ASTM F290-94(2005)

Standard Specification for Round Wire for Winding Electron Tube Grid Laterals

ABSTRACT
This specification covers round wires made from UNS N02211, UNS N10001, or N03300 nickel alloy or molybdenum, with diameters within a specified range, for winding electron tube grid laterals. The wires are classified into five classes based on tensile properties. All wires should conform to the required values of tensile strength, yield strength, working range, and elongation properties. The surface of each bare wire should be bright and free from cracks, slivers, fissures, lubricants, or other detrimental defects, while all platings should be free from bubbles, flakes, blisters, porosity, and plating salts. Wires should be spooled in one continuous length and in such a manner that it can be unwound under reasonable tension without binding or becoming distorted.
SCOPE
1.1 This specification covers round wire up to 0.006 in. (0.15 mm) in diameter for use as electron tube grid lateral winding wire.
1.2 Five classes of wire are covered based on their tensile properties (see and ).
1.3 The values stated in inch-pound units are to be regarded as the standard. The metric equivalents of inch-pound units may be approximate.
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: 31-Dec-2004
• ICS: 29.060.10 - Wires
• Technical Committee: F01 - Electronics
• Drafting Committee: F01.03 - Metallic Materials, Wire Bonding, and Flip Chip

Relations

• Replaces: ASTM F290-94(1999) - Standard Specification for Round Wire for Winding Electron Tube Grid Laterals
• Effective Date: 01-Jan-2005
• Replaced By: ASTM F290-94(2010) - Standard Specification for Round Wire for Winding Electron Tube Grid Laterals
• Effective Date: 01-Oct-2010
• Referred By: ASTM F85-76(2018) - Standard Practice for Nomenclature for Wire Leads Used as Conductors in Electron Tubes (Withdrawn 2023)
• Effective Date: 01-Jan-2005

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: F290 – 94 (Reapproved 2005)
Standard Specification for
1
Round Wire for Winding Electron Tube Grid Laterals
ThisstandardisissuedunderthefixeddesignationF290;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Terminology
1.1 This specification covers round wire up to 0.006 in. 3.1 Description of Terms:
(0.15 mm) in diameter for use as electron tube grid lateral 3.1.1 The following description of terms shall apply to the
winding wire. requirements specified in Table 1:
1.2 Five classes of wire are covered based on their tensile 3.1.1.1 breaking strength—The stress at which the speci-
properties (see 5.2 and 5.3). men breaks.
1.3 The values stated in inch-pound units are to be regarded 3.1.1.2 elongation—The maximum percent of stretch in a
as the standard. The metric equivalents of inch-pound units specimen of 10-in. (250-mm) gage length.
may be approximate. 3.1.1.3 tensile strength— The ultimate strength of the ma-
1.4 This standard does not purport to address all of the terial expressed either as grams per milligram per 200 mm
safety concerns, if any, associated with its use. It is the length of wire or pounds per square inch.
responsibility of the user of this standard to establish appro- 3.1.1.4 ultimate strength—The maximum stress developed
priate safety and health practices and determine the applica- in a specimen.
bility of regulatory limitations prior to use. 3.1.1.5 work load—The difference between the yield load
and the ultimate load.
2. Referenced Documents
3.1.1.6 yield strength— The stress developed at 1 percent
2
2.1 ASTM Standards:
elongation when testing a specimen of 10-in. (250-mm) gage
3
E39 Test Methods for Chemical Analysis of Nickel length.
E107 Test Methods for Chemical Analysis of Electronic
4
4. Chemical Composition
Nickel
E129 Test Method for Spectrographic Analysis of Thermi- 4.1 The wire shall conform to the requirements as to
onic Nickel Alloys by the Powder Techniques chemical composition as prescribed in Table 2.
F16 Test Methods for Measuring Diameter or Thickness of
5. Tensile Properties
Wire and Ribbon for Electronic Devices and Lamps
5.1 The wire shall conform to the requirements as to tensile
F205 Test Method for Measuring Diameter of Fine Wire by
Weighing strength, yield strength, working range, and elongation prop-
erties as prescribed in Table 1 for the class of wire designated.
F288 Specification for Tungsten Wire for Electron Devices
and Lamps 5.2 The class designations for the nickel-titanium-
magnesium alloy UNS N03300; the nickel-manganese alloy
F289 Specification for Molybdenum Wire and Rod for
Electronic Applications UNSN02211;molybdenumwire,andthenickel-molybdenum-
ironalloyUNSN10001;arebasedontheirtensilepropertiesas
follows:
5.2.1 Class I—The wire shall conform to elongation prop-
1
This specification is under the jurisdiction of ASTM Committee F01 on
erties as specified in ranges in Table 1.
Electronics and is the direct responsibility of Subcommittee F01.03 on Metallic
5.2.2 Class II—The wire shall conform to the following
Materials.
Current edition approved Jan. 1, 2005. Published January 2005. Originally
tensile properties:
approved in 1954 as B290 – 54 T; redesignated F290 in 1955. Last previous edition
5.2.2.1 Yield strength with a spread of approximately6
approved in 1999 as F290 – 94 (1999). DOI: 10.1520/F0290-94R05.
2 15 %, as shown in grams-force, minimum and maximum, in
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Table 2,
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
5.2.2.2 Working range, as specified in Table 1, and
the ASTM website.
5.2.2.3 Elongation as specified in Table 1.
3
Discontinued; see 1994 Annual Book of ASTM Standards, Vol 03.05.
4 5.2.3 Class III—The wire shall conform to the following
Withdrawn. The last approved version of this historical standard is referenced
on www.astm.org. tensile properties:
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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F290 – 94 (2005)
5.2.3.1 Yield strength with a spread of approximately6 5.3 The class designations for tungsten wire are as follows:
10 %, as shown in grams-force, minimum and maximum, in
5.3.1 Classes IV and V— Tungsten wire UNS R07005 shall
Table 1.
conform to the tensile properties for both classes as prescribed
5.2.3.2 A larger working range as specified in Table 1, and
in Table 3.
5.2.3.3 Elongation as specified in Table 1
...