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This practice covers the rules for naming one, two, or three-piece round wire leads used as conductors through glass seals in electron tubes, excluding stranded leads and leads for semiconductors. Each portion of designation should be separated by a dash (-). Materials for a component lead are generally designated using the chemical symbols. Claddings or platings are represented by numerical suffixes at the end of the material designation preceded by "C" (coating). For alloys that are unspecified, a numerical value between chemical symbols indicates the percent content of the material preceding the value. Descriptive suffixes are used to specify annealing conditions.
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 practice covers rules for designating one, two, or three-piece round wire leads used as conductors through glass seals in electron tubes. Stranded leads and leads for semiconductors are excluded.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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 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 (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
B127 Specification for Nickel-Copper Alloy (UNS N04400) Plate, Sheet, and Strip
B160 Specification for Nickel Rod and Bar
F15 Specification for Iron-Nickel-Cobalt Sealing Alloy
F29 Specification for Dumet Wire for Glass-to-Metal Seal Applications
F30 Specification for Iron-Nickel Sealing Alloys
F290 Specification for Round Wire for Winding Electron Tube Grid Laterals
ICS Number Code 01.040.31 (Electronics (Vocabularies)); 31.100 (Electronic tubes)
UNSPSC Code 26121500(Electrical wire); 32141000(Electron Tubes)
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ASTM F85-76(2018), Standard Practice for Nomenclature for Wire Leads Used as Conductors in Electron Tubes, ASTM International, West Conshohocken, PA, 2018, www.astm.orgBack to Top