Test Method for Analysis of Zinc-5 % Aluminum-Mischmetal Alloys by ICP Emission Spectrom
9、etry2.3 ISO Standards:3ISO 3815-1 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
10、.3.1.2 Type 10, n90 % zinc 10 % aluminum alloy.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
11、 this specification shall includethe relevant information as listed in Specification B949,Section 4.5. 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
12、 at the time ingots are made. If the producer hasdetermined the chemical composition 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
13、 is the direct responsibility of SubcommitteeB02.04 on Zinc and Cadmium.Current edition approved June 1, 2015. Published July 2015. DOI: 10.1520/B0997-15.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMS
14、tandards 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 Conshohoc
15、ken, PA 19428-2959. United States16. Sampling for Determination of Chemical Composition6.1 See appropriate requirements in Specification B949,inSection 6.7. Methods for Chemical Analysis7.1 The determination of chemical composition shall bemade in accordance with Specification B949, Section 5.2.2.7.
16、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.NOTE 2Test Method E1277 is directly appl
17、icable 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. An experienced chemist, usingsuitable and/or traceable standards along with valid quality assurancete
18、chniques, will be able to perform and validate the methods anddemonstrate acceptable precision and accuracy.8. Materials and Manufacture8.1 The alloys may be made by any approved process.8.2 The material covered by this specification shall be freefrom dross, slag, or other harmful contamination.9. P
19、hysical Properties9.1 See appropriate requirements in Specification B949,Section 9.10. Mechanical Properties10.1 See appropriate requirements in Specification B949,Section 10.11. Dimensions, Mass, and Permissible Variation, andShapes and Sizes11.1 See appropriate requirements in Specification B949,S
20、ection 11.12. Workmanship, Finish, and Appearance12.1 See appropriate requirements in Specification B949,Section 12.13. Inspection13.1 See appropriate requirements in Specification B949,Section 13.14. Rejection and Rehearing14.1 Material that fails to conform to the requirements ofthis specification
21、 may be rejected. Rejection should be reportedto the producer or supplier promptly and in writing. In case ofdissatisfaction with the results of the test, the producer orsupplier may make claim for a rehearing. If the rehearingestablishes that the material does not conform to the require-ments of th
22、is specification, as much of the rejected originalmaterial as possible shall be returned to the producer orsupplier.14.2 For additional information see Specification B949.15. Certification15.1 See appropriate requirements in Specification B949,Section 15.16. Product and Package Marking, Packaging an
23、dPreparation for Delivery16.1 See appropriate requirements in Specification B949,Section 16.17. Keywords17.1 GALFAN; hot-dip coating alloy; zinc-5 % aluminumalloy; zinc-10 % aluminum alloy; zinc-15 % aluminum alloyTABLE 1 Zn-Al Alloy Ingot Chemical RequirementsA,B,C,D,E,F,GElementComposition, %Type
24、5F95/5 Zn/AlUNS (to beassigned)Type 10E90/10 ZN/AlUNS (to beassigned)Type 15E85/15 Zn/AlUNS (to beassigned)Aluminum 4.2-6.2 9.5-10.5 14.1-15.9Iron, max 0.075 0.075 0.075Silicon, max 0.015 0.015 0.015Lead,Hmax 0.005 0.005 0.005Cadmium,Hmax 0.005 0.005 0.005Tin,Hmax 0.002 0.002 0.002Others,Ieach, max
25、0.02 0.02 0.02Others,Itotal, max 0.04 0.04 0.04Zinc Remainder Remainder RemainderAFor purposes of acceptance and rejection, the observed value or calculatedvalue obtained from analysis should be rounded to the nearest unit in the lastright-hand place of figures, used in expressing the specified limi
26、t, in accordancewith the rounding procedure in Section 3 of Practice E29.BBy agreement between purchaser and supplier, analysis may be required andlimits established for elements or compounds not specified in the table of chemicalcomposition.CZn-Al alloy ingot for hot-dip coatings may contain antimo
27、ny and copper inamounts of up to 0.002 and 0.1 %, respectively. No harmful effects have ever beennoted due to the presence of these elements up to these concentrations and,therefore, analyses are not required for these elements.DMagnesium may be specified by the buyer up to 0.75 % maximum.EFor Type
28、10 and Type 15, the mischmetal (cerium + lanthanum) may be specifiedby the buyer up to 0.10 % maximum.FFor Type 5, if the mischmetal (cerium + lanthanum) is specified by the buyer, boththe buyer and producer shall indicate Specification B750 (GALFAN is a registeredtrademark of the GALFAN Technology
29、Centre, Inc.) as the referenced standardand the composition shall meet all the requirements of that standard.GZirconium and titanium may each be specified by the buyer up to 0.02 %maximum.HLead and cadmium, and to a lesser extent tin and antimony, are known to causeintergranular corrosion in zinc-al
30、uminum alloys. For this reason it is important tomaintain the levels of these elements below the limits specified.IExcept antimony, copper, magnesium, zirconium, titanium, and the mischmetal(cerium + lanthanum).B997 152ASTM International takes no position respecting the validity of any patent rights
31、 asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any ti
32、me by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will
33、receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM
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