ASTM B943-09

    Standard Specification for Zinc and Tin Alloy Wire Used in Thermal Spraying for Electronic Applications


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    1. Scope

    1.1 This specification covers zinc and tin alloy wire, including zinc-aluminum, zinc-aluminum-copper, zinc-tin, zinc-tin-copper and tin-zinc, used as thermal spray wire in the electronics industry.

    1.1.1 Certain alloys specified in this standard are also used as solders for the purpose of joining together two or more metals at temperatures below their melting points, and for other purposes (as noted in Annex A1). Specification B907 covers Zinc, Tin and Cadmium Base Alloys Used as Solders which are used primarily for the purpose of joining together two or more metals at temperatures below their melting points and for other purposes (as noted in the Annex part of Specification B907). Specification B833 covers Zinc and Zinc Alloy Wire for Thermal Spraying (Metallizing) used primarily for the corrosion protection of steel (as noted in the Annex part of Specification B833).

    1.1.2 Tin base alloys are included in this specification because their use in the electronics industry is similar to the use of certain zinc alloys but different than the major use of the tin and lead solder compositions specified in Specification B32.

    1.1.3 These wire alloys have a nominal liquidus temperature not exceeding 850°F (455°C).

    1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

    1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to become familiar with all hazards including those identified in the appropriate Material Safety Data Sheet (MSDS) for this product/material as provided by the manufacturer, to establish appropriate safety and health practices, and determine the applicability of regulatory limitations prior to use.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    B32 Specification for Solder Metal

    B527 Test Method for Determination of Tap Density of Metallic Powders and Compounds

    B833 Specification for Zinc and Zinc Alloy Wire for Thermal Spraying (Metallizing) for the Corrosion Protection of Steel

    B899 Terminology Relating to Non-ferrous Metals and Alloys

    B907 Specification for Zinc, Tin and Cadmium Base Alloys Used as Solders

    E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications

    E46 Test Methods for Chemical Analysis of Lead- and Tin-Base Solder

    E51 Method for Spectrographic Analysis of Tin Alloys by the Powder Technique

    E87 Methods for Chemical Analysis of Lead, Tin, Antimony and Their Alloys (Photometric Method)

    E536 Test Methods for Chemical Analysis of Zinc and Zinc Alloys

    Federal Standard

    Fed.Std.No.123 Marking for Shipment (Civil Agencies)

    ISO Standards

    ISO3815-1 Zinc and zinc alloys -- Part 1: Analysis of solid samples by optical emission spectrometry

    ISO3815-2 Zinc and zinc alloys -- Part 2: Analysis by inductively coupled plasma optical emission spectrometry

    Military Standard

    MIL-STD-129 Marking for Shipment and Storage


    ICS Code

    ICS Number Code 25.220.20 (Surface treatment)

    UNSPSC Code

    UNSPSC Code 23281503(Thermal spray machine)


    Referencing This Standard

    DOI: 10.1520/B0943-09

    ASTM International is a member of CrossRef.


    Citation Format

    ASTM B943-09, Standard Specification for Zinc and Tin Alloy Wire Used in Thermal Spraying for Electronic Applications, ASTM International, West Conshohocken, PA, 2009, www.astm.org

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