ASTM A821/A821M-99
Historical Standard: ASTM A821/A821M-99 Standard Specification for Steel Wire, Hard Drawn for Prestressing Concrete Tanks
SUPERSEDED (see Active link, below)
ASTM A821 / A821M
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 1-Type 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 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
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
Keywords
prestressed concrete tanks; steel wire; Concrete reinforcement--specifications; Concrete tanks; Prestressed concrete; Redrawing; Shipping containers/materials/applications--specifications; Steel wire (prestressed concrete); Tanks--specifications
ICS Code
ICS Number Code 77.140.15 (Steels for reinforcement of concrete)
DOI: 10.1520/A0821_A0821M-99
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