ASTM_B_860_-_16.pdf

Designation:B86016Standard Specification forZinc Master Alloys for Use in Hot Dip Galvanizing1This standard is issued under the fixed designation B860;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 This specification covers zinc master alloys which areused in hot dip galvanizing for the purpose of adjusting theconcentration of certain alloying elements in the molten zincbath.Table 1 covers the chemical composition of thesematerials which include six master alloys of zinc-aluminum(brightener)and one master alloy of zinc-antimony.ASTMCommonUNSType A-190/10 Zn/AlHigh PurityZ30750Type A-290/10 Zn/AlLow PurityZ31710Type A-395/5Zn/AlHigh PurityZ30503Type A-495/5Zn/AlLow PurityZ31510Type A-596/4Zn/AlHigh PurityZ31520Type A-696/4Zn/AlLow PurityZ30504Type S-190/10 Zn/SbZ55710NOTE1The master alloys in Specification B860 are intended to beused primarily in hot-dip galvanizing to adjust the concentration of certainelements in a molten zinc bath,and differ from the zinc-aluminum alloysin Specification B997 which are intended to be used primarily in moltenzinc-aluminum.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 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:2B897 Specification for Configuration of Zinc and ZincAlloyJumbo,Block,Half Block,and Slab IngotB899 Terminology Relating to Non-ferrous Metals and Al-loysB949 Specification for General Requirements for Zinc andZinc Alloy ProductsB997 Specification for Zinc-Aluminum Alloys in IngotForm for Hot-Dip CoatingsE29 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)E536 Test Methods for Chemical Analysis of Zinc and ZincAlloys2.3 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 Terms defined in Terminology B899 shall apply unlessdefined otherwise in this standard.3.2 Definitions of Terms Specific to This Standard:3.2.1 brightener bar,nbrightener bar is a zinc alloycontaining aluminum which is added to the galvanizing bath toadjust the aluminum content of the bath to:suppress theformation of iron-zinc alloy layers,increase the brightness andductility of the galvanized coating,and improve the drainage ofzinc from the work as it exits the bath;also called brightener.4.Ordering Information4.1 Orders for ingots under this specification shall includethe following information:1This 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 1995.Last previous edition approved in 2015 as B860 15.DOI:10.1520/B0860-16.2For 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.3Available 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 4.1.1 Quantity,lb,4.1.2 Alloy type(see Table 1),4.1.3 Size and type of ingot(jumbo,type 1 block,type 2block,slab or other ingot shape),if not manufacturersstandard,4.1.4 Specification number and year date,4.1.5 Source inspection(see Section 8),and4.1.6 Marking(see Section 10).5.Materials and Manufacture5.1 See Specification B949.6.Chemical Requirements6.1 See Specification B949.7.Size and Shape7.1 Master alloys may be ordered as jumbos,blocks,slabsor other ingot configurati