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ASTM A421/A421M-05

Historical Revision

Standard Specification for Stress-Relieved Steel Wire for Prestressed Concrete

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1.1 This specification covers two types of uncoated stress-relieved round high-carbon steel wire commonly used in prestressed linear concrete construction, as follows:

1.1.1 Type BA wire is used for applications in which cold-end deformation is used for anchoring purposes (Button Anchorage), and

1.1.2 Type WA wire is used for application in which the ends are anchored by wedges, and no cold-end deformation of the wire is involved (Wedge Anchorage).

1.2 Supplement I describes low relaxation wire and relaxation testing for that product.

1.3 The values stated in either inch-pound or SI units are to be regarded as 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 shall be used independently of the other, without combining values in any way.


This specification covers two types of uncoated stress-relieved round high-carbon steel wire commonly used in prestressed linear concrete construction. These two types are the type BA used for applications in which cold-end deformation is used for anchoring purposes and type WA wire which is used for application in which the ends are anchored by wedges, no cold-end deformation of the wire is involved. Required tensile strength, yield strength and elongation shall be evaluated using stress-relaxation test. Heat analysis shall be used to determine the percentage of specified elements especially sulfur and phosphorus to meet the required chemical composition.


SDO ASTM: ASTM International
Document Number A421
Publication Date March 1, 2005
Language en - English
Page Count 4
Revision Level 05
Supercedes
Committee A01.05
Publish Date Document Id Type View
May 1, 2021 A0421_A0421M-21 Revision
Nov. 1, 2015 A0421_A0421M-15 Revision
Nov. 1, 2010 A0421_A0421M-10 Revision
March 1, 2005 A0421_A0421M-05 Revision
Sept. 10, 2002 A0421_A0421M-02 Revision
Sept. 10, 1998 A0421_A0421M-98A Revision