Active Standard ASTM B907 | Developed by Subcommittee: B02.04
Book of Standards Volume: 02.04
Historical (view previous versions of standard)
This specification covers solder metal alloys used as solders for the purpose of joining together two or more metals at temperatures below their melting points. The solder alloy shall conform to the required chemical compositions of cadmium, zinc, tin, lead, antimony, silver, copper, aluminum, bismuth, arsenic, iron, nickel and magnesium. The solder paste shall conform to the required smoothness of textures, powder mesh size, and viscosity.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
1.1 This specification covers solder metal alloys (commonly known as soft solders), including zinc-aluminum, zinc-aluminum-copper, zinc-tin, zinc-tin-copper, zinc-cadmium-tin, zinc-cadmium, tin-zinc, cadmium-zinc, cadmium-zinc-silver, and cadmium-silver, used as solders for the purpose of joining together two or more metals at temperatures below their melting points.
1.1.1 Certain alloys specified in this standard are also used as Thermal Spray Wire in the electronics industry and are covered for this purpose in Specification B943. Specification B833 covers Zinc and Zinc Alloy Wire for Thermal Spraying (Metallizing) used primarily for the corrosion protection of steel (as noted in Annex A1 of this specification).
1.1.2 Tin base alloys are included in this specification because their use in the electronics industry is different than the major use of the tin and lead solder compositions specified in Specification B32.
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 Toxicity—Warning: Soluble and respirable forms of cadmium may be harmful to human health and the environment in certain forms and concentrations. Therefore, ingestion and inhalation of cadmium should be controlled under the appropriate regulations of the U.S. Occupational Safety and Health Administration (OSHA). Cadmium-containing alloys and coatings should not be used on articles that will contact food or beverages, or for dental and other equipment that is normally inserted in the mouth. Similarly, if articles using cadmium-containing alloys or coatings are welded, soldered, brazed, ground, flame-cut, or otherwise heated during fabrication, adequate ventilation must be provided to maintain occupational cadmium exposure below the OSHA Permissible Exposure Level (PEL).
1.4 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.
B32 Specification for Solder Metal
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
B943 Specification for Zinc and Tin Alloy Wire Used in Thermal Spraying for Electronic Applications
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
E55 Practice for Sampling Wrought Nonferrous Metals and Alloys for Determination of Chemical Composition
E87 Methods for Chemical Analysis of Lead, Tin, Antimony and Their Alloys (Photometric Method)
E88 Practice for Sampling Nonferrous Metals and Alloys in Cast Form for Determination of Chemical Composition
E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)
E536 Test Methods for Chemical Analysis of Zinc and Zinc Alloys
ISO StandardsISO 3815-1 Zinc and zinc alloys -- Part 1: Analysis of solid samples by optical emission spectrometry ISO 3815-2 Zinc and zinc alloys -- Part 2: Analysis by inductively coupled plasma optical emission spectrometry
Military StandardMil-Std-129 Marking for Shipment and Storage
Federal StandardFed. Std. No. 123 Marking for Shipment (Civil Agencies)
ICS Number Code 77.120.60 (Lead, zinc, tin and their alloys)
UNSPSC Code 23271806(Solder)