ASTM F85-76(1997)e1

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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.
e1
Designation: F 85 – 76 (Reapproved 1997)
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
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. A number in parentheses indicates the year of last reapproval. A superscript
epsilon (e) indicates an editorial change since the last revision or reapproval.
e NOTE—Keywords were added editorially in November 1997.
1. Scope wire 13 mm long and 0.508 mm in diameter will be referred to
as 508x13.
1.1 This practice covers rules for designating one, two, or
three-piece round wire leads used as conductors through glass
4. Nomenclature
seals in electron tubes. Stranded leads and leads for semicon-
4.1 The nomenclature for designating a lead shall consist of
ductors are excluded.
one, two, or three parts; for one-, two-, or three-piece leads,
1.2 This standard does not purport to address all of the
respectively. Each of these parts shall specify for its piece the
safety concerns, if any, associated with its use. It is the
diameter in millimetres, the length in millimetres, and the
responsibility of the user of this standard to establish appro-
material (see Section 4). The order for designating the compo-
priate safety and health practices and determine the applica-
nent pieces shall be: (1) the inner lead section, (2) the press of
bility of regulatory limitations prior to use.
seal section, and (3) the outer lead section.
2. Referenced Documents 4.1.1 Each portion of the designation shall be separated by
a dash (—), for example,
2.1 ASTM Standards:
508x13FeCuC40—406x2D—1016x8NiPtd,
B 127 Specification for Nickel-Copper Alloy (UNS
2 corresponding to Inner Lead—Press Lead—Outer Lead,
N04400) Plate, Sheet, and Strip
respectively.
B 160 Specification for Nickel Rod and Bar
4.1.2 One-, two-, or three-piece leads shall be designated
F 15 Specification for Iron-Nickel-Cobalt Sealing Alloy
according to the typical examples listed in Table 1.
F 29 Specification for Dumet Wire for Glass–to–Metal Seal
Applications
5. Materials
F 30 Specification for Iron-Nickel Sealing Alloys
5.1 The material for a component lead section is generally
F 290 Specification for Round Wire for Winding Electron
3 designated by use of its chemical symbol. A numerical suffix at
Tube Grid Laterals
the end of the material designation preceded by “C” (coating)
3. Dimensioning indicates percent of cladding or plating. For unspecified alloys,
a numerical value between chemical symbols indicates the
3.1 Diameter—The diameter shall be expressed in millime-
percent content of the material preceding the value.
tres. Three digits shall be used for all diameters under 1 mm
5.2 Additional descriptive suffixes are given in Table 2.
and four or more digits shall be used for all diameters 1 mm
5.3 Materials List—Commonly used lead wire materials
and larger. A decimal point is understood to be present three
and their respective designations are listed in Table 3. Where
places from the right.
trade names are indicated, equivalent materials may be used.
3.2 Length—The length shall be expressed in millimetres
5.4 Annealing Treatments—For special applications it is
using any number of digits.
sometimes desirable to have the entire lead, or certain parts,
NOTE 1—All fractions shall be expressed in millimetres as decimals.
with an extremely soft temper. To satisfy these conditions,
3.3 Conventions—The diameter shall always precede and standard treatments are available as follows:
be separated from the length by the letter“ x”. For example, a 5.4.1 Anneal Types:
5.4.1.1 Entire Lead Anneal (No. 1)—Entire leads involving
nickel and copper are annealed at a temperature suitable for
This practice is under the jurisdiction of ASTM Committee F-1 on Electronics,
annealing copper but below the annealing point for nickel.
and is the direct responsibility of Subcommittee F01.03 on Metallic Materials.
Current edition approved Aug. 27, 1976. Published January 1977. Originally After annealing, the leads are put through a straightening
published as F 85-67T. Last previous edition F 85-69 (1974).
process to recondition any leads which become distorted
Annual Book of ASTM Standards, Vol 02.04.
during the anneal.
Annual Book of ASTM Standards, Vol 10.0
...