ASTM_B_750_-_16.pdf

Designation:B75016Standard 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,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 ThisspecificationcoversGALFAN,zinc-5%aluminum-mischmetal(Zn-5Al-MM)alloy(UNS Z38510)3iningot form 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 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 appropriateSafety Data Sheet(SDS)for this product/material as providedby the manufacturer,to establish appropriate safety and healthpractices,and determine the applicability of regulatory limi-tations prior to use.2.Referenced Documents2.1 ASTM Standards:4B899 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 toDetermine Conformance with SpecificationsE88 Practice for Sampling Nonferrous Metals and Alloys inCast Form for Determination of Chemical CompositionE527 Practice for Numbering Metals and Alloys in theUnified Numbering System(UNS)E1277 Test Method for Analysis of Zinc-5%Aluminum-Mischmetal Alloys by ICP Emission Spectrometry2.2 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)2.3 ISO Standards:6ISO 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 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 Orders for ingot under this specification shall includethe relevant information as listed in Specification B949.5.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 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 samples1GALFAN 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 1,2016.Published July 2016.Originally approvedin 1985.Last previous edition approved in 2012 as B750 12.DOI:10.1520/B0750-16.3UNS 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 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 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,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 taken 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.7.Sampling7.1 See appropriate requirements in Specification B949.8.Analytical Methods8.1 Method of AnalysisThe determination of chemicalcomposition shall be made in accordance with ICP argonplasma spectrometric(Test Method E1277)or other methods(including spectrochemical methods ISO 3815-1 or ISO3815-2.In case of dispute,the results secured by Test MethodE1277 shall be the basis 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 International