ASTM B750-2008 Standard Specification for GALFAN (Zinc-5 % Aluminum-Mischmetal) Alloy in Ingot Form for Hot-Dip Coatings.pdf

1、Designation: B 750 08Standard Specification forGALFAN1(Zinc-5 % Aluminum-Mischmetal) Alloy in IngotForm for Hot-Dip Coatings2This standard is issued under the fixed designation B 750; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision,

2、 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. Scope*1.1 This specification covers GALFAN, zinc-5 %aluminum-mischmetal (Zn-5Al-MM) alloy (UNS Z38510)3iningot for

3、m for remelting for use in the production of hot-dipcoatings on steel. Alloy composition is specified in Table 1.1.2 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand

4、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 become familiarwith all hazards including those identified in the appropriateMaterial Safety Data Sheet (MSDS)

5、 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 ASTM Standards:4B 899 Terminology Relating to Non-ferrous Metals andAlloysE29 Practice for

6、Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE47 Test Methods for Chemical Analysis of Zinc Die-Casting Alloys5E88 Practice for Sampling Nonferrous Metals and Alloysin Cast Form for Determination of Chemical CompositionE 527 Practice for Numbering Metals and Alloy

7、s in theUnified Numbering System (UNS)E 1277 Test Method for Chemical Analysis of Zinc-5 %Aluminum-MischmetalAlloys by ICP Emission Spectrom-etry2.2 Other Standard:6GF-1 Standard Practice for Determination of Cerium andLanthanum Compositions in GALFAN Alloy (5 %-0.04 % La-0.04 % Ce-Bal SHG Zn)1GALFA

8、N is a registered trademark of the GALFAN Information Center, Inc.2This 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 Nov. 1, 2008. Published December 20

9、08. Originallyapproved in 1985. Last previous edition approved in 2007 as B 750 07.3UNS number in conformance with Practice E 527.4For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume informat

10、ion, refer to the standards Document Summary page onthe ASTM website.5Withdrawn.6Available from International Lead Zinc Research Organization, 2525 MeridianParkway, P.O. Box 12036, Research Triangle Park, NC 27709 2036, http:/www.ilzro.org.TABLE 1 GALFAN, Zn-5Al-MM Alloy Ingot ChemicalRequirementsA,

11、B,C,D,EElementUNS Z38510Composition,%AluminumF4.26.2Cerium + lanthanum, total 0.030.10Iron, max 0.075Silicon, max 0.015LeadG, max 0.005CadmiumG, max 0.005TinG, max 0.002OthersH, each, max 0.02OthersH, total, max 0.04Zinc RemainderAFor purposes of acceptance and rejection, the observed value or calcu

12、latedvalue obtained from analysis should be rounded to the nearest unit in the lastright-hand place of figures, used in expressing the specified limit, in accordancewith the rounding procedure prescribed in Section 3 of Practice E29.BBy agreement between purchaser and supplier, analysis may be requi

13、red andlimits established for elements or compounds not specified in the table of chemicalcomposition.CGALFAN, Zn-5Al-MM alloy ingot for hot-dip coatings may contain antimony,copper, and magnesium in amounts of up to 0.002, 0.1, and 0.05 %, respectively.No harmful effects have ever been noted due to

14、 the presence of these elementsup to these concentrations and, therefore, analyses are not required for theseelements.DMagnesium may be specified by the buyer up to 0.1 % maximum.EZirconium and titanium may each be specified by the buyer up to 0.02 %maximum.FAluminum may be specified by the buyer up

15、 to 12 % maximum.GLead and cadmium, and to a lesser extent tin and antimony, are known tocause intergranular corrosion in zinc-aluminum alloys. For this reason it isimportant to maintain the levels of these elements below the limits specified.HExcept antimony, copper, magnesium, zirconium, and titan

16、ium.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.2.3 ISO Standards:7ISO 3815-1 Zinc and zinc alloys Part 1:Analysis of solidsamples by optical emission spectrometry

17、ISO 3815-2 Zinc and zinc alloys Part 2: Analysis byinductively coupled plasma optical emission spectrometry3. Terminology3.1 Terms shall be defined in accordance with TerminologyB 899.3.2 Definitions of Terms Specific to This Standard:3.2.1 mischmetal, na naturally occurring mixture of rare-earth el

18、ements in metallic form, primarily cerium and lantha-num.3.3 Abbreviations:3.3.1 MMmischmetal.3.3.2 Zn-5Al-MMzinc-5 % aluminum mischmetal.4. Ordering Information4.1 Orders for ingot under this specification shall includethe following information:4.1.1 Quantity in pounds,4.1.2 Alloy (Table 1),4.1.3 S

19、ize, if not manufacturers standard,4.1.4 Specification number and year of issue,4.1.5 Inspection (Section 9), and4.1.6 Product marking (Section 12).5. Materials and Manufacture5.1 The alloys may be made by any approved process.5.2 The material covered by this specification shall be freefrom dross, s

20、lag, or other harmful contamination.6. Chemical Composition6.1 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 c

21、hemical composition of the metal during thecourse of manufacture, he shall not be required to sample andanalyze the finished product.7. Sampling7.1 If the alloy is in the form of standard ingots at thecustomers plant, the sample for chemical analysis shall betaken in accordance with 7.1.1 to 7.1.5,

22、inclusive.7.1.1 Selection of PortionA portion representative of thetotal shipment or order shall be selected at random for the finalsample. The portion preferably shall be taken during loading orunloading. At least one ingot shall be taken from every 10 000lb (4530 kg), or fraction thereof, of each

