ASTM F85-76(2002)

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 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.

General Information

• Status: Historical
• Publication Date: 09-Dec-2002
• ICS: 01.040.31 - Electronics (Vocabularies)
• ICS: 31.100 - Electronic tubes
• Technical Committee: F01 - Electronics
• Drafting Committee: F01.03 - Metallic Materials, Wire Bonding, and Flip Chip

Relations

• Replaces: ASTM F85-76(1997)e1 - Standard Practice for Nomenclature for Wire Leads Used as Conductors in Electron Tubes
• Effective Date: 10-Dec-2002
• Replaced By: ASTM F85-76(2009) - Standard Practice for Nomenclature for Wire Leads Used as Conductors in Electron Tubes
• Effective Date: 01-May-2009

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:F 85–76 (Reapproved 2002)
Standard Practice for
Nomenclature for Wire Leads Used as Conductors in
Electron Tubes
This standard is issued under the fixed designation F 85; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 3.3 Conventions—The diameter shall always precede and
be separated from the length by the letter“ x”. For example, a
1.1 This practice covers rules for designating one, two, or
wire 13 mm long and 0.508 mm in diameter will be referred to
three-piece round wire leads used as conductors through glass
as 508x13.
seals in electron tubes. Stranded leads and leads for semicon-
ductors are excluded.
4. Nomenclature
1.2 This standard does not purport to address all of the
4.1 The nomenclature for designating a lead shall consist of
safety concerns, if any, associated with its use. It is the
one, two, or three parts; for one-, two-, or three-piece leads,
responsibility of the user of this standard to establish appro-
respectively. Each of these parts shall specify for its piece the
priate safety and health practices and determine the applica-
diameter in millimetres, the length in millimetres, and the
bility of regulatory limitations prior to use.
material (see Section 4). The order for designating the compo-
2. Referenced Documents nent pieces shall be: (1) the inner lead section, (2) the press of
seal section, and (3) the outer lead section.
2.1 ASTM Standards:
4.1.1 Each portion of the designation shall be separated by
B 127 Specification for Nickel-Copper Alloy (UNS
a dash (—), for example,
N04400) Plate, Sheet, and Strip
508x13FeCuC40—406x2D—1016x8NiPtd,
B 160 Specification for Nickel Rod and Bar
corresponding to Inner Lead—Press Lead—Outer Lead,
F 15 Specification for Iron-Nickel-Cobalt Sealing Alloy
respectively.
F 29 Specification for Dumet Wire for Glass–to–Metal Seal
4.1.2 One-, two-, or three-piece leads shall be designated
Applications
according to the typical examples listed in Table 1.
F 30 Specification for Iron-Nickel Sealing Alloys
F 290 Specification for Round Wire for Winding Electron
5. Materials
Tube Grid Laterals
5.1 The material for a component lead section is generally
3. Dimensioning designated by use of its chemical symbol.Anumerical suffix at
the end of the material designation preceded by “C” (coating)
3.1 Diameter—The diameter shall be expressed in millime-
indicates percent of cladding or plating. For unspecified alloys,
tres. Three digits shall be used for all diameters under 1 mm
a numerical value between chemical symbols indicates the
and four or more digits shall be used for all diameters 1 mm
percent content of the material preceding the value.
and larger. A decimal point is understood to be present three
5.2 Additional descriptive suffixes are given in Table 2.
places from the right.
5.3 Materials List—Commonly used lead wire materials
3.2 Length—The length shall be expressed in millimetres
and their respective designations are listed in Table 3. Where
using any number of digits.
trade names are indicated, equivalent materials may be used.
NOTE 1—All fractions shall be expressed in millimetres as decimals.
5.4 Annealing Treatments—For special applications it is
sometimes desirable to have the entire lead, or certain parts,
with an extremely soft temper. To satisfy these conditions,
standard treatments are available as follows:
This practice is under the jurisdiction ofASTM Committee F01 on Electronics
and is the direct responsibility of Subcommittee F01.03 on Metallic Materials.
5.4.1 Anneal Types:
Current edition approved Dec. 10, 2002. Published May 2003. Originally
5.4.1.1 Entire Lead Anneal (No. 1)—Entire leads involving
e1
approved in 1967. Last previous edition approved in 1997 as F 85-76 (1997) .
2 nickel and copper are annealed at a temperature suitable for
Annual Book of ASTM Standards, Vol 02.04.
Annual Book of ASTM Standards, Vol 10.04.
annealing copper but below the annealing point for nickel.
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F 85–76 (2002)
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
...