ASTM B943-16(2022) - 1.4.2022
 
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 Safety Data Sheet (SDS) for this product/material as provided by the manufacturer, to establish appropriate safety, health, and environmental practices, and determine the applicability of regulatory limitations prior to use.

1.4?This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

 
2. Referenced Documents

ISO 3815-1

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

B907-16(2021)

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

B899-21

Standard Terminology Relating to Non-ferrous Metals and Alloys

B833-20

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

MIL-STD-129

Marking for Shipment and Storage

ISO 3815-2

Fed. Std. No. 123

Marking for Shipment (Civil Agencies)

E536-23

Standard Test Methods for Chemical Analysis of Zinc and Zinc Alloys

B32-20

Standard Specification for Solder Metal

B527-23

Standard Test Method for Tap Density of Metal Powders and Compounds

E87-58 (1978)

Methods for Chemical Analysis of Lead, Tin, Antimony and Their Alloys (Photometric Method) (Withdrawn 1984)

E51-67 (1978)

Method for Spetrographic Analysis of Tin Alloys by the Powder Technique (Withdrawn 1984)

E46-83 (1987)

Test Methods for Chemical Analysis of Lead- and Tin-Base Solder (Withdrawn 1994)

E29-22

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

B949-23

Standard Specification for General Requirements for Zinc and Zinc Alloy Products