23、lot of alloy in theshipment. From smaller lots, five ingots shall be taken.7.1.2 Preparation of SampleEach ingot shall be cleanedthoroughly to rid the surface of extraneous material and drilledor sawed, without lubricant in accordance with 7.1.3 or 7.1.4.The drillings or sawings shall be subjected t

24、o the action of astrong magnet to remove any adventitious iron with which thesample may have become contaminated from the drill or saw.7.1.3 DrillingTwo holes shall be drilled, preferably fromthe bottom or brand side of each ingot, at two points locatedalong one diagonal of the ingot so that each po

25、int is halfwaybetween the center and one extremity of the diagonal. If twoholes from each ingot do not yield the weight of sampleprescribed in 7.1.5, a third hole shall be drilled at the center ofeach ingot. Each hole shall be bored completely through theingot, care being taken to avoid starting the

26、 drill in a depressionand to adjust the feed to give drillings 0.010 to 0.020 in. (0.25to 0.51 mm) in thickness. The drill used preferably shall be onetwisted from flat stock. The diameter of the drill shall be516 in.(7.9 mm). The drillings shall be broken or cut with clean shearsinto pieces not ove

27、r12 in. in length and mixed thoroughly.7.1.4 SawingUsing, preferably, a heat treated high-speedsteel saw, make two cuts completely across the ingot from onelong side to the other. Each cut shall be approximately half waybetween the center and each end. The width of the saw cut shallbe sufficient to

28、give the weight of sample prescribed in 7.1.5,and cuttings from all the ingots shall be mixed thoroughly toform a uniform sample.7.1.5 Size of Sample and StorageThe prepared sampleshall weigh at least 300 g. The properly mixed sample shall besplit into three equal parts, each of which shall be place

29、d in asealed package, one for the manufacturer, one for the pur-chaser, and one for a referee, if necessary. Tight, leakproof,paper sample envelopes or cardboard cartons may be used tohold the sample.7.2 If the alloy is in shapes other than standard ingots, thesampling procedure shall be agreed upon

30、 between the manu-facturer or seller and the purchaser.7.3 An optimal method of sampling for analysis may be bymelting together representative portions of each ingot selected,and then sampling the liquid composite by casting suitablespecimens for either spectrographic or chemical analysis.7.4 Sample

31、s for Spectrochemical and Other Methods ofAnalysisSamples for spectrochemical and other methods ofanalysis shall be suitable for the form of material beinganalyzed and the type of analytical method used.7.5 Aspects of sampling and sample preparation not coveredspecifically in this specification shal

32、l be carried out in accor-dance with Practice E88.8. Analytical Methods8.1 Method of AnalysisThe determination of chemicalcomposition shall be made in accordance with suitable chemi-cal (Test Method E47for tin), ICP argon plasma spectrometric(Test Method E 1277) or other methods (including spectro-c

33、hemical methods ISO 3815-1 or ISO 3815-2. In case ofdispute, the results secured by Test Method E 1277 shall be thebasis of acceptance.8.2 A standard practice for X-ray fluorescence spectrometryfor determination of cerium and lanthanum in a zinc-5 %aluminum alloy has been established by the Internat

34、ional LeadZinc Research Organization (Standard Practice GF-1). In caseof dispute, the results secured by Test Method E 1277 shall bethe basis of acceptance.7Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.B7500829. Inspect

35、ion9.1 If the purchaser desires that his representative inspect orwitness the inspection and testing of the product prior toshipment, such agreement shall be made by the purchaser andproducer or supplier as part of the contract or purchaser order.9.2 When such inspection or witness of inspection and

36、testing is agreed upon, the producer or supplier shall afford thepurchasers representative all reasonable facilities to satisfyhim that the product meets the requirements of this specifica-tion. Inspection and tests shall be conducted so there is nounnecessary interference with the producers operati

37、ons.10. Rejection and Rehearing10.1 Material that fails 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

38、 for a rehearing. If the rehearingestablishes that the 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.11. Certification11.1 When specified in the purchase order or contract, thema

39、nufacturers or suppliers certification shall be furnished tothe purchaser stating that samples representing each lot havebeen manufactured, tested, and inspected in accordance withthis specification and the requirements have been met. Whenspecified in the purchase order or contract, a report of the

40、testresults shall be furnished.12. Product Marking12.1 All ingots shall be properly marked for identificationwith the producers name or brand.12.2 Each bundle or skid shall be identified with theproducers heat, lot, or other identification mark.13. Packaging and Package Marking13.1 Unless otherwise

41、specified, the ingot shall be packagedto provide adequate protection during normal handling andtransportation. Each package shall contain only one alloyunless otherwise agreed upon.14. Keywords14.1 GALFAN; hot dip coating alloy; zinc alloy; zinc-5 %aluminum mischmetal alloySUMMARY OF CHANGESCommitte

42、e B02 has identified the location of selected changes to this standard since the last issue (B 750 - 07)that may impact the use of this standard. (Approved November 1, 2008.)(1) Revisions have been made to Sections 2.3 and 8.1 to addanalytical spectrochemical methods ISO 3815-1 andISO 3815-2.Committ

43、ee B02 has identified the location of selected changes to this standard since the last issue (B 750 - 03)that may impact the use of this standard. (Approved May 1, 2007.)(1) Footnote F in Table 1 was revised to increase maximumaluminum to 12 %.ASTM International takes no position respecting the vali

44、dity of any patent rights 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 subj

45、ect to revision at any time 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 Headquar

46、ters. Your comments will 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 standar

47、d is copyrighted by ASTM International, 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).B750083