ASTM B521-98

    Standard Specification for Tantalum and Tantalum Alloy Seamless and Welded Tubes

    SUPERSEDED (see Active link, below)


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    1. Scope

    1.1 This specification covers tantalum and tantalum alloy seamless and welded tubes of the following grades:

    1.1.1 UNS Grade R05400 -Unalloyed tantalum, powder-metallurgy consolidation,

    1.1.2 UNS Grade R05200 -Unalloyed tantalum, vacuum melted,

    1.1.3 UNS Grade R05252 -Tantalum + 2.5% tungsten alloy, vacuum melted.

    1.1.4 UNS Grade R05255 -Tantalum + 10% tungsten alloy, vacuum melted.

    1.1.5 UNS Grade R05240 -Tantalum alloy, 60% tantalum, 40% columbium, electron-beam furnace or vacuum arc melt, or both.

    1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications


    ICS Code

    ICS Number Code 77.150.99 (Other products of non-ferrous metals)

    UNSPSC Code

    UNSPSC Code


    DOI: 10.1520/B0521-98

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