ASTM F85-76(2009)
(Practice)Standard Practice for Nomenclature for Wire Leads Used as Conductors in Electron Tubes
Standard Practice for Nomenclature for Wire Leads Used as Conductors in Electron Tubes
ABSTRACT
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.
SCOPE
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 and health practices and determine the applicability of regulatory limitations prior to use.
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:F85–76 (Reapproved 2009)
Standard Practice for
Nomenclature for Wire Leads Used as Conductors in
Electron Tubes
This standard is issued under the fixed designation F85; the number immediately following the designation indicates the year of original
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (ϵ) indicates an editorial change since the last revision or reapproval.
1. Scope and four or more digits shall be used for all diameters 1 mm
and larger. A decimal point is understood to be present three
1.1 This practice covers rules for designating one, two, or
places from the right.
three-piece round wire leads used as conductors through glass
3.2 Length—The length shall be expressed in millimetres
seals in electron tubes. Stranded leads and leads for semicon-
using any number of digits.
ductors are excluded.
1.2 The values stated in SI units are to be regarded as
NOTE 1—All fractions shall be expressed in millimetres as decimals.
standard. No other units of measurement are included in this
3.3 Conventions—The diameter shall always precede and
standard.
be separated from the length by the letter“ x”. For example, a
1.3 This standard does not purport to address all of the
wire 13 mm long and 0.508 mm in diameter will be referred to
safety concerns, if any, associated with its use. It is the
as 508x13.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
4. Nomenclature
bility of regulatory limitations prior to use.
4.1 The nomenclature for designating a lead shall consist of
one, two, or three parts; for one-, two-, or three-piece leads,
2. Referenced Documents
respectively. Each of these parts shall specify for its piece the
2.1 ASTM Standards:
diameter in millimetres, the length in millimetres, and the
B127 Specification for Nickel-Copper Alloy (UNS
material (see Section 4). The order for designating the compo-
N04400) Plate, Sheet, and Strip
nent pieces shall be: (1) the inner lead section, (2) the press of
B160 Specification for Nickel Rod and Bar
seal section, and (3) the outer lead section.
F15 Specification for Iron-Nickel-Cobalt Sealing Alloy
4.1.1 Each portion of the designation shall be separated by
F29 Specification for Dumet Wire for Glass-to-Metal Seal
a dash (—), for example,
Applications
508x13FeCuC40—406x2D—1016x8NiPtd,
F30 Specification for Iron-Nickel Sealing Alloys
corresponding to Inner Lead—Press Lead—Outer Lead,
F290 Specification for Round Wire for Winding Electron
respectively.
Tube Grid Laterals
4.1.2 One-, two-, or three-piece leads shall be designated
according to the typical examples listed in Table 1.
3. Dimensioning
3.1 Diameter—The diameter shall be expressed in millime-
5. Materials
tres. Three digits shall be used for all diameters under 1 mm
5.1 The material for a component lead section is generally
designated by use of its chemical symbol.Anumerical suffix at
the end of the material designation preceded by “C” (coating)
This practice is under the jurisdiction ofASTM Committee F01 on Electronics
indicates percent of cladding or plating. For unspecified alloys,
and is the direct responsibility of Subcommittee F01.03 on Metallic Materials.
a numerical value between chemical symbols indicates the
CurrenteditionapprovedMay1,2009.PublishedJuly2009.Originallyapproved
percent content of the material preceding the value.
in 1967. Last previous edition approved in 2002 as F85 - 76 (2002). DOI:
10.1520/F0085-76R09.
5.2 Additional descriptive suffixes are given in Table 2.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.3 Materials List—Commonly used lead wire materials
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
and their respective designations are listed in Table 3. Where
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. trade names are indicated, equivalent materials may be used.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
F85–76 (2009)
TABLE 1 Designation for One, Two, or Three-Piece Leads
Component Sections
No. of Inner lead Press of Seal Lead Outer Lead
Lead Wire Designation
Sections Dia Length Dia Length Dia Length
A A A
Material Material Material
mm mm mm mm mm mm
1 1524x21D . . . 1.524 21 D . . .
2 1016x25Ni–1524 1.016 25 Ni 1.524 14 D . . .
x14D
3 508x13FeCuC40– 0.508 13 FeCuC40 0.406 2 D 1.016 8 NiPtd
406x2D–1016x8NiPtd
A
See 5.3 and Table 3 for interpretation of designations.
TABLE 2 Descriptive Su
...
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