1、Designation: B750 12Standard Specification forGALFAN1(Zinc-5 % Aluminum-Mischmetal) Alloy in IngotForm for Hot-Dip Coatings2This standard is issued under the fixed designation B750; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, t
2、he 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 form
3、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 ar
4、e 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) f
5、or 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:4B899 Terminology Relating to Non-ferrous Metals andAlloysB949 Specification f
6、or General Requirements for Zinc andZinc Alloy ProductsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE88 Practice for Sampling Nonferrous Metals and Alloys inCast Form for Determination of Chemical CompositionE527 Practice for Numbering Metals and
7、Alloys in theUnified Numbering System (UNS)E1277 Test Method for Chemical Analysis of Zinc-5 %Aluminum-MischmetalAlloys by ICP Emission Spectrom-etry2.2 Other Standard:5GF-1 Standard Practice for Determination of Cerium andLanthanum Compositions in GALFAN Alloy (5 %-0.04 % La-0.04 % Ce-Bal SHG Zn)2.
8、3 ISO Standards:61GALFAN 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 May 1, 2012.
9、 Published May 2012. Originallyapproved in 1985. Last previous edition approved in 2009 as B750 09. DOI:10.1520/B0750-12.3UNS number in conformance with Practice E527.4For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual
10、Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.5Available from International Lead Zinc Research Organization, 2525 MeridianParkway, P.O. Box 12036, Research Triangle Park, NC 27709 2036, http:/www.ilzro.org.6Available from American National
11、Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.TABLE 1 GALFAN, Zn-5Al-MM Alloy Ingot ChemicalRequirementsA,B,C,D,EElementUNS Z38510Composition,%AluminumF4.26.2Cerium + lanthanum, total 0.030.10Iron, max 0.075Silicon, max 0.015LeadG, max 0.005CadmiumG, ma
12、x 0.005TinG, max 0.002OthersH, each, max 0.02OthersH, total, max 0.04Zinc 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 li
13、mit, in accordancewith the rounding procedure prescribed 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.CGALFAN, Zn-5Al-MM alloy ingot for hot-dip co
14、atings 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 the presence of these elementsup to these concentrations and, therefore, analyses are not required for theseelements.DMagnesium may be specified b
15、y 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 to 12 % maximum.GLead and cadmium, and to a lesser extent tin and antimony, are known tocause intergranular corrosion in zinc-aluminum alloys. For
16、 this reason it isimportant to maintain the levels of these elements below the limits specified.HExcept antimony, copper, magnesium, zirconium, and titanium.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Consh
17、ohocken, PA 19428-2959, United States.ISO 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 Terms shall be defined in accordance with
18、 TerminologyB899.3.2 Definitions of Terms Specific to This Standard:3.2.1 mischmetal, na naturally occurring mixture of rare-earth elements 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 Or
19、ders for ingot under this specification shall includethe relevant information as listed in Specification B949,Section 4.5. 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, slag, or other harmful contam
20、ination.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 chemical composition of the m
21、etal during thecourse of manufacture, he shall not be required to sample andanalyze the finished product.7. Sampling7.1 See appropriate requirements in Section 6 of Specifica-tion B949.8. Analytical Methods8.1 Method of AnalysisThe determination of chemicalcomposition shall be made in accordance wit
22、h ICP argonplasma spectrometric (Test Method E1277) or other methods(including spectrochemical methods ISO 3815-1 orISO 3815-2. In case of dispute, the results secured by TestMethod E1277 shall be the basis of acceptance.8.2 A standard practice for X-ray fluorescence spectrometryfor determination of
23、 cerium and lanthanum in a zinc-5 %aluminum alloy has been established by the International LeadZinc Research Organization (Standard Practice GF-1). In caseof dispute, the results secured by Test Method E1277 shall bethe basis of acceptance.9. Inspection9.1 See Section 9 of Specification B949.10. Re
24、jection 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 for a reh
25、earing. 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.10.2 For additional information see Specification B949,Section 8.11. Certification11.1
26、See Section 9 of Specification B949.12. Product Marking12.1 See Section 10 of Specification B949.13. Packaging and Package Marking13.1 See Section 10 of Specification B949.14. Keywords14.1 GALFAN; hot dip coating alloy; zinc alloy; zinc-5 %aluminum mischmetal alloySUMMARY OF CHANGESCommittee B02 has
27、 identified the location of selected changes to this standard since the last issue (B750 - 09)that may impact the use of this standard. (Approved May 1, 2012.)(1) Revisions have been made to Sections 2, 4, 7, 9, 10, 11, 12and 13 to reference Specification B949 and deletion of certainsections of thes
28、e sections formerly a part of this standard.B750 122ASTM International takes no position respecting the validity 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 rig
29、hts, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject 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
30、 revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. 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
31、 you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard 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). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).B750 123
