ASTM A821/A821M-05

    Standard Specification for Steel Wire, Hard Drawn for Prestressing Concrete Tanks

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    1. Scope

    1.1 This specification covers uncoated, high-strength, hard-drawn steel wire for use in the manufacture of prestressed concrete tanks and similar structures. In application, the wire is continuously wrapped on the structure maintaining tension by a device employing a wire drawing die, or mechanical tensioning system without redrawing.

    1.2 This specification is applicable only to the condition of the wire as delivered to the user. It is not applicable to the properties or condition of the wire after application.

    1.2.1 Type A wire is to be tensioned by drawing through a wire drawing die or by a mechanical system without redrawing.

    1.2.2 Type B wire is drawn to finished size by the manufacturer for tensioning by a mechanical system without redrawing. Note 1Type A wire, when tensioned by drawing through a die, may not function properly if the user does not ensure that during application the surface of the wire is free of rust and foreign materials that can be detrimental to good wire drawing practice. Further, the user should ensure that proper wire drawing techniques are followed, including adequate lubrication, cooling, and proper die mechanics.

    1.3 The values stated in either inch-pound or SI units are to be regarded as the standard. Within the text, the inch-pound units are shown in parentheses. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification.


    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

    A370 Test Methods and Definitions for Mechanical Testing of Steel Products

    A510 Specification for General Requirements for Wire Rods and Coarse Round Wire, Carbon Steel

    A700 Practices for Packaging, Marking, and Loading Methods for Steel Products for Shipment

    A751 Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products

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


    UNSPSC Code

    UNSPSC Code 31152207(Prestressed concrete steel wire)


    DOI: 10.1520/A0821_A0821M-05

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