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  • ASTM
    F288-96(2014) Standard Specification for Tungsten Wire for Electron Devices and Lamps
    Edition: 2014
    $103.58
    Unlimited Users per year

Description of ASTM-F288 2014

ASTM F288-96-Reapproved2014

Historical Standard: Standard Specification for Tungsten Wire for Electron Devices and Lamps




ASTM F288

Scope

1.1 This specification covers three types of drawn wire suitable for fabrication into parts for electron tubes, lamps, and other devices; and one type of rod for metal-to-glass sealing (grid wire is excepted):

1.1.1 Type 1A—Commercially pure nonsag wire (Note 2 and Note 3).

1.1.2 Type 1B—Commercially pure rod suitable for metal-to-glass sealing.

1.1.3 Type 2A—Thoriated filament wire containing 1 % thoria.

1.1.4 Type 2B—Thoriated filament wire containing 2 % thoria.

1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

1.3 Types 1A and 1B are designated as UNS R07005. Type 2A is designated as UNS R07911. Type 2B is designated as UNS R07912.

1.4 The following precautionary caveat pertains only to the Chemical Analysis, Section 12 of this specification: 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.

Note 1: A dimensional measurement method for testing nonsag tungsten wire above 0.030 in. (0.76 mm) in diameter is provided in Test Method F269.

Note 2: Acceptance of nonsag wire characteristics for particular applications of size shall be by agreement between producer and consumer based on either a flashed microstructure as shown by photomicrographs, or on dimensional measurement limits determined in accordance with Test Method F269.


Keywords

electron devices; thoriated tungsten wire; tungsten wire; UNS R07005; UNS R07911; UNS R07912


ICS Code

ICS Number Code 29.060.10 (Wires)


DOI: 10.1520/F0288-96R14

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About ASTM

ASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide.
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