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 type BA used for applications in which cold-end deformation is used for anchoring purposes and type WA wire, which is used for applications 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 a 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.
WJE laboratories are accredited by ANAB (ISO/IEC 17025) to perform testing standard ASTM A421 for Stress-Relieved Steel Wire for Prestressed Concrete.
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KeywordsASTM A421 - Annealing - High-Carbon Steel - Prestressed Concrete - Prestressed Concrete Products - Steel Wires - Stress Relieving - Wires, Wire Strands, and Wire Ropes
ICS CODE77.140.15 (Steels for reinforcement of concrete); 77.140.65 (Steel wire, wire ropes, and link chains)
UNSPSC CODE31152207 (Prestressed concrete steel wire)
ASTM A421 / A421M-15, Standard Specification for Stress-Relieved Steel Wire for Prestressed Concrete, ASTM International, West Conshohocken, PA, 2015, www.astm.org