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Last Updated: Dec 31, 2010
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ASTM A421/A421M-05
Standard Specification for Uncoated Stress-Relieved Steel Wire for Prestressed Concrete
Standard Specification for Uncoated Stress-Relieved Steel Wire for Prestressed Concrete
A0421_A0421M-05
ASTM|A0421_A0421M-05|en-US
Standard Specification for Uncoated Stress-Relieved Steel Wire for Prestressed Concrete
Standard
A421/A421M Standard Specification for Uncoated Stress-Relieved Steel Wire for Prestressed Concrete>
new
BOS Vol. 01.04 Committee A01
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Abstract
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.
Scope
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.