1、Designation: B997 16Standard 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. 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 c
3、oatings 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-alum
4、inum 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 mathematicalconver
5、sions 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 % A
7、luminum-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
8、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 ZincAlloysE1277 Test Method for Analysis of Zinc-5 % Aluminum-Mischmetal Alloys by ICP Emission Spectro
9、metry2.3 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 allo
10、y.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 unde
11、r this specification shall includethe relevant information as listed 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 t
12、ime 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 is the d
13、irect responsibility of SubcommitteeB02.04 on Zinc and Cadmium.Current 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, orconta
14、ct 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.*A Summary
15、of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States16. Sampling for Determination of Chemical Composition6.1 See appropriate requirements in Specification B949.7. Methods for Chemical
16、Analysis7.1 The determination of chemical composition shall bemade in accordance with Specification 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 m
17、ethods include: Test Methods E536,E1277, ISO 3815-1, or ISO 3815-2.NOTE 2Test 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 ass
18、ayed. An experienced chemist, usingsuitable and/or traceable standards along with valid quality assurancetechniques, 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 Th
19、e material covered by this specification shall be freefrom dross, slag, or other harmful contamination.9. Physical Properties9.1 See appropriate requirements in Specification B949.10. Mechanical Properties10.1 See appropriate requirements in Specification B949.11. Dimensions, Mass, and Permissible V
20、ariation, andShapes and Sizes11.1 See appropriate requirements in Specification B949.12. Workmanship, Finish, and Appearance12.1 See appropriate requirements in Specification B949.13. Inspection13.1 See appropriate requirements in Specification B949.14. Rejection and Rehearing14.1 Material that fail
21、s to conform to the requirements ofthis specification 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
22、 material does not conform to the require-ments of this 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 B949.16.
23、 Product and Package Marking, Packaging andPreparation for Delivery16.1 See appropriate requirements in Specification B949.17. 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,
24、E,F,GElementComposition, %Type 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 0.00
25、2 0.002 0.002Others,Ieach, max 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 i
26、n expressing the specified limit, 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-
27、dip coatings may contain antimony 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
28、up to 0.75 % maximum.EFor Type 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 registeredtrad
29、emark of the GALFAN Technology 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 causeint
30、ergranular corrosion in zinc-aluminum 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 162SUMMARY OF CHANGESCommittee B02 has identified the
31、 location of selected changes to this standard since the last issue (B99715)that may impact the use of this standard. (Approved May 1, 2016.)(1) References to section numbers in Specification B949 wereeliminated.ASTM International takes no position respecting the validity of any patent rights assert
32、ed 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 time by t
33、he 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 receive
34、 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 Interna
35、tional, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 163
