ASTM_B_943_-_16.pdf

Designation:B94316Standard Specification forZinc and Tin Alloy Wire Used in Thermal Spraying forElectronic Applications1This standard is issued under the fixed designation B943;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 and tin alloy wire,includ-ing zinc-aluminum,zinc-aluminum-copper,zinc-tin,zinc-tin-copper and tin-zinc,used as thermal spray wire in the elec-tronics industry.1.1.1 Certain alloys specified in this standard are also usedas solders for the purpose of joining together two or moremetals at temperatures below their melting points,and for otherpurposes(as noted in Annex A1).Specification B907 coversZinc,Tin and Cadmium BaseAlloys Used as Solders which areused primarily for the purpose of joining together two or moremetals at temperatures below their melting points and for otherpurposes(as noted in the Annex part of Specification B907).Specification B833 covers Zinc and Zinc Alloy Wire forThermal Spraying(Metallizing)used primarily for the corro-sion protection of steel(as noted in the Annex part ofSpecification B833).1.1.2 Tin base alloys are included in this specificationbecause their use in the electronics industry is similar to the useof certain zinc alloys but different than the major use of the tinand lead solder compositions specified in Specification B32.1.1.3 These wire alloys have a nominal liquidus temperaturenot exceeding 850F(455C).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:2B32 Specification for Solder MetalB833 Specification for Zinc and Zinc Alloy Wire for Ther-mal Spraying(Metallizing)for the Corrosion Protection ofSteelB899 Terminology Relating to Non-ferrous Metals and Al-loysB907 Specification for Zinc,Tin and Cadmium Base AlloysUsed as SoldersB949 Specification for General Requirements for Zinc andZinc Alloy ProductsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE46 Test Methods for Chemical Analysis of Lead-andTin-Base Solder(Withdrawn 1994)3E51 Method for Spectrographic Analysis of Tin Alloys bythe Powder Technique(Withdrawn 1983)3E87 Methods for ChemicalAnalysis of Lead,Tin,Antimonyand Their Alloys(Photometric Method)(Withdrawn1983)3B527 Test Method for Tap Density of Metal Powders andCompoundsE536 Test Methods for Chemical Analysis of Zinc and ZincAlloys2.2 Federal Standard:4Fed.Std.No.123 Marking for Shipment(Civil Agencies)2.3 ISO Standards:5ISO 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 spectrometry1This 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 2005.Last previous edition approved in 2013 as B943 13.DOI:10.1520/B0943-16.2For 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.3The last approved version of this historical standard is referenced onwww.astm.org.4Available from DLA Document Services,Building 4/D,700 Robbins Ave.,Philadelphia,PA 19111-5094,http:/quicksearch.dla.mil.5Available 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 2.4 Military Standard:4MIL-STD-129 Marking for Shipment and Storage3.Terminology3.1 Terms shall be defined in accordance with TerminologyB899.4.Classification4.1 Type DesignationThe type designation uses the fol-lowing symbols to properly identify the material:4.1.1 Alloy CompositionThe composition is identified bya two or four-letter symbol and a number.The letters typicallyindicate the chemical symbol for the critic