ASTM A421/A421M-21

Die Annotation des Normtextes ASTM A421/A421M-21 :

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.


Keywords:
cold-drawn wire, low-relaxation wire, prestressed concrete, steel wire (tendon), stress-relieved wire,, ICS Number Code 77.140.15 (Steels for reinforcement of concrete),77.140.65 (Steel wire, wir ropes and link chains)