ASTM F4-66(2005)

Standard Specification for Carbonized Nickel Strip and Carbonized Nickel-Plated and Nickel-Clad Steel Strip for Electron Tubes (Withdrawn 2010)

ABSTRACT
This specification covers carbonized nickel strip, carbonized nickel-plated, and nickel clad steel strips for use in electron tubes. The carbonized strips should have a uniform appearance with surfaces free of any lubricant. The firing process used for testing carbon loss should be done in a way that ensures an acceptable standard of quality for operation in electron-tube applications. Test specimens should be protected using a suitable covered boat to prevent radiation from the furnace heating elements or direct gas impingement. After firing, samples should not show any visual carbon loss or exposed uncarbonized bare metal. Unless otherwise specified, each coil or spool should be of continuous length of strip without any kind of joint. Each strip should be coiled so that the normal curvature is not reversed.
SCOPE
1.1 This specification covers carbonized nickel strip and carbonized nickel-plated and nickel-clad steel strip for use in electron tubes.  
1.2 The values stated in inch-pound units are to be regarded as the standard. The metric equivalents of inch-pound units may be approximate.
WITHDRAWN RATIONALE
This specification covers carbonized nickel strip and carbonized nickel-plated and nickel-clad steel strip for use in electron tubes.
Formerly under the jurisdiction of Committee F01 on Electronics and F01.03 on Metallic Materials, this specification was withdrawn with no replacement in October 2010 because of lack of interest in the standard.

General Information

• Status: Withdrawn
• Publication Date: 31-Dec-2004
• Withdrawal Date: 30-Sep-2010
• ICS: 77.150.40 - Nickel and chromium products
• Technical Committee: F01 - Electronics
• Drafting Committee: F01.03 - Metallic Materials, Wire Bonding, and Flip Chip

Relations

• Replaces: ASTM F4-66(1999) - Standard Specification for Carbonized Nickel Strip and Carbonized Nickel-Plated and Nickel-Clad Steel Strip for Electron Tubes
• 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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: F4 – 66 (Reapproved 2005)
Standard Specification for
Carbonized Nickel Strip and Carbonized Nickel-Plated and
1
Nickel-Clad Steel Strip for Electron Tubes
This standard is issued under the fixed designation F4; the number immediately following the designation indicates the year of original
adoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 4.2 Width—Forstriplessthan3.0in.(76mm)wideandless
than 0.020 in. (0.51 mm) thick, the width tolerance shall be
1.1 This specification covers carbonized nickel strip and
60.005 in. (0.13 mm).
carbonized nickel-plated and nickel-clad steel strip for use in
4.3 Edgewise Bow shall be a maximum of 0.5 in. (13 mm)
electron tubes.
in 8 ft (2.4 m).
1.2 The values stated in inch-pound units are to be regarded
4.4 Edge—The edge shall be such as would result from a
as the standard. The metric equivalents of inch-pound units
standard slitting operation.
may be approximate.
4.5 Burr—The burr shall not exceed one half the strip
2. Referenced Documents
thickness or 0.0025 in. (0.064 mm) whichever is smaller, as
2
measured in accordance with the procedure described in the
2.1 ASTM Standards:
Appendix of Specification F1.
F1 Specification for Nickel-Clad and Nickel-Plated Steel
32
Strip for Electron Tubes
5. Workmanship, Finish, and Appearance
F3 Specification for Nickel Strip for Electron Tubes
5.1 The surface shall be free of any lubricant used in
F155 Test Method forTemper of Strip and Sheet Metals for
4
processing. The appearance of the carbonized strip shall be
Electronic Devices (Spring-Back Method)
uniform.
3. Temper 5.2 Other appearance characteristics shall be defined as
agreed upon by the producer and the consumer.
3.1 The temper of the strip shall conform to limits agreed
upon by the producer and the consumer, and shall be deter-
6. Test for Carbon Loss
mined in accordance with Test Method F155.
6.1 Testing for carbon loss by firing of carbonized materials
4. Dimensions, Mass and Permissible Variations
covered by this specification shall be conducted in such a
manner as to ensure an acceptable standard of quality for
4.1 Thickness—The thickness of the material shall conform
operation in electron-tube applications.
to the following tolerances:
6.2 The materials being tested shall be protected by the use
Thickness, in. (mm) Thickness, Tolerance, in. (mm)
Under 0.010 (0.25) 60.0005 (0.013) of a suitable covered boat, so as to prevent direct radiation
0.010 to 0.020 (0.25 to 0.5), incl 60.0008 (0.020)
from the furnace heating elements or direct impingement of
gas.
6.3 The cooling section of the furnace shall contain the
The thickness shall be measured 0.375 in. (9.5 mm) from the
same atmosphere as that in the hot zone.
edge on 1-in. (25.4-mm) or wider strip, or at any point on
6.4 The furnace atmosphere shall consist of pure hydrogen
narrower strip.
or25%nitrogenand75%hydrogen,andshallhaveamoisture
content no greater than saturation at−45°C. The maximum
1
This specification is under the jurisdiction of ASTM Committee F01 on
oxygen content of the furnace atmosphere shall be 0.001% by
Electronics and is the direct responsibility of Subcommittee F01.03 on Metallic
volume.
Materials.
Current edition approved January 1, 2005. Published January 2005. Originally 6.5 The firing temperature shall be 850 6 10°C. The firing
approved in 1957. Last previous edition appro
